Articles | Volume 19, issue 7
https://doi.org/10.5194/nhess-19-1347-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-19-1347-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Statistical theory of probabilistic hazard maps: a probability distribution for the hazard boundary location
Cooperative Institute for Meteorological Satellite Studies (CIMSS), University of Wisconsin, Madison, WI, USA
Department of Geological Sciences, University at Buffalo, Buffalo, NY, USA
Andrea Bevilacqua
Department of Geological Sciences, University at Buffalo, Buffalo, NY, USA
Computational Data Science and Engineering, University at Buffalo, Buffalo, NY, USA
Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione di Pisa, Pisa, Italy
Marcus I. Bursik
Department of Geological Sciences, University at Buffalo, Buffalo, NY, USA
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David M. Hyman and Michael J. Pavolonis
Atmos. Meas. Tech., 13, 5891–5921, https://doi.org/10.5194/amt-13-5891-2020, https://doi.org/10.5194/amt-13-5891-2020, 2020
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Understanding the lateral extent, altitude, and amount of sulfur dioxide (SO2) is important for studying volcanic clouds in support of aviation safety and for analyzing the effects of volcanoes on global climate.
In this study, we detail an enhanced satellite measurement that provides probability distributions for the altitude and concentration of SO2 instead of single estimates using the Cross-track Infrared Sounder (CrIS) on the Joint Polar Satellite System (JPSS) series of satellites.
This article is included in the Encyclopedia of Geosciences
Andrea Bevilacqua, Alvaro Aravena, Willy Aspinall, Antonio Costa, Sue Mahony, Augusto Neri, Stephen Sparks, and Brittain Hill
Nat. Hazards Earth Syst. Sci., 22, 3329–3348, https://doi.org/10.5194/nhess-22-3329-2022, https://doi.org/10.5194/nhess-22-3329-2022, 2022
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We evaluate through first-order kinetic energy models, the minimum volume and mass of a pyroclastic density current generated at the Aso caldera that might affect any of five distal infrastructure sites. These target sites are all located 115–145 km from the caldera, but in well-separated directions. Our constraints of volume and mass are then compared with the scale of Aso-4, the largest caldera-forming eruption of Aso.
This article is included in the Encyclopedia of Geosciences
Andrea Bevilacqua, Alvaro Aravena, Augusto Neri, Eduardo Gutiérrez, Demetrio Escobar, Melida Schliz, Alessandro Aiuppa, and Raffaello Cioni
Nat. Hazards Earth Syst. Sci., 21, 1639–1665, https://doi.org/10.5194/nhess-21-1639-2021, https://doi.org/10.5194/nhess-21-1639-2021, 2021
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We present novel probability maps for the opening position of new vents in the San Salvador (El Salvador) and Nejapa-Chiltepe (Nicaragua) volcanic complexes. In particular, we present thematic maps, i.e., we consider different hazardous phenomena separately. To illustrate the significant effects of considering the expected eruption style in the construction of vent opening maps, we focus on the analysis of small-scale pyroclastic density currents using an approach based on numerical modeling.
This article is included in the Encyclopedia of Geosciences
Alessandro Tadini, Andrea Bevilacqua, Augusto Neri, Raffaello Cioni, Giovanni Biagioli, Mattia de'Michieli Vitturi, and Tomaso Esposti Ongaro
Solid Earth, 12, 119–139, https://doi.org/10.5194/se-12-119-2021, https://doi.org/10.5194/se-12-119-2021, 2021
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In this paper we test a simplified numerical model for pyroclastic density currents or PDCs (mixtures of hot gas, lapilli and ash moving across the landscape under the effect of gravity). The aim is quantifying the differences between real and modelled deposits of some PDCs of the 79 CE eruption of Vesuvius, Italy. This step is important because in the paper it is demonstrated that this simplified model is useful for constraining input parameters for more computationally expensive models.
This article is included in the Encyclopedia of Geosciences
David M. Hyman and Michael J. Pavolonis
Atmos. Meas. Tech., 13, 5891–5921, https://doi.org/10.5194/amt-13-5891-2020, https://doi.org/10.5194/amt-13-5891-2020, 2020
Short summary
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Understanding the lateral extent, altitude, and amount of sulfur dioxide (SO2) is important for studying volcanic clouds in support of aviation safety and for analyzing the effects of volcanoes on global climate.
In this study, we detail an enhanced satellite measurement that provides probability distributions for the altitude and concentration of SO2 instead of single estimates using the Cross-track Infrared Sounder (CrIS) on the Joint Polar Satellite System (JPSS) series of satellites.
This article is included in the Encyclopedia of Geosciences
Andrea Bevilacqua, Abani K. Patra, Marcus I. Bursik, E. Bruce Pitman, José Luis Macías, Ricardo Saucedo, and David Hyman
Nat. Hazards Earth Syst. Sci., 19, 791–820, https://doi.org/10.5194/nhess-19-791-2019, https://doi.org/10.5194/nhess-19-791-2019, 2019
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We introduce a new prediction-oriented method for hazard assessment of volcaniclastic debris flows, based on multiple models. We apply our procedure to a case study of the 1955 Atenquique flow, using three widely used depth-averaged models. Depending on how it is looked at, the exercise provides useful information in either model selection or data inversion. Connecting inverse problems and model uncertainty represents a fundamental challenge in the future development of
multi-model solvers.
This article is included in the Encyclopedia of Geosciences
Zhixuan Cao, Abani Patra, Marcus Bursik, E. Bruce Pitman, and Matthew Jones
Geosci. Model Dev., 11, 2691–2715, https://doi.org/10.5194/gmd-11-2691-2018, https://doi.org/10.5194/gmd-11-2691-2018, 2018
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Plume-SPH provides the first particle-based simulation of volcanic plumes. Smooth particle hydrodynamics used here has several advantages over mesh-based methods for multiphase free boundary flows like volcanic plumes. This tool will provide more accurate eruption source terms to users of volcanic ash transport and dispersion models, greatly improving volcanic ash forecasts. The Plume-SPH code incorporates several newly developed techniques in SPH-needed multiphase compressible turbulent flow.
This article is included in the Encyclopedia of Geosciences
Related subject area
Volcanic Hazards
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SEATANI: hazards from seamounts in Southeast Asia, Taiwan, and Andaman and Nicobar Islands (eastern India)
The 2021 La Palma volcanic eruption and its impact on ionospheric scintillation as measured from GNSS reference stations, GNSS-R and GNSS-RO
Lava flow hazard modeling during the 2021 Fagradalsfjall eruption, Iceland: applications of MrLavaLoba
Assessing long-term tephra fallout hazard in southern Italy from Neapolitan volcanoes
Clustering of eruptive events from high-precision strain signals recorded during the 2020–2022 lava fountains at the Etna volcano (Italy)
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Grain size modulates volcanic ash retention on crop foliage and potential yield loss
Characterizing the evolution of mass flow properties and dynamics through analysis of seismic signals: insights from the 18 March 2007 Mt. Ruapehu lake-breakout lahar
Multi-station automatic classification of seismic signatures from the Lascar volcano database
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Exposure-based risk assessment and emergency management associated with the fallout of large clasts at Mount Etna
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Claudia Elisabeth Wieners and Guðmundur Hálfdanarson
Nat. Hazards Earth Syst. Sci., 24, 2971–2994, https://doi.org/10.5194/nhess-24-2971-2024, https://doi.org/10.5194/nhess-24-2971-2024, 2024
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After the 1783 Laki eruption, excess mortality in Iceland was one-sixth of the population, traditionally explained by famine due to livestock loss. Since 1970, it has been suggested that 1) fluorine poisoning may have contributed to mortality in Iceland and 2) air pollution might have caused excess deaths in both Iceland and Europe. Reviewing contemporary Icelandic demographic data, air pollution simulations, and medical records on fluorosis, we show that evidence for both hypotheses is weak.
This article is included in the Encyclopedia of Geosciences
Andrea Verolino, Su Fen Wee, Susanna F. Jenkins, Fidel Costa, and Adam D. Switzer
Nat. Hazards Earth Syst. Sci., 24, 1203–1222, https://doi.org/10.5194/nhess-24-1203-2024, https://doi.org/10.5194/nhess-24-1203-2024, 2024
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Submarine volcanic eruptions represent the majority of eruptions taking place on Earth. Still, they are vastly understudied worldwide. Here we compile a new dataset and assess the morphology, depth, and height of submarine volcanoes in Southeast Asia and its surroundings to understand their hazard-exposure potential in the region. This study will serve as a stepping stone for future quantitative hazard assessments from submarine eruptions in Southeast Asia and neighbouring countries.
This article is included in the Encyclopedia of Geosciences
Carlos Molina, Badr-Eddine Boudriki Semlali, Guillermo González-Casado, Hyuk Park, and Adriano Camps
Nat. Hazards Earth Syst. Sci., 23, 3671–3684, https://doi.org/10.5194/nhess-23-3671-2023, https://doi.org/10.5194/nhess-23-3671-2023, 2023
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Global navigation satellite system signals are used to measure the perturbations induced in the ionosphere by earthquakes related to volcanic eruptions. The study uses data from ground stations and satellites measuring the signals reflected on the ocean or during radio occultation. The results shows a small correlation, but given the small magnitude of the earthquakes, it is difficult to apply this concept to any practical application that finds earthquake proxies in ionospheric perturbations.
This article is included in the Encyclopedia of Geosciences
Gro B. M. Pedersen, Melissa A. Pfeffer, Sara Barsotti, Simone Tarquini, Mattia de'Michieli Vitturi, Bergrún A. Óladóttir, and Ragnar Heiðar Þrastarson
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The lava eruption at Fagradalsfjall in 2021 was the most visited eruption in Iceland, with thousands of visitors per day for 6 months. To address the short- and long-term danger of lava inundating infrastructure and hiking paths, we used the lava flow model MrLavaLoba before and during the eruption. These simulations helped communicate lava hazards to stakeholders and can be used as a case study for lava hazard assessment for future eruptions in the area, which are likely to be more destructive.
This article is included in the Encyclopedia of Geosciences
Silvia Massaro, Manuel Stocchi, Beatriz Martínez Montesinos, Laura Sandri, Jacopo Selva, Roberto Sulpizio, Biagio Giaccio, Massimiliano Moscatelli, Edoardo Peronace, Marco Nocentini, Roberto Isaia, Manuel Titos Luzón, Pierfrancesco Dellino, Giuseppe Naso, and Antonio Costa
Nat. Hazards Earth Syst. Sci., 23, 2289–2311, https://doi.org/10.5194/nhess-23-2289-2023, https://doi.org/10.5194/nhess-23-2289-2023, 2023
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A new methodology to calculate a probabilistic long-term tephra fallout hazard assessment in southern Italy from the Neapolitan volcanoes is provided. By means of thousands of numerical simulations we quantify the mean annual frequency with which the tephra load at the ground exceeds critical thresholds in 50 years. The output hazard maps account for changes in eruptive regimes of each volcano and are also comparable with those of other natural disasters in which more sources are integrated.
This article is included in the Encyclopedia of Geosciences
Luigi Carleo, Gilda Currenti, and Alessandro Bonaccorso
Nat. Hazards Earth Syst. Sci., 23, 1743–1754, https://doi.org/10.5194/nhess-23-1743-2023, https://doi.org/10.5194/nhess-23-1743-2023, 2023
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Lava fountains at the Etna volcano are explosive eruptions that pose a serious threat to civil infrastructure and aviation. Their evolution from weak explosion to sustained eruptive column is imprinted in tiny ground deformations caught by strain signals with diverse duration and amplitude. By performing a clustering analysis on strain variations, we discover a transition among four eruptive styles, providing useful hints for volcano monitoring and hazard assessment.
This article is included in the Encyclopedia of Geosciences
Evgenia Ilyinskaya, Vésteinn Snæbjarnarson, Hanne Krage Carlsen, and Björn Oddsson
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2023-6, https://doi.org/10.5194/nhess-2023-6, 2023
Revised manuscript accepted for NHESS
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Natural hazards can have negative impacts on mental health. We used artificial intelligence to analyse sentiments expressed by people in Twitter posts during a period of heightened earthquake activity and during a small volcanic eruption in Iceland. We show even small natural hazards which cause no material damage can still have a significant impact on people . The earthquakes had a predominantly negative impact but, somewhat unexpectedly, the eruption seemed to have a positive impact.
This article is included in the Encyclopedia of Geosciences
Noa Ligot, Patrick Bogaert, Sébastien Biass, Guillaume Lobet, and Pierre Delmelle
Nat. Hazards Earth Syst. Sci., 23, 1355–1369, https://doi.org/10.5194/nhess-23-1355-2023, https://doi.org/10.5194/nhess-23-1355-2023, 2023
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Assessing risk to crops from volcanic ashfall is critical to protect people who rely on agriculture for their livelihood and food security. Ash retention on crop leaves is a key process in damage initiation. Experiments with tomato and chilli pepper plants revealed that ash retention increases with decreasing ash grain size and is enhanced when leaves are pubescent or their surfaces are wet. We propose a new relationship to quantify potential crop yield loss as a function of ash retention.
This article is included in the Encyclopedia of Geosciences
Braden Walsh, Charline Lormand, Jon Procter, and Glyn Williams-Jones
Nat. Hazards Earth Syst. Sci., 23, 1029–1044, https://doi.org/10.5194/nhess-23-1029-2023, https://doi.org/10.5194/nhess-23-1029-2023, 2023
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Here, we delve into the properties of a lake-breakout mass flow that grew up to a volume of ~ 4.4 × 106 m3 over the course of 83 km that occurred on 18 March 2007 at Mt. Ruapehu, Aotearoa / New Zealand. The combination of seismic analysis (frequency and directionality) with on-the-ground measurements (e.g., video, sediment concentration) shows how a lahar evolves over time and distance and how using seismic techniques can help monitor the ever-changing dynamics and properties of a flow event.
This article is included in the Encyclopedia of Geosciences
Pablo Salazar, Franz Yupanqui, Claudio Meneses, Susana Layana, and Gonzalo Yáñez
Nat. Hazards Earth Syst. Sci., 23, 991–1006, https://doi.org/10.5194/nhess-23-991-2023, https://doi.org/10.5194/nhess-23-991-2023, 2023
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The acquisition of more generalizable models, using machine learning techniques, creates a good opportunity to develop a multi-volcano probabilistic model for volcanoes worldwide. This will improve the understanding and evaluation of the hazards and risks associated with the activity of volcanoes.
This article is included in the Encyclopedia of Geosciences
Matthew W. Hayward, Emily M. Lane, Colin N. Whittaker, Graham S. Leonard, and William L. Power
Nat. Hazards Earth Syst. Sci., 23, 955–971, https://doi.org/10.5194/nhess-23-955-2023, https://doi.org/10.5194/nhess-23-955-2023, 2023
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In this paper, 20 explosive volcanic eruption scenarios of differing location and magnitude are simulated to investigate tsunami generation in Lake Taupō, New Zealand. A non-hydrostatic multilayer numerical scheme resolves the highly dispersive generated wavefield. Inundation, hydrographic and related hazard outputs are produced, indicating that significant inundation around the lake shore begins above 5 on the volcanic explosivity index.
This article is included in the Encyclopedia of Geosciences
Gui Hu, Linlin Li, Zhiyuan Ren, and Kan Zhang
Nat. Hazards Earth Syst. Sci., 23, 675–691, https://doi.org/10.5194/nhess-23-675-2023, https://doi.org/10.5194/nhess-23-675-2023, 2023
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We explore the tsunamigenic mechanisms and the hydrodynamic characteristics of the 2022 Hunga Tonga–Hunga Ha'apai volcanic tsunami event. Through extensive analysis of tsunami waveforms, we identify four distinct tsunami components from different physical mechanisms. The long-lasting oscillation of the tsunami event in the Pacific Ocean was mainly associated with the interplay of the ocean waves left by atmospheric waves with local bathymetry.
This article is included in the Encyclopedia of Geosciences
Andrea Bevilacqua, Alvaro Aravena, Willy Aspinall, Antonio Costa, Sue Mahony, Augusto Neri, Stephen Sparks, and Brittain Hill
Nat. Hazards Earth Syst. Sci., 22, 3329–3348, https://doi.org/10.5194/nhess-22-3329-2022, https://doi.org/10.5194/nhess-22-3329-2022, 2022
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We evaluate through first-order kinetic energy models, the minimum volume and mass of a pyroclastic density current generated at the Aso caldera that might affect any of five distal infrastructure sites. These target sites are all located 115–145 km from the caldera, but in well-separated directions. Our constraints of volume and mass are then compared with the scale of Aso-4, the largest caldera-forming eruption of Aso.
This article is included in the Encyclopedia of Geosciences
Sébastien Biass, Susanna F. Jenkins, William H. Aeberhard, Pierre Delmelle, and Thomas Wilson
Nat. Hazards Earth Syst. Sci., 22, 2829–2855, https://doi.org/10.5194/nhess-22-2829-2022, https://doi.org/10.5194/nhess-22-2829-2022, 2022
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We present a methodology that combines big Earth observation data and interpretable machine learning to revisit the impact of past volcanic eruptions recorded in archives of multispectral satellite imagery. Using Google Earth Engine and dedicated numerical modelling, we revisit and constrain processes controlling vegetation vulnerability to tephra fallout following the 2011 eruption of Cordón Caulle volcano, illustrating how this approach can inform the development of risk-reduction policies.
This article is included in the Encyclopedia of Geosciences
Maud Devès, Robin Lacassin, Hugues Pécout, and Geoffrey Robert
Nat. Hazards Earth Syst. Sci., 22, 2001–2029, https://doi.org/10.5194/nhess-22-2001-2022, https://doi.org/10.5194/nhess-22-2001-2022, 2022
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This paper focuses on the issue of population information about natural hazards and disaster risk. It builds on the analysis of the unique seismo-volcanic crisis on the island of Mayotte, France, that started in May 2018 and lasted several years. We document the gradual response of the actors in charge of scientific monitoring and risk management. We then make recommendations for improving risk communication strategies in Mayotte and also in contexts where comparable geo-crises may happen.
This article is included in the Encyclopedia of Geosciences
Susanna F. Jenkins, Sébastien Biass, George T. Williams, Josh L. Hayes, Eleanor Tennant, Qingyuan Yang, Vanesa Burgos, Elinor S. Meredith, Geoffrey A. Lerner, Magfira Syarifuddin, and Andrea Verolino
Nat. Hazards Earth Syst. Sci., 22, 1233–1265, https://doi.org/10.5194/nhess-22-1233-2022, https://doi.org/10.5194/nhess-22-1233-2022, 2022
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There is a need for large-scale comparable assessments of volcanic threat, but previous approaches assume circular hazard to exposed population. Our approach quantifies and ranks five exposure types to four volcanic hazards for 40 volcanoes in Southeast Asia. Java has the highest median exposure, with Merapi consistently ranking as the highest-threat volcano. This study and the tools developed provide a road map with the possibility to extend them to other regions and/or towards impact and loss.
This article is included in the Encyclopedia of Geosciences
Costanza Bonadonna, Ali Asgary, Franco Romerio, Tais Zulemyan, Corine Frischknecht, Chiara Cristiani, Mauro Rosi, Chris E. Gregg, Sebastien Biass, Marco Pistolesi, Scira Menoni, and Antonio Ricciardi
Nat. Hazards Earth Syst. Sci., 22, 1083–1108, https://doi.org/10.5194/nhess-22-1083-2022, https://doi.org/10.5194/nhess-22-1083-2022, 2022
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Evacuation planning and management represent a key aspect of volcanic crises because they can increase people's protection as well as minimize the potential impacts on the economy, properties and infrastructure of the affected area. We present a simulation tool that assesses the effectiveness of different evacuation scenarios as well as a model to assess the economic impact of evacuation as a function of evacuation duration and starting period using the island of Vulcano (Italy) as a case study.
This article is included in the Encyclopedia of Geosciences
Luca Bugliaro, Dennis Piontek, Stephan Kox, Marius Schmidl, Bernhard Mayer, Richard Müller, Margarita Vázquez-Navarro, Daniel M. Peters, Roy G. Grainger, Josef Gasteiger, and Jayanta Kar
Nat. Hazards Earth Syst. Sci., 22, 1029–1054, https://doi.org/10.5194/nhess-22-1029-2022, https://doi.org/10.5194/nhess-22-1029-2022, 2022
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The monitoring of ash dispersion in the atmosphere is an important task for satellite remote sensing since ash represents a threat to air traffic. We present an AI-based method that retrieves the spatial extension and properties of volcanic ash clouds with high temporal resolution during day and night by means of geostationary satellite measurements. This algorithm, trained on realistic observations simulated with a radiative transfer model, runs operationally at the German Weather Service.
This article is included in the Encyclopedia of Geosciences
Manuel Titos, Beatriz Martínez Montesinos, Sara Barsotti, Laura Sandri, Arnau Folch, Leonardo Mingari, Giovanni Macedonio, and Antonio Costa
Nat. Hazards Earth Syst. Sci., 22, 139–163, https://doi.org/10.5194/nhess-22-139-2022, https://doi.org/10.5194/nhess-22-139-2022, 2022
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This work addresses a quantitative hazard assessment on the possible impact on air traffic of a future ash-forming eruption on the island of Jan Mayen. Through high-performance computing resources, we numerically simulate the transport of ash clouds and ash concentration at different flight levels over an area covering Iceland and the UK using the FALL3D model. This approach allows us to derive a set of probability maps explaining the extent and persisting concentration conditions of ash clouds.
This article is included in the Encyclopedia of Geosciences
Warner Marzocchi, Jacopo Selva, and Thomas H. Jordan
Nat. Hazards Earth Syst. Sci., 21, 3509–3517, https://doi.org/10.5194/nhess-21-3509-2021, https://doi.org/10.5194/nhess-21-3509-2021, 2021
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Eruption forecasting and volcanic hazard analysis are pervaded by uncertainty of different kinds, such as the natural randomness, our lack of knowledge, and the so-called unknown unknowns. After discussing the limits of how classical probabilistic frameworks handle these uncertainties, we put forward a unified probabilistic framework which unambiguously defines uncertainty of different kinds, and it allows scientific validation of the hazard model against independent observations.
This article is included in the Encyclopedia of Geosciences
Stuart R. Mead, Jonathan Procter, and Gabor Kereszturi
Nat. Hazards Earth Syst. Sci., 21, 2447–2460, https://doi.org/10.5194/nhess-21-2447-2021, https://doi.org/10.5194/nhess-21-2447-2021, 2021
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Computer simulations can be used to estimate the flow path and inundation of volcanic mass flows; however, their accuracy needs to be appropriately measured and handled in order to determine hazard zones. This paper presents an approach to simulation accuracy assessment and hazard zonation with a volcanic debris avalanche as the benchmark. This method helped to identify and support key findings about errors in mass flow simulations, as well as potential end-use cases for hazard zonation.
This article is included in the Encyclopedia of Geosciences
Magdalena Oryaëlle Chevrel, Massimiliano Favalli, Nicolas Villeneuve, Andrew J. L. Harris, Alessandro Fornaciai, Nicole Richter, Allan Derrien, Patrice Boissier, Andrea Di Muro, and Aline Peltier
Nat. Hazards Earth Syst. Sci., 21, 2355–2377, https://doi.org/10.5194/nhess-21-2355-2021, https://doi.org/10.5194/nhess-21-2355-2021, 2021
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At Piton de la Fournaise, eruptions are typically fissure-fed and form extensive lava flow fields. Most historical events have occurred inside an uninhabited caldera, but rarely has lava flowed where population and infrastructure might be at risk. We present an up-to-date lava flow hazard map to visualize the probability of inundation by a lava flow per unit area that is an essential tool for hazard mitigation and guiding crises response management.
This article is included in the Encyclopedia of Geosciences
Andrea Bevilacqua, Alvaro Aravena, Augusto Neri, Eduardo Gutiérrez, Demetrio Escobar, Melida Schliz, Alessandro Aiuppa, and Raffaello Cioni
Nat. Hazards Earth Syst. Sci., 21, 1639–1665, https://doi.org/10.5194/nhess-21-1639-2021, https://doi.org/10.5194/nhess-21-1639-2021, 2021
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We present novel probability maps for the opening position of new vents in the San Salvador (El Salvador) and Nejapa-Chiltepe (Nicaragua) volcanic complexes. In particular, we present thematic maps, i.e., we consider different hazardous phenomena separately. To illustrate the significant effects of considering the expected eruption style in the construction of vent opening maps, we focus on the analysis of small-scale pyroclastic density currents using an approach based on numerical modeling.
This article is included in the Encyclopedia of Geosciences
Joana Medeiros, Rita Carmo, Adriano Pimentel, José Cabral Vieira, and Gabriela Queiroz
Nat. Hazards Earth Syst. Sci., 21, 417–437, https://doi.org/10.5194/nhess-21-417-2021, https://doi.org/10.5194/nhess-21-417-2021, 2021
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This study proposes a new approach to accessing the economic impact of explosive eruptions on the tourism sector on São Miguel Island, which uses the loss present value method to estimate the benefits generated by accommodation units over 30 years for different scenarios. The results reveal that in a near-total-destruction scenario, the economic loss is ~ EUR 145 million. This method can be adapted to other volcanic regions and also to other geological hazards and economic sectors.
This article is included in the Encyclopedia of Geosciences
Carola Leva, Georg Rümpker, and Ingo Wölbern
Nat. Hazards Earth Syst. Sci., 20, 3627–3638, https://doi.org/10.5194/nhess-20-3627-2020, https://doi.org/10.5194/nhess-20-3627-2020, 2020
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Often, an abrupt increase in shallow seismicity at volcanoes is seen as an indicator for magmatic intrusions into the upper crust. If no eruption occurs and the seismic activity stops, this is called a failed eruption. Here, we report a failed eruption of Brava, Cabo Verde, in August 2016. We remotely monitored the seismicity of Brava with a seismic array, operating from October 2015 to December 2016. Other episodes with increased seismicity around the island were also observed during the study.
This article is included in the Encyclopedia of Geosciences
Philipson Bani, Kristianto, Syegi Kunrat, and Devy Kamil Syahbana
Nat. Hazards Earth Syst. Sci., 20, 2119–2132, https://doi.org/10.5194/nhess-20-2119-2020, https://doi.org/10.5194/nhess-20-2119-2020, 2020
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Awu is a little-known volcano in Indonesia, and paradoxically it is one of the deadliest volcanoes on Earth. Some of its recurrent intense eruptions have induced world-scale impacts. The pulverization of a cooled lava dome and its conduit plug have allowed lake water injection into the conduit, leading to explosive water–magma interaction. The past vigorous eruptions were likely induced by these phenomena and it is a possible scenario for future events.
This article is included in the Encyclopedia of Geosciences
Giuseppe De Natale, Claudia Troise, and Renato Somma
Nat. Hazards Earth Syst. Sci., 20, 2037–2053, https://doi.org/10.5194/nhess-20-2037-2020, https://doi.org/10.5194/nhess-20-2037-2020, 2020
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This paper starts by showing the present low performance of eruption forecasting and then addresses the problem of effectively mitigating the highest volcanic risk in the world, represented by the Naples area (southern Italy). The problem is considered in a highly multidisciplinary way, taking into account the main economic, sociological and urban planning issues. Our study gives precise guidelines to assessing and managing volcanic risk in any densely urbanised area.
This article is included in the Encyclopedia of Geosciences
Marcus Hirtl, Delia Arnold, Rocio Baro, Hugues Brenot, Mauro Coltelli, Kurt Eschbacher, Helmut Hard-Stremayer, Florian Lipok, Christian Maurer, Dieter Meinhard, Lucia Mona, Marie D. Mulder, Nikolaos Papagiannopoulos, Michael Pernsteiner, Matthieu Plu, Lennart Robertson, Carl-Herbert Rokitansky, Barbara Scherllin-Pirscher, Klaus Sievers, Mikhail Sofiev, Wim Som de Cerff, Martin Steinheimer, Martin Stuefer, Nicolas Theys, Andreas Uppstu, Saskia Wagenaar, Roland Winkler, Gerhard Wotawa, Fritz Zobl, and Raimund Zopp
Nat. Hazards Earth Syst. Sci., 20, 1719–1739, https://doi.org/10.5194/nhess-20-1719-2020, https://doi.org/10.5194/nhess-20-1719-2020, 2020
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The paper summarizes the set-up and outcome of a volcanic-hazard demonstration exercise, with the goals of assessing and mitigating the impacts of volcanic ash clouds on civil and military aviation. Experts in the field simulated the sequence of procedures for an artificial eruption of the Etna volcano in Italy. The scope of the exercise ranged from the detection of the assumed event to the issuance of early warnings and optimized rerouting of flights.
This article is included in the Encyclopedia of Geosciences
Adrianus de Laat, Margarita Vazquez-Navarro, Nicolas Theys, and Piet Stammes
Nat. Hazards Earth Syst. Sci., 20, 1203–1217, https://doi.org/10.5194/nhess-20-1203-2020, https://doi.org/10.5194/nhess-20-1203-2020, 2020
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TROPOMI satellite measurements can accurately determine the height of thick volcanic ash clouds from a short-lived volcanic eruption of the Sinabung volcano in Indonesia. Standard geostationary satellite detection of volcanic ash was limited due to the presence of water and ice in the upper parts of volcanic ash clouds, a known issue. The TROPOMI satellite measurements do not suffer from this limitation, hence providing information where standard geostationary volcanic ash detection is limited.
This article is included in the Encyclopedia of Geosciences
Ayleen Gaete, Thomas R. Walter, Stefan Bredemeyer, Martin Zimmer, Christian Kujawa, Luis Franco Marin, Juan San Martin, and Claudia Bucarey Parra
Nat. Hazards Earth Syst. Sci., 20, 377–397, https://doi.org/10.5194/nhess-20-377-2020, https://doi.org/10.5194/nhess-20-377-2020, 2020
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Phreatic eruptions often occur without signs of enhanced volcanic unrest, avoiding detection and posing a threat to people in the vicinity. We analyzed data of the 2015 phreatic eruption of Lascar volcano, Chile, to retrospectively identify a precipitation event as the trigger mechanism and potential signs heralding this minor eruption. We showed that it is possible to detect the precursory activity of phreatic eruptions by deploying appropriate multiparametric monitoring.
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Valérie Baumann, Costanza Bonadonna, Sabatino Cuomo, Mariagiovanna Moscariello, Sebastien Biass, Marco Pistolesi, and Alessandro Gattuso
Nat. Hazards Earth Syst. Sci., 19, 2421–2449, https://doi.org/10.5194/nhess-19-2421-2019, https://doi.org/10.5194/nhess-19-2421-2019, 2019
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Lahars are fast-moving mixtures of volcanic debris and water propagating downslope on volcanoes that can be very dangerous for people and property. Identification of lahar source areas and initiation mechanisms is crucial to comprehensive lahar hazard assessment. We present the first rain-triggered lahar susceptibility map for La Fossa volcano (Vulcano, Italy) combining probabilistic tephra modelling, slope-stability modelling, precipitation data, field characterizations, and geotechnical tests.
This article is included in the Encyclopedia of Geosciences
Sophie Mossoux, Matthieu Kervyn, and Frank Canters
Nat. Hazards Earth Syst. Sci., 19, 1251–1263, https://doi.org/10.5194/nhess-19-1251-2019, https://doi.org/10.5194/nhess-19-1251-2019, 2019
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Hazard maps provide information about the probability of given areas of being affected by hazards. So far studies combining hazard mapping with accessibility to services are few. In this study, we propose two new metrics defining the importance of each road segment in the accessibility of services, taking into account the probability of being affected by a hazard. These metrics may help support discussions about the development of new infrastructure or road segments and evacuation procedures.
This article is included in the Encyclopedia of Geosciences
Sara Osman, Eduardo Rossi, Costanza Bonadonna, Corine Frischknecht, Daniele Andronico, Raffaello Cioni, and Simona Scollo
Nat. Hazards Earth Syst. Sci., 19, 589–610, https://doi.org/10.5194/nhess-19-589-2019, https://doi.org/10.5194/nhess-19-589-2019, 2019
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The fallout of large clasts (> 5 cm) from the margins of eruptive plumes can damage local infrastructure and severely injure people close to the volcano. Even though this potential hazard has been observed at many volcanoes, it has often been overlooked. We present the first hazard and risk assessment of large-clast fallout from eruptive plumes and use Mt Etna (Italy) as a case study. The use of dedicated shelters in the case of an explosive event that occurs with no warning is also evaluated.
This article is included in the Encyclopedia of Geosciences
Herlan Darmawan, Thomas R. Walter, Valentin R. Troll, and Agus Budi-Santoso
Nat. Hazards Earth Syst. Sci., 18, 3267–3281, https://doi.org/10.5194/nhess-18-3267-2018, https://doi.org/10.5194/nhess-18-3267-2018, 2018
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At Merapi volcano, lava dome failure may generate pyroclastic flow and threaten populations who live on its flanks. Here, we assessed the potential hazard of the Merapi lava dome by using drone photogrammetry and numerical modeling. Results show a weak structural depression that is associated with high thermal imaging in the southern Merapi lava dome sector. The southern lava dome sector may be further destabilized by typical rainfall at the Merapi summit and produce pyroclastic flow up to 4 km.
This article is included in the Encyclopedia of Geosciences
Stefania Bartolini, Carmen López, Laura Becerril, Rosa Sobradelo, and Joan Martí
Nat. Hazards Earth Syst. Sci., 18, 1759–1770, https://doi.org/10.5194/nhess-18-1759-2018, https://doi.org/10.5194/nhess-18-1759-2018, 2018
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The most challenging aspect of forecasting volcanic eruptions is the correct identification and interpretation of precursors during the episodes that normally precede eruptive activity. We show an easy and useful approach to the understanding of the information recorded by the monitoring system and show how this information can be used to forecast an eruption and its potential hazards in real time. This methodology can be used to facilitate communication between scientists and decision-makers.
This article is included in the Encyclopedia of Geosciences
Elena Gerwing, Matthias Hort, Jörn Behrens, and Bärbel Langmann
Nat. Hazards Earth Syst. Sci., 18, 1517–1534, https://doi.org/10.5194/nhess-18-1517-2018, https://doi.org/10.5194/nhess-18-1517-2018, 2018
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This article describes the first volcanic emission advection model based on an adaptive mesh. The advection of volcanic emissions plays a crucial role in climate research, air traffic control and human wellbeing. In contrast to already existing volcanic emission dispersion models relying on a fixed grid, the application of an adaptive mesh enables us to simulate the advection of volcanic emissions with a high local resolution while minimizing computational cost.
This article is included in the Encyclopedia of Geosciences
Natalie J. Harvey, Nathan Huntley, Helen F. Dacre, Michael Goldstein, David Thomson, and Helen Webster
Nat. Hazards Earth Syst. Sci., 18, 41–63, https://doi.org/10.5194/nhess-18-41-2018, https://doi.org/10.5194/nhess-18-41-2018, 2018
Laura Becerril, Joan Martí, Stefania Bartolini, and Adelina Geyer
Nat. Hazards Earth Syst. Sci., 17, 1145–1157, https://doi.org/10.5194/nhess-17-1145-2017, https://doi.org/10.5194/nhess-17-1145-2017, 2017
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Lanzarote is an island (Canaries, Spain), that has hosted the largest and longest eruption in the archipelago (Timanfaya 1730–36). It brought severe economic losses and forced local people to migrate. We have developed the first comprehensive hazard assessment for the island. New eruptions will take place close to the last one and will be characterised by Strombolian activity, with ash emission towards the S, medium-length lava flows and hydromagmatic activity only close to the coastal areas.
This article is included in the Encyclopedia of Geosciences
Arnau Folch, Jordi Barcons, Tomofumi Kozono, and Antonio Costa
Nat. Hazards Earth Syst. Sci., 17, 861–879, https://doi.org/10.5194/nhess-17-861-2017, https://doi.org/10.5194/nhess-17-861-2017, 2017
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Atmospheric dispersal of a gas denser than air can threat the environment and surrounding communities. In complex terrains, microscale winds and local orographic features can have a strong influence on the gas cloud behavior, potentially leading to inaccurate model results if not captured by coarser-scale simulations. We introduce a methodology for microscale wind field characterization and validate it using, as a test case, the CO2 gas dispersal from 1986 Lake Nyos eruption.
This article is included in the Encyclopedia of Geosciences
Stuart R. Mead, Christina Magill, Vincent Lemiale, Jean-Claude Thouret, and Mahesh Prakash
Nat. Hazards Earth Syst. Sci., 17, 703–719, https://doi.org/10.5194/nhess-17-703-2017, https://doi.org/10.5194/nhess-17-703-2017, 2017
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Volcanic mudflows, called lahars, can cause large amounts of damage to buildings. In this research we developed a method to estimate lahar-induced building damage based on the height, speed and amount of volcanic material in the lahar. This method was applied to a small region in Arequipa, Peru, where computer models were used to estimate the number of buildings affected by lahars. The research found that building location and the size of the flow are most important in determining damage.
This article is included in the Encyclopedia of Geosciences
Werner T. Flueck
Nat. Hazards Earth Syst. Sci., 16, 2351–2355, https://doi.org/10.5194/nhess-16-2351-2016, https://doi.org/10.5194/nhess-16-2351-2016, 2016
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The 2011 Puyehue volcano eruption also caused persisting chemical impacts. By 2012, dental fluorosis in deer appeared, with bone fluoride increasing > 38-fold. Livestock also succumbed to fluorosis. As exposure of ruminants continued, bone fluoride reached 10 396 ppm, by 2014 caused skeletal fluorosis, reduced wool growth, and caused major losses among periparturient cattle. Peculiarities of digestive processes make ruminants susceptible to fluoride-containing ashes.
This article is included in the Encyclopedia of Geosciences
Ana Graciela Ulke, Marcela M. Torres Brizuela, Graciela B. Raga, and Darrel Baumgardner
Nat. Hazards Earth Syst. Sci., 16, 2159–2175, https://doi.org/10.5194/nhess-16-2159-2016, https://doi.org/10.5194/nhess-16-2159-2016, 2016
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The eruption in June 2011 of the Puyehue-Cordón Caulle Volcanic Complex (Chile) impacted air traffic around the Southern Hemisphere for several months. The ash deposited in vast areas of the Patagonian steppe was subjected to the strong wind conditions prevalent during the austral winter and spring. An ash resuspension event impacted Buenos Aires and resulted in the closure of airports in the area on 16 October 2011. Measurements of aerosol properties clearly indicate the enhanced concentrations
This article is included in the Encyclopedia of Geosciences
Nicole Richter, Massimiliano Favalli, Elske de Zeeuw-van Dalfsen, Alessandro Fornaciai, Rui Manuel da Silva Fernandes, Nemesio M. Pérez, Judith Levy, Sónia Silva Victória, and Thomas R. Walter
Nat. Hazards Earth Syst. Sci., 16, 1925–1951, https://doi.org/10.5194/nhess-16-1925-2016, https://doi.org/10.5194/nhess-16-1925-2016, 2016
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We provide a comprehensive lava flow hazard assessment for Fogo volcano, Cabo Verde before and after the 2014–2015 eruption based on probabilistic lava flow simulations. We find that the probability of lava flow invasion has not decreased at the location of two villages that were destroyed during this eruption, but have already started to be rebuilt. Our findings will be important for the next eruption of Fogo volcano and have implications for future lava flow crises elsewhere in the world.
This article is included in the Encyclopedia of Geosciences
Rosario Vázquez, Lucia Capra, and Velio Coviello
Nat. Hazards Earth Syst. Sci., 16, 1881–1895, https://doi.org/10.5194/nhess-16-1881-2016, https://doi.org/10.5194/nhess-16-1881-2016, 2016
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We present the morphological changes experienced by Montegrande ravine (Volcán de Colima, Mexico) during the 2013, 2014 and 2015 rainy seasons. A total of 11 lahars occurred during this period of time, and their erosion/deposition effects were quantified by means of cross sections and rainfall analysis. The major factors controlling the E/D rates are the channel-bed slope, the cross-section width, the flow depth and the joint effect of sediment availability and accumulated rainfall.
This article is included in the Encyclopedia of Geosciences
Alessandro Bonforte, Douglas Antonio Hernandez, Eduardo Gutiérrez, Louis Handal, Cecilia Polío, Salvatore Rapisarda, and Piergiorgio Scarlato
Nat. Hazards Earth Syst. Sci., 16, 1755–1769, https://doi.org/10.5194/nhess-16-1755-2016, https://doi.org/10.5194/nhess-16-1755-2016, 2016
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In this paper, we present the work done during an international cooperation between Italy and El Salvador, for implementing the multiparametric monitoring of the San Miguel volcano in El Salvador after its sudden unrest. In particular, the aim of this paper is to show and describe the installed geodetic network and to show, comment and interpret the very first detailed ground deformation data obtained on this volcano during an unrest period, useful for characterizing its unknown dynamics.
This article is included in the Encyclopedia of Geosciences
Lara Mani, Paul D. Cole, and Iain Stewart
Nat. Hazards Earth Syst. Sci., 16, 1673–1689, https://doi.org/10.5194/nhess-16-1673-2016, https://doi.org/10.5194/nhess-16-1673-2016, 2016
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Here, we aim to better understand the potential for using video games in volcanic hazard education with at-risk communities. A study using a bespoke-designed video game – St. Vincent's Volcano – was trialled on the Caribbean island of St. Vincent in 2015. Preliminary data analysis demonstrates 94 % of study participants had an improved knowledge of volcanic hazards after playing the game, leading us to conclude that video games could be a logical progression for education and outreach activities.
This article is included in the Encyclopedia of Geosciences
Alicia García, Servando De la Cruz-Reyna, José M. Marrero, and Ramón Ortiz
Nat. Hazards Earth Syst. Sci., 16, 1135–1144, https://doi.org/10.5194/nhess-16-1135-2016, https://doi.org/10.5194/nhess-16-1135-2016, 2016
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Earthquakes of volcanic origin (VT) represent a significant hazard in volcanic islands prone to landslides. We present a methodology to forecast large VT earthquakes during volcanic crises based on an algorithm that translates fluctuations of the level of seismicity into 10-day time windows of increased probability of a major event. This algorithm has been successfully applied during the 2011–2013 volcanic crisis at El Hierro (Canary Islands).
This article is included in the Encyclopedia of Geosciences
Boris M. Shevtsov, Pavel P. Firstov, Nina V. Cherneva, Robert H. Holzworth, and Renat R. Akbashev
Nat. Hazards Earth Syst. Sci., 16, 871–874, https://doi.org/10.5194/nhess-16-871-2016, https://doi.org/10.5194/nhess-16-871-2016, 2016
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The Kamchatka volcano group is located near populated areas and international air routes. Due to this, explosive eruptions are a serious threat to their security. To decrease the risks, effective systems for remote detection of eruptions are necessary. WWLLN resolution is enough for the remote sensing of the volcano lightning activity in the early stage of ash cloud formation a few minutes after the eruption when electrification proceeds the most intensively.
This article is included in the Encyclopedia of Geosciences
Manuela Elissondo, Valérie Baumann, Costanza Bonadonna, Marco Pistolesi, Raffaello Cioni, Antonella Bertagnini, Sébastien Biass, Juan-Carlos Herrero, and Rafael Gonzalez
Nat. Hazards Earth Syst. Sci., 16, 675–704, https://doi.org/10.5194/nhess-16-675-2016, https://doi.org/10.5194/nhess-16-675-2016, 2016
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We present a chronological reconstruction of the 2011 eruption of Puyehue-Cordón Caulle volcano (Chile) which significantly affected the ecosystem and important economic sectors. The comparison with the impact associated with other recent eruptions located in similar areas shows that the regions downwind of the erupting volcanoes suffered similar problems, suggesting that a detailed collection of impact data can be largely beneficial for the development of emergency and risk-mitigation plans.
This article is included in the Encyclopedia of Geosciences
D. Andronico and P. Del Carlo
Nat. Hazards Earth Syst. Sci., 16, 29–40, https://doi.org/10.5194/nhess-16-29-2016, https://doi.org/10.5194/nhess-16-29-2016, 2016
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The paper focuses on the potential health risks caused by the sub-10 micron fraction of volcanic ash (PM10) following explosive eruptions of Mt. Etna (Italy). We present the results of a study on the ash concentration in the air of urbanized areas after the 15 November 2011 lava fountain and the related tephra fallout, causing high levels of PM10 in the air. We conclude by hoping that due attention will be given to the impact of ash fallout on the Etnean territory in the future.
This article is included in the Encyclopedia of Geosciences
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Short summary
In this work, we present new methods for calculating the mean, standard deviation, median, and modal locations of the boundaries of volcanic hazards. These calculations are based on a new, mathematically rigorous definition of probabilistic hazard maps – a way to map the probabilities of inundation by a given hazard. We apply this analysis to several models of volcanic flows: simple models of viscous flows, complex models of a tabletop granular flow, and a complex model of a volcanic mud flow.
In this work, we present new methods for calculating the mean, standard deviation, median, and...
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