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.
Research article
| 
08 Jul 2019
Research article |
| 08 Jul 2019
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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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.
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This article is included in the Encyclopedia of Geosciences
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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
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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
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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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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.
This article is included in the Encyclopedia of Geosciences
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
A. M. Syavulisembo, H.-B. Havenith, B. Smets, N. d'Oreye, and J. Marti
Nat. Hazards Earth Syst. Sci., 15, 2391–2400, https://doi.org/10.5194/nhess-15-2391-2015, https://doi.org/10.5194/nhess-15-2391-2015, 2015
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The Virunga area in the Democratic Republic of the Congo, with over 1 million inhabitants, has to permanently cope with the threat posed by the active Nyamulagira and Nyiragongo volcanoes. During the past century, Nyamulagira erupted at intervals of about every 3 years – mostly in the form of lava flows – at least 30 times. In order to identify a useful tool for hazard assessment at the Goma Volcanological Observatory, we tested VORIS, a freely available software (www.gvb-csic.es).
This article is included in the Encyclopedia of Geosciences
G. Córdoba, G. Villarosa, M. F. Sheridan, J. G. Viramonte, D. Beigt, and G. Salmuni
Nat. Hazards Earth Syst. Sci., 15, 757–766, https://doi.org/10.5194/nhess-15-757-2015, https://doi.org/10.5194/nhess-15-757-2015, 2015
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This paper shows the results of secondary lahar modelling in Villa La Angostura town (Neuquén-Argentina) based on the Two-Phase-Titan modelling computer code.
Possible occurrence of secondary lahars that could reach the city was analysed. The procedure allowed simulation of the path of flows from Florencia, Las Piedritas and Colorado creeks, which are the most influential streams in Villa La Angostura. The output of the modelling is a valuable tool for city planning and risk management.
This article is included in the Encyclopedia of Geosciences
R. Tonini, L. Sandri, A. Costa, and J. Selva
Nat. Hazards Earth Syst. Sci., 15, 409–415, https://doi.org/10.5194/nhess-15-409-2015, https://doi.org/10.5194/nhess-15-409-2015, 2015
L. Caballero and L. Capra
Nat. Hazards Earth Syst. Sci., 14, 3345–3355, https://doi.org/10.5194/nhess-14-3345-2014, https://doi.org/10.5194/nhess-14-3345-2014, 2014
S. Biass, C. Scaini, C. Bonadonna, A. Folch, K. Smith, and A. Höskuldsson
Nat. Hazards Earth Syst. Sci., 14, 2265–2287, https://doi.org/10.5194/nhess-14-2265-2014, https://doi.org/10.5194/nhess-14-2265-2014, 2014
C. Scaini, S. Biass, A. Galderisi, C. Bonadonna, A. Folch, K. Smith, and A. Höskuldsson
Nat. Hazards Earth Syst. Sci., 14, 2289–2312, https://doi.org/10.5194/nhess-14-2289-2014, https://doi.org/10.5194/nhess-14-2289-2014, 2014
L. Becerril, S. Bartolini, R. Sobradelo, J. Martí, J. M. Morales, and I. Galindo
Nat. Hazards Earth Syst. Sci., 14, 1853–1870, https://doi.org/10.5194/nhess-14-1853-2014, https://doi.org/10.5194/nhess-14-1853-2014, 2014
H. Brenot, N. Theys, L. Clarisse, J. van Geffen, J. van Gent, M. Van Roozendael, R. van der A, D. Hurtmans, P.-F. Coheur, C. Clerbaux, P. Valks, P. Hedelt, F. Prata, O. Rasson, K. Sievers, and C. Zehner
Nat. Hazards Earth Syst. Sci., 14, 1099–1123, https://doi.org/10.5194/nhess-14-1099-2014, https://doi.org/10.5194/nhess-14-1099-2014, 2014
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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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