Articles | Volume 22, issue 8
Nat. Hazards Earth Syst. Sci., 22, 2807–2827, 2022
https://doi.org/10.5194/nhess-22-2807-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Nat. Hazards Earth Syst. Sci., 22, 2807–2827, 2022
https://doi.org/10.5194/nhess-22-2807-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
26 Aug 2022
Research article
| 26 Aug 2022
An updated area-source seismogenic model (MA4) for seismic hazard of Italy
Francesco Visini et al.
Related authors
Silvia Pondrelli, Francesco Visini, Andrea Rovida, Vera D'Amico, Bruno Pace, and Carlo Meletti
Nat. Hazards Earth Syst. Sci., 20, 3577–3592, https://doi.org/10.5194/nhess-20-3577-2020, https://doi.org/10.5194/nhess-20-3577-2020, 2020
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We used 100 years of seismicity in Italy to predict the hypothetical tectonic style of future earthquakes, with the purpose of using this information in a new seismic hazard model. To squeeze all possible information out of the available data, we created a chain of criteria to be applied in the input and output selection processes. The result is a list of cases from very clear ones, e.g., extensional tectonics in the central Apennines, to completely random tectonics for future seismic events.
Bruno Pace, Francesco Visini, Oona Scotti, and Laura Peruzza
Nat. Hazards Earth Syst. Sci., 18, 1349–1350, https://doi.org/10.5194/nhess-18-1349-2018, https://doi.org/10.5194/nhess-18-1349-2018, 2018
Alessandro Valentini, Francesco Visini, and Bruno Pace
Nat. Hazards Earth Syst. Sci., 17, 2017–2039, https://doi.org/10.5194/nhess-17-2017-2017, https://doi.org/10.5194/nhess-17-2017-2017, 2017
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In this paper, we present the results of an alternative seismogenic source model for use in a probabilistic seismic hazard assessment for Italy that integrates active fault and seismological data. Combining active faults and background sources is one of the key aspects in this type of approach. The strength of our approach lies in its ability to integrate different levels of available information for active faults in Italy or elsewhere.
Andrea Rovida, Andrea Antonucci, and Mario Locati
Earth Syst. Sci. Data, 14, 5213–5231, https://doi.org/10.5194/essd-14-5213-2022, https://doi.org/10.5194/essd-14-5213-2022, 2022
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EPICA is the 1000–1899 catalogue compiled for the European Seismic Hazard Model 2020 and contains 5703 earthquakes with Mw ≥ 4.0. It relies on the data of the European Archive of Historical Earthquake Data (AHEAD), both macroseismic intensities from historical seismological studies and parameters from regional catalogues. For each earthquake, the most representative datasets were selected and processed in order to derive harmonised parameters, both from intensity data and parametric catalogues.
Andrea Antonucci, Andrea Rovida, Vera D'Amico, and Dario Albarello
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2022-216, https://doi.org/10.5194/nhess-2022-216, 2022
Revised manuscript under review for NHESS
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The earthquake effects undocumented at 228 Italian localities were calculated through a probabilistic approach starting from the values obtained through the use of an intensity prediction equation taking into account the intensity data documented at close localities for a given earthquake. The results showed some geographical dependences and correlations with the intensity levels investigated.
Andrea Antonucci, Andrea Rovida, Vera D'Amico, and Dario Albarello
Nat. Hazards Earth Syst. Sci., 21, 2299–2311, https://doi.org/10.5194/nhess-21-2299-2021, https://doi.org/10.5194/nhess-21-2299-2021, 2021
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We present a probabilistic approach for integrating incomplete intensity distributions by means of the Bayesian combination of estimates provided by intensity prediction equations (IPEs) and data documented at nearby localities, accounting for the relevant uncertainties. The performance of the proposed methodology is tested at 28 Italian localities with long and rich seismic histories and for the strong 1980 and 2009 earthquakes in Italy. An application of this approach is also illustrated.
Silvia Pondrelli, Francesco Visini, Andrea Rovida, Vera D'Amico, Bruno Pace, and Carlo Meletti
Nat. Hazards Earth Syst. Sci., 20, 3577–3592, https://doi.org/10.5194/nhess-20-3577-2020, https://doi.org/10.5194/nhess-20-3577-2020, 2020
Short summary
Short summary
We used 100 years of seismicity in Italy to predict the hypothetical tectonic style of future earthquakes, with the purpose of using this information in a new seismic hazard model. To squeeze all possible information out of the available data, we created a chain of criteria to be applied in the input and output selection processes. The result is a list of cases from very clear ones, e.g., extensional tectonics in the central Apennines, to completely random tectonics for future seismic events.
Laura Petrescu, Silvia Pondrelli, Simone Salimbeni, Manuele Faccenda, and the AlpArray Working Group
Solid Earth, 11, 1275–1290, https://doi.org/10.5194/se-11-1275-2020, https://doi.org/10.5194/se-11-1275-2020, 2020
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To place constraints on the mantle deformation beneath the Central Alps and the greater Alpine region, we analysed the appropriate seismic signal recorded by more than 100 stations, belonging to AlpArray and to other permanent networks. We took a picture of the imprinting that Alpine orogen history and related subductions left at depth, with a mainly orogen-parallel mantle deformation from Western Alps to Eastern Alps, but also N to S from the Po Plain to the Rhine Graben.
Bruno Pace, Francesco Visini, Oona Scotti, and Laura Peruzza
Nat. Hazards Earth Syst. Sci., 18, 1349–1350, https://doi.org/10.5194/nhess-18-1349-2018, https://doi.org/10.5194/nhess-18-1349-2018, 2018
Alessandro Valentini, Francesco Visini, and Bruno Pace
Nat. Hazards Earth Syst. Sci., 17, 2017–2039, https://doi.org/10.5194/nhess-17-2017-2017, https://doi.org/10.5194/nhess-17-2017-2017, 2017
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In this paper, we present the results of an alternative seismogenic source model for use in a probabilistic seismic hazard assessment for Italy that integrates active fault and seismological data. Combining active faults and background sources is one of the key aspects in this type of approach. The strength of our approach lies in its ability to integrate different levels of available information for active faults in Italy or elsewhere.
Laura Peruzza, Raffaele Azzaro, Robin Gee, Salvatore D'Amico, Horst Langer, Giuseppe Lombardo, Bruno Pace, Marco Pagani, Francesco Panzera, Mario Ordaz, Miguel Leonardo Suarez, and Giuseppina Tusa
Nat. Hazards Earth Syst. Sci., 17, 1999–2015, https://doi.org/10.5194/nhess-17-1999-2017, https://doi.org/10.5194/nhess-17-1999-2017, 2017
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It is well known that volcanoes and earthquakes are associated, and some active volcanoes cause damaging earthquakes. Nonetheless, volcanoes usually are not pinpointed on a hazard map, as the effects of shallow, volcanic earthquakes can be overshadowed by stronger tectonic earthquakes in the region, particularly when long exposure periods are considered. In this study we faced some challenges with software implementations and original concept scheme for an original PSHA at Mt. Etna, Italy.
Raffaele Azzaro, Graziella Barberi, Salvatore D'Amico, Bruno Pace, Laura Peruzza, and Tiziana Tuvè
Nat. Hazards Earth Syst. Sci., 17, 1981–1998, https://doi.org/10.5194/nhess-17-1981-2017, https://doi.org/10.5194/nhess-17-1981-2017, 2017
Aladino Govoni, Luciana Bonatto, Marco Capello, Adriano Cavaliere, Claudio Chiarabba, Ezio D'Alema, Stefania Danesi, Sara Lovati, Lucia Margheriti, Marco Massa, Salvatore Mazza, Francesco Mazzarini, Stephen Monna, Milena Moretti, Anna Nardi, Davide Piccinini, Claudia Piromallo, Silvia Pondrelli, Simone Salimbeni, Enrico Serpelloni, Stefano Solarino, Massimiliano Vallocchia, Marco Santulin, and the AlpArray Working Group
Adv. Geosci., 43, 39–52, https://doi.org/10.5194/adgeo-43-39-2017, https://doi.org/10.5194/adgeo-43-39-2017, 2017
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We describe here the contribution of Istituto Nazionale di Geofisica e Vulcanolgia (INGV) to the AlpArray Seismic Network (AASN) in the framework of the AlpArray project (http://www.alparray.ethz.ch), a large European collaborative research initiative.
The aim of AlpArray is carrying out cutting edge research to advance our understanding of the deep structure, geodynamics, tectonics and seismic hazard of the greater Alpine area (Alps-Apennines-Carpathians-Dinarides orogenic system).
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Brief communication: The crucial assessment of possible significant vertical movements preceding the 28 December 1908, Mw = 7.1, Messina Straits earthquake
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A web-GIS database of the scientific articles on earthquake-triggered landslides
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Pseudo-prospective testing of 5-year earthquake forecasts for California using inlabru
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Seismic risk scenarios for the residential buildings in the Sabana Centro province in Colombia
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Lixin Wu, Yuan Qi, Wenfei Mao, Jingchen Lu, Yifan Ding, Boqi Peng, and Busheng Xie
Nat. Hazards Earth Syst. Sci., 23, 231–249, https://doi.org/10.5194/nhess-23-231-2023, https://doi.org/10.5194/nhess-23-231-2023, 2023
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Multiple seismic anomalies were reported to be related to the 2015 Nepal earthquake. By sufficiently investigating both the space–time features and the physical models of the seismic anomalies, the coupling mechanisms of these anomalies in 3D space were revealed and an integrated framework to strictly root the sources of various anomalies was proposed. This study provides a practical solution for scrutinizing reliable seismic anomalies from diversified earthquake observations.
David Montiel-López, Sergio Molina, Juan José Galiana-Merino, and Igor Gómez
Nat. Hazards Earth Syst. Sci., 23, 91–106, https://doi.org/10.5194/nhess-23-91-2023, https://doi.org/10.5194/nhess-23-91-2023, 2023
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One of the most effective ways to describe the seismicity of a region is to map the b-value parameter of the Gutenberg-Richter law. This research proposes the study of the spatial cell-event distance distribution to define the smoothing kernel that controls the influence of the data. The results of this methodology depict tectonic stress changes before and after intense earthquakes happen, so it could enable operational earthquake forecasting (OEF) and tectonic source profiling.
Pierre Henry, M. Sinan Özeren, Nurettin Yakupoğlu, Ziyadin Çakir, Emmanuel de Saint-Léger, Olivier Desprez de Gésincourt, Anders Tengberg, Cristele Chevalier, Christos Papoutsellis, Nazmi Postacıoğlu, Uğur Dogan, Hayrullah Karabulut, Gülsen Uçarkuş, and M. Namık Çağatay
Nat. Hazards Earth Syst. Sci., 22, 3939–3956, https://doi.org/10.5194/nhess-22-3939-2022, https://doi.org/10.5194/nhess-22-3939-2022, 2022
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Seafloor instruments at the bottom of the Sea of Marmara recorded disturbances caused by earthquakes, addressing the minimum magnitude that may be recorded in the sediment. A magnitude 4.7 earthquake caused turbidity but little current. A magnitude 5.8 earthquake caused a mudflow and strong currents that spread sediment on the seafloor over several kilometers. However, most known earthquake deposits in the Sea of Marmara spread over larger zones and should correspond to larger earthquakes.
Nicola Alessandro Pino
Nat. Hazards Earth Syst. Sci., 22, 3787–3792, https://doi.org/10.5194/nhess-22-3787-2022, https://doi.org/10.5194/nhess-22-3787-2022, 2022
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The 1908 Messina Straits earthquake is one of the most severe seismic catastrophes in human history and is periodically back in the public discussion because of a project of building a bridge across the Straits. Some models proposed for the fault assume precursory subsidence preceding the quake, resulting in a structure significantly different from the previously debated ones and important hazard implications. The analysis of the historical sea level data allows the rejection of this hypothesis.
Jack N. Williams, Luke N. J. Wedmore, Åke Fagereng, Maximilian J. Werner, Hassan Mdala, Donna J. Shillington, Christopher A. Scholz, Folarin Kolawole, Lachlan J. M. Wright, Juliet Biggs, Zuze Dulanya, Felix Mphepo, and Patrick Chindandali
Nat. Hazards Earth Syst. Sci., 22, 3607–3639, https://doi.org/10.5194/nhess-22-3607-2022, https://doi.org/10.5194/nhess-22-3607-2022, 2022
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We use geologic and GPS data to constrain the magnitude and frequency of earthquakes that occur along active faults in Malawi. These faults slip in earthquakes as the tectonic plates on either side of the East African Rift in Malawi diverge. Low divergence rates (0.5–1.5 mm yr) and long faults (5–200 km) imply that earthquakes along these faults are rare (once every 1000–10 000 years) but could have high magnitudes (M 7–8). These data can be used to assess seismic risk in Malawi.
Mohamadreza Hosseini and Habib Rahimi
Nat. Hazards Earth Syst. Sci., 22, 3571–3583, https://doi.org/10.5194/nhess-22-3571-2022, https://doi.org/10.5194/nhess-22-3571-2022, 2022
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Earthquakes, not only because of earth-shaking but also because of surface ruptures, are a serious threat to many human activities. Reducing earthquake losses and damage requires predicting the amplitude and location of ground movements and possible surface displacements in the future. Using the probabilistic approach and earthquake method, the surface displacement of the north Tabriz fault has been investigated, and the possible displacement in different scenarios has been estimated.
Luca Schilirò, Mauro Rossi, Federica Polpetta, Federica Fiorucci, Carolina Fortunato, and Paola Reichenbach
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2022-265, https://doi.org/10.5194/nhess-2022-265, 2022
Revised manuscript accepted for NHESS
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We present a database of the main scientific articles published in the last four decades on earthquake-triggered landslides (EQTLs) theme. To enhance data view, the articles were catalogued into a web-GIS, which was specifically designed to show different types of information, such as bibliometric information, relevant topic/sub-topic category(s) and addressed earthquake(s). Such information can be useful to get a general overview of the topic, especially for a broad readership.
Maria Francesca Ferrario
Nat. Hazards Earth Syst. Sci., 22, 3527–3542, https://doi.org/10.5194/nhess-22-3527-2022, https://doi.org/10.5194/nhess-22-3527-2022, 2022
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I mapped over 5000 landslides triggered by a moment magnitude 6.0 earthquake that occurred in 2015 in the Sabah region (Malaysia). I analyzed their number, dimension and spatial distribution by dividing the territory into 1 km2 cells. I applied the Environmental Seismic Intensity (ESI-07) scale, which allows the categorization of earthquake damage due to environmental effects. The presented approach promotes the collaboration among the experts in landslide mapping and in ESI-07 assignment.
Kirsty Bayliss, Mark Naylor, Farnaz Kamranzad, and Ian Main
Nat. Hazards Earth Syst. Sci., 22, 3231–3246, https://doi.org/10.5194/nhess-22-3231-2022, https://doi.org/10.5194/nhess-22-3231-2022, 2022
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We develop probabilistic earthquake forecasts that include different spatial information (e.g. fault locations, strain rate) using a point process method. The performance of these models is tested over three different periods and compared with existing forecasts. We find that our models perform well, with those using simulated catalogues that make use of uncertainty in model parameters performing better, demonstrating potential to improve earthquake forecasting using Bayesian approaches.
Chiara Varone, Gianluca Carbone, Anna Baris, Maria Chiara Caciolli, Stefania Fabozzi, Carolina Fortunato, Iolanda Gaudiosi, Silvia Giallini, Marco Mancini, Luca Paolella, Maurizio Simionato, Pietro Sirianni, Roseline Spacagna, Francesco Stigliano, Daniel Tentori, Luca Martelli, Giuseppe Modoni, and Massimiliano Moscatelli
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2022-240, https://doi.org/10.5194/nhess-2022-240, 2022
Revised manuscript accepted for NHESS
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In 2012, Italy was struck by a seismic crisis characterized by two main shocks and relevant liquefaction events.Terre del Reno is one of the municipalities that experienced the most extensive liquefaction effects, thus it was chosen as case study for a project devoted to defining a new methodology to assess the liquefaction susceptibility. In this framework, 1800 geotechnical, geophysical and hydrogeological investigations were collected and stored in the publicly available PERL dataset.
Mariana Belferman, Amotz Agnon, Regina Katsman, and Zvi Ben-Avraham
Nat. Hazards Earth Syst. Sci., 22, 2553–2565, https://doi.org/10.5194/nhess-22-2553-2022, https://doi.org/10.5194/nhess-22-2553-2022, 2022
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Internal fluid pressure in pores leads to breaking. With this mechanical principle and a correlation between historical water level changes and seismicity, we explore possible variants for water level reconstruction in the Dead Sea basin. Using the best-correlated variant, an additional indication is established regarding the location of historical earthquakes. This leads us to propose a certain forecast for the next earthquake in view of the fast and persistent dropping level of the Dead Sea.
Xuezhong Chen, Yane Li, and Lijuan Chen
Nat. Hazards Earth Syst. Sci., 22, 2543–2551, https://doi.org/10.5194/nhess-22-2543-2022, https://doi.org/10.5194/nhess-22-2543-2022, 2022
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When the tectonic stress in the crust increases, the b value will decrease, meaning the effects of tidal stresses are enhanced gradually. Increase in the tidal Coulomb failure stress might promote the occurrence of earthquakes, whereas its decrease could have an opposite effect. This observation may provide an insight into the processes leading to the Wenchuan earthquake and its precursors.
Fabrizio Marra, Alberto Frepoli, Dario Gioia, Marcello Schiattarella, Andrea Tertulliani, Monica Bini, Gaetano De Luca, and Marco Luppichini
Nat. Hazards Earth Syst. Sci., 22, 2445–2457, https://doi.org/10.5194/nhess-22-2445-2022, https://doi.org/10.5194/nhess-22-2445-2022, 2022
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Through the analysis of the morphostructural setting in which the seismicity of Rome is framed, we explain why the city should not expect to suffer damage from a big earthquake.
Chengjun Feng, Guangliang Gao, Shihuai Zhang, Dongsheng Sun, Siyu Zhu, Chengxuan Tan, and Xiaodong Ma
Nat. Hazards Earth Syst. Sci., 22, 2257–2287, https://doi.org/10.5194/nhess-22-2257-2022, https://doi.org/10.5194/nhess-22-2257-2022, 2022
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We show how FSP (Fault Slip Potential) software can be used in quantitative screening to estimate the fault slip potential in a region with some uncertainties in the ambient stress field and to assess the reactivation potential on these faults of presumably higher criticality in response to fluid injection. The case study of the Matouying enhanced geothermal system (EGS) field has important implications for deep geothermal exploitation in China, especially for the Gonghe EGS in Qinghai Province.
Patrick Oswald, Michael Strasser, Jens Skapski, and Jasper Moernaut
Nat. Hazards Earth Syst. Sci., 22, 2057–2079, https://doi.org/10.5194/nhess-22-2057-2022, https://doi.org/10.5194/nhess-22-2057-2022, 2022
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This study provides the first regional earthquake catalogue of the eastern Alps spanning 16 000 years by using three lake paleoseismic records. Recurrence statistics reveal that earthquakes recur every 1000–2000 years in an aperiodic pattern. The magnitudes of paleo-earthquakes exceed the historically documented values. This study estimates magnitude and source areas for severe paleo-earthquakes, and their shaking effects are explored in the broader study area.
Haoyu Wen, Hong-Jia Chen, Chien-Chih Chen, Massimo Pica Ciamarra, and Siew Ann Cheong
Nat. Hazards Earth Syst. Sci., 22, 1931–1954, https://doi.org/10.5194/nhess-22-1931-2022, https://doi.org/10.5194/nhess-22-1931-2022, 2022
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Recently, there has been growing interest from earth scientists to use the electric field deep underground to forecast earthquakes. We go one step further by using the electric fields, which can be directly measured, to separate/classify time periods with two labels only according to the statistical properties of the electric fields. By checking against historical earthquake records, we found time periods covered by one of the two labels to have significantly more frequent earthquakes.
Karma Tempa, Komal Raj Aryal, Nimesh Chettri, Giovanni Forte, and Dipendra Gautam
Nat. Hazards Earth Syst. Sci., 22, 1893–1909, https://doi.org/10.5194/nhess-22-1893-2022, https://doi.org/10.5194/nhess-22-1893-2022, 2022
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This paper performs site response analysis and studies soil amplification for Bhutan Himalaya. A sensitivity study is performed to assess the effect of variation in strong ground motion.
Tayeb Smail, Mohamed Abed, Ahmed Mebarki, and Milan Lazecky
Nat. Hazards Earth Syst. Sci., 22, 1609–1625, https://doi.org/10.5194/nhess-22-1609-2022, https://doi.org/10.5194/nhess-22-1609-2022, 2022
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The Sentinel-1 SAR datasets and Sentinel-2 data are used in this study to investigate the impact of natural hazards (earthquakes and landslides) on struck areas. In InSAR processing, the use of DInSAR, CCD methods, and the LiCSBAS tool permit generation of time-series analysis of ground changes. Three land failures were detected in the study area. CCD is suitable to map landslides that may remain undetected using DInSAR. In Grarem, the failure rim is clear in coherence and phase maps.
Jonatan Glehman and Michael Tsesarsky
Nat. Hazards Earth Syst. Sci., 22, 1451–1467, https://doi.org/10.5194/nhess-22-1451-2022, https://doi.org/10.5194/nhess-22-1451-2022, 2022
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Due to an insufficient number of recorded moderate–strong earthquakes in Israel, estimating the ground motions and the subsequent seismic hazard mitigation becomes a challenge. To fill this gap, we performed a series of 3-D numerical simulations of moderate and moderate–strong earthquakes. We examined the ground motions and their variability through a self-developed statistical model. However, the model cannot fully capture the ground motion variability due to the local seismotectonic setting.
Federico Mori, Amerigo Mendicelli, Gaetano Falcone, Gianluca Acunzo, Rose Line Spacagna, Giuseppe Naso, and Massimiliano Moscatelli
Nat. Hazards Earth Syst. Sci., 22, 947–966, https://doi.org/10.5194/nhess-22-947-2022, https://doi.org/10.5194/nhess-22-947-2022, 2022
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This work addresses the problem of the ground motion estimation over large areas as an important tool for seismic-risk reduction policies. In detail, the near-real-time estimation of ground motion is a key issue for emergency system management. Starting from this consideration, the present work proposes the application of a machine learning approach to produce ground motion maps, using nine input proxies. Such proxies consider seismological, geophysical, and morphological parameters.
Dirsa Feliciano, Orlando Arroyo, Tamara Cabrera, Diana Contreras, Jairo Andrés Valcárcel Torres, and Juan Camilo Gómez Zapata
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2022-73, https://doi.org/10.5194/nhess-2022-73, 2022
Revised manuscript under review for NHESS
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This article presents the number of damaged buildings and calculates the costs for an earthquake in Sabana Centro, a region of eleven towns in Colombia.
Margarida Ramalho, Luis Matias, Marta Neres, Michele M. C. Carafa, Alexandra Carvalho, and Paula Teves-Costa
Nat. Hazards Earth Syst. Sci., 22, 117–138, https://doi.org/10.5194/nhess-22-117-2022, https://doi.org/10.5194/nhess-22-117-2022, 2022
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Probabilistic seismic hazard assessment (PSHA) is the most common tool used to decide on the acceptable seismic risk by society and mitigation measures. In slowly deforming regions, such Iberia, the earthquake generation models (EGMs) for PSHA suffer from great uncertainty. In this work we propose two sanity tests to be applied to EGMs, comparing the EGM moment release with constrains derived from GNSS observations or neotectonic modelling. Similar tests should be part of other region studies.
Haekal Azief Haridhi, Bor-Shouh Huang, Kuo-Liang Wen, Arif Mirza, Syamsul Rizal, Syahrul Purnawan, Ilham Fajri, Frauke Klingelhoefer, Char Shine Liu, Chao Shing Lee, Crispen R. Wilson, Tso-Ren Wu, Ichsan Setiawan, and Van Bang Phung
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2021-375, https://doi.org/10.5194/nhess-2021-375, 2022
Revised manuscript accepted for NHESS
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Near the northern end of Sumatra, the horizontal movement Sumatran Fault Zone extended to its northern offshore. The movement of offshore fault segments trigger the submarine landslides and induce tsunami. Scenarios of a significant tsunami caused by the combined effect of an earthquake and its triggered submarine landslide at coast was proposed in this study. Based on our finding, the landslide tsunami hazard assessment and early warning systems in this region should be urgently considered.
Janneke van Ginkel, Elmer Ruigrok, Jan Stafleu, and Rien Herber
Nat. Hazards Earth Syst. Sci., 22, 41–63, https://doi.org/10.5194/nhess-22-41-2022, https://doi.org/10.5194/nhess-22-41-2022, 2022
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A soft, shallow subsurface composition has the tendency to amplify earthquake waves, resulting in increased ground shaking. Therefore, this paper presents a workflow in order to obtain a map classifying the response of the subsurface based on local geology, earthquake signals, and background noise recordings for the Netherlands. The resulting map can be used as a first assessment in regions with earthquake hazard potential by mining or geothermal energy activities, for example.
Enrico Baglione, Stefano Lorito, Alessio Piatanesi, Fabrizio Romano, Roberto Basili, Beatriz Brizuela, Roberto Tonini, Manuela Volpe, Hafize Basak Bayraktar, and Alessandro Amato
Nat. Hazards Earth Syst. Sci., 21, 3713–3730, https://doi.org/10.5194/nhess-21-3713-2021, https://doi.org/10.5194/nhess-21-3713-2021, 2021
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We investigated the seismic fault structure and the rupture characteristics of the MW 6.6, 2 May 2020, Cretan Passage earthquake through tsunami data inverse modelling. Our results suggest a shallow crustal event with a reverse mechanism within the accretionary wedge rather than on the Hellenic Arc subduction interface. The study identifies two possible ruptures: a steeply sloping reverse splay fault and a back-thrust rupture dipping south, with a more prominent dip angle.
Navid Hooshangi, Ali Asghar Alesheikh, Mahdi Panahi, and Saro Lee
Nat. Hazards Earth Syst. Sci., 21, 3449–3463, https://doi.org/10.5194/nhess-21-3449-2021, https://doi.org/10.5194/nhess-21-3449-2021, 2021
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Task allocation under uncertain conditions is a key problem for agents attempting to achieve harmony in disaster environments. This paper presents an agent-based simulation to investigate task allocation considering appropriate spatial strategies to manage uncertainty in urban search and rescue (USAR) operations.
Thomas Chartier, Oona Scotti, Hélène Lyon-Caen, Keith Richard-Dinger, James H. Dieterich, and Bruce E. Shaw
Nat. Hazards Earth Syst. Sci., 21, 2733–2751, https://doi.org/10.5194/nhess-21-2733-2021, https://doi.org/10.5194/nhess-21-2733-2021, 2021
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In order to evaluate the seismic risk, we first model the annual rate of occurrence of earthquakes on the faults near Istanbul. By using a novel modelling approach, we consider the fault system as a whole rather than each fault individually. We explore the hypotheses that are discussed in the scientific community concerning this fault system and compare the modelled results with local recorded data and a physics-based model, gaining new insights in particular on the largest possible earthquake.
Francisco J. Chávez-García, Hugo Monsalve-Jaramillo, and Joaquín Vila-Ortega
Nat. Hazards Earth Syst. Sci., 21, 2345–2354, https://doi.org/10.5194/nhess-21-2345-2021, https://doi.org/10.5194/nhess-21-2345-2021, 2021
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We analyze earthquake damage observed in Armenia, Colombia, during the 1999 event. We investigate the reasons behind the damage and the possibility of predicting it using vulnerability studies. We show that vulnerability was a major factor and that observed damage was predicted by a vulnerability study made in 1993, which sadly had no societal impact. The comparison between two vulnerability studies, in 1993 and 2004, suggests that Armenia may still be highly vulnerable to future earthquakes.
Andrea Antonucci, Andrea Rovida, Vera D'Amico, and Dario Albarello
Nat. Hazards Earth Syst. Sci., 21, 2299–2311, https://doi.org/10.5194/nhess-21-2299-2021, https://doi.org/10.5194/nhess-21-2299-2021, 2021
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We present a probabilistic approach for integrating incomplete intensity distributions by means of the Bayesian combination of estimates provided by intensity prediction equations (IPEs) and data documented at nearby localities, accounting for the relevant uncertainties. The performance of the proposed methodology is tested at 28 Italian localities with long and rich seismic histories and for the strong 1980 and 2009 earthquakes in Italy. An application of this approach is also illustrated.
Changsheng Jiang, Libo Han, Feng Long, Guijuan Lai, Fengling Yin, Jinmeng Bi, and Zhengya Si
Nat. Hazards Earth Syst. Sci., 21, 2233–2244, https://doi.org/10.5194/nhess-21-2233-2021, https://doi.org/10.5194/nhess-21-2233-2021, 2021
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The b value is a controversial parameter that has the potential to identify the location of an upcoming strong earthquake. We conducted a case study using a newly developed algorithm that can overcome the subjectivity of calculation. The results confirmed the scientific significance of the b value for seismic hazard analysis and revealed that fluid intrusion may have been the cause of the overactive aftershocks of the studied earthquake.
Kristján Jónasson, Bjarni Bessason, Ásdís Helgadóttir, Páll Einarsson, Gunnar B. Guðmundsson, Bryndís Brandsdóttir, Kristín S. Vogfjörd, and Kristín Jónsdóttir
Nat. Hazards Earth Syst. Sci., 21, 2197–2214, https://doi.org/10.5194/nhess-21-2197-2021, https://doi.org/10.5194/nhess-21-2197-2021, 2021
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Local information on epicentres and Mw magnitudes from international catalogues have been combined to compile a catalogue of earthquakes in and near Iceland in the years 1900–2019. The magnitudes are either moment-tensor modelled or proxy values obtained with regression on Ms or exceptionally on mb. The catalogue also covers the northern Mid-Atlantic Ridge with less accurate locations but similarly harmonised magnitudes.
Onur Tan
Nat. Hazards Earth Syst. Sci., 21, 2059–2073, https://doi.org/10.5194/nhess-21-2059-2021, https://doi.org/10.5194/nhess-21-2059-2021, 2021
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Turkey is one of the most seismically active regions. In this study, an extended and homogenized earthquake catalogue, which is essential for seismic hazard studies, is presented in an easily manageable format for a wide range of researchers in earth sciences. It is the most comprehensive catalogue for Turkey and contains approximately ~ 378 000 events between 1900 and 2018.
Enrique Guillermo Cordaro, Patricio Venegas-Aravena, and David Laroze
Nat. Hazards Earth Syst. Sci., 21, 1785–1806, https://doi.org/10.5194/nhess-21-1785-2021, https://doi.org/10.5194/nhess-21-1785-2021, 2021
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We developed a methodology that generates free externally disturbed magnetic variations in ground magnetometers close to the Chilean convergent margin. Spectral analysis (~ mHz) and magnetic anomalies increased prior to large Chilean earthquakes (Maule 2010, Mw 8.8; Iquique 2014, Mw 8.2; Illapel 2015, Mw 8.3). These findings relate to microcracks within the lithosphere due to stress state changes. This physical evidence should be thought of as a last stage of the earthquake preparation process.
Ali Rodríguez-Castellanos, Sonia E. Ruiz, Edén Bojórquez, Miguel A. Orellana, and Alfredo Reyes-Salazar
Nat. Hazards Earth Syst. Sci., 21, 1445–1460, https://doi.org/10.5194/nhess-21-1445-2021, https://doi.org/10.5194/nhess-21-1445-2021, 2021
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Seismic design guidelines for building structures present simplified approaches to include relevant structural behavior that affects the structural response through design spectra modification factors. The objective of this study is to propose simplified mathematical expressions to modify the design spectra to consider the stiffness and strength-degrading behavior of structures. Additionally, these expressions are proposed to be included in the next version of the Mexico City Building Code.
Yavor Kamer, Guy Ouillon, and Didier Sornette
Nat. Hazards Earth Syst. Sci., 20, 3611–3625, https://doi.org/10.5194/nhess-20-3611-2020, https://doi.org/10.5194/nhess-20-3611-2020, 2020
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Earthquakes cluster in space highlighting fault structures in the crust. We introduce a method to identify such patterns. The method follows a bottom-up approach that starts from many small clusters and, by repeated mergings, produces a larger, less complex structure. We test the resulting fault network model by investigating its ability to forecast the location of earthquakes that were not used in the study. We envision that our method can contribute to future studies relying on fault patterns.
Silvia Pondrelli, Francesco Visini, Andrea Rovida, Vera D'Amico, Bruno Pace, and Carlo Meletti
Nat. Hazards Earth Syst. Sci., 20, 3577–3592, https://doi.org/10.5194/nhess-20-3577-2020, https://doi.org/10.5194/nhess-20-3577-2020, 2020
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We used 100 years of seismicity in Italy to predict the hypothetical tectonic style of future earthquakes, with the purpose of using this information in a new seismic hazard model. To squeeze all possible information out of the available data, we created a chain of criteria to be applied in the input and output selection processes. The result is a list of cases from very clear ones, e.g., extensional tectonics in the central Apennines, to completely random tectonics for future seismic events.
Mark C. Quigley, Wendy Saunders, Chris Massey, Russ Van Dissen, Pilar Villamor, Helen Jack, and Nicola Litchfield
Nat. Hazards Earth Syst. Sci., 20, 3361–3385, https://doi.org/10.5194/nhess-20-3361-2020, https://doi.org/10.5194/nhess-20-3361-2020, 2020
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This paper examines the roles of earth science information (data, knowledge, advice) in land-use decision-making in Christchurch, New Zealand, in response to the 2010–2011 Canterbury earthquake sequence. A detailed timeline of scientific activities and information provisions relative to key decision-making events is provided. We highlight the importance and challenges of the effective provision of science to decision makers in times of crisis.
Chieh-Hung Chen, Yang-Yi Sun, Strong Wen, Peng Han, Li-Ching Lin, Huaizhong Yu, Xuemin Zhang, Yongxin Gao, Chi-Chia Tang, Cheng-Horng Lin, and Jann-Yenq Liu
Nat. Hazards Earth Syst. Sci., 20, 3333–3341, https://doi.org/10.5194/nhess-20-3333-2020, https://doi.org/10.5194/nhess-20-3333-2020, 2020
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Scientists demystify stress changes before mainshocks and utilize the foreshocks as an indicator. We investigate changes in seismicity far from mainshocks by using tens of thousands of M ≥ 2 quakes for 10 years in Taiwan and Japan. The results show that wide areas exhibit increased seismicity occurring more than several times in areas of the fault rupture. The stressed crust triggers resonance at frequencies varying from ~ 5 × 10–4 to ~ 10–3 Hz that is supported by the resonant frequency model.
Jin Chen, Hong Tang, and Wenkai Chen
Nat. Hazards Earth Syst. Sci., 20, 3117–3134, https://doi.org/10.5194/nhess-20-3117-2020, https://doi.org/10.5194/nhess-20-3117-2020, 2020
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The spatial and temporal distribution characteristics of aftershocks around the fault are analyzed according to the stress changes after the main earthquake. The model can be used to predict the multi-timescale anisotropy distribution of aftershocks fairly. The finite fault model of the main earthquake is used in the construction of the prediction model. The model is a deep neural network; the inputs are the stress components of each point; and the output is the probability of an aftershock.
Eugenio E. Vogel, Felipe G. Brevis, Denisse Pastén, Víctor Muñoz, Rodrigo A. Miranda, and Abraham C.-L. Chian
Nat. Hazards Earth Syst. Sci., 20, 2943–2960, https://doi.org/10.5194/nhess-20-2943-2020, https://doi.org/10.5194/nhess-20-2943-2020, 2020
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The Nazca–South American subduction front is one of the most active in the world. We have chosen four zones along this front to do a comparative study on possible different dynamics. Data are public and well tested in the last decades. The methods are original since mutability and Shannon entropy are not always used in this kind of problem, and, to our knowledge, this is the first time they are combined. The north of Chile could be a zone with greater chances of a large earthquake.
Saeideh Farahani, Behrouz Behnam, and Ahmad Tahershamsi
Nat. Hazards Earth Syst. Sci., 20, 2889–2903, https://doi.org/10.5194/nhess-20-2889-2020, https://doi.org/10.5194/nhess-20-2889-2020, 2020
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Iran is located on the Alpide earthquake belt, in the active collision zone between the Eurasian and Arabian plates. Due to the rapid demands for new lifelines, a risk assessment should be performed to reduce the probable damage in advance. In this study, a precise GIS-based map is proposed by employing the HAZUS methodology.
Eveline Sayão, George Sand França, Maristela Holanda, and Alexandro Gonçalves
Nat. Hazards Earth Syst. Sci., 20, 2001–2019, https://doi.org/10.5194/nhess-20-2001-2020, https://doi.org/10.5194/nhess-20-2001-2020, 2020
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One of the biggest challenges in studying reservoir-triggered seismicity (RTS) is to identify factors that can trigger seismicity. A spatial database and a web viewer were created, gathering the data pertinent to the RTS study. Results were obtained in processing these data; for example, the occurrence of RTS increases with the height of the dam, the minimum limiting volume value is 1 × 10−4 km3 for occurrence of RTS, and for geology no correlations were found, among other results.
Hafize Basak Bayraktar and Ceren Ozer Sozdinler
Nat. Hazards Earth Syst. Sci., 20, 1741–1764, https://doi.org/10.5194/nhess-20-1741-2020, https://doi.org/10.5194/nhess-20-1741-2020, 2020
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In this study, probabilistic tsunami hazard analysis was performed for the Tuzla region in case of a Prince Island fault rupture, which is the closest fault zone to the megacity Istanbul, and it has been silent for centuries. A synthetic earthquake catalog is generated using Monte Carlo simulations, and these events are used for tsunami analysis. The results of the study show that the probability of exceedance of 0.3 m tsunami wave height is bigger than 90 % for the next 50 and 100 years.
Khalid Mahmood, Naveed Ahmad, Usman Khan, and Qaiser Iqbal
Nat. Hazards Earth Syst. Sci., 20, 1639–1661, https://doi.org/10.5194/nhess-20-1639-2020, https://doi.org/10.5194/nhess-20-1639-2020, 2020
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The paper presents probabilistic-based seismic hazard maps prepared for Peshawar for various return periods using classical PSHA. The study considered both shallow and deep earthquakes, represented by area sources, while using recent ground motion prediction equations. The hazard map for a 475-year return period was compared with the hazard map given in the Building Code of Pakistan; they were found to be in close agreement. The obtained maps may be used for infrastructure risk assessment.
Ekbal Hussain, John R. Elliott, Vitor Silva, Mabé Vilar-Vega, and Deborah Kane
Nat. Hazards Earth Syst. Sci., 20, 1533–1555, https://doi.org/10.5194/nhess-20-1533-2020, https://doi.org/10.5194/nhess-20-1533-2020, 2020
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Many of the rapidly expanding cities around the world are located near active tectonic faults that have not produced an earthquake in recent memory. But these faults are generally small, and so most previous seismic-hazard analysis has focussed on large, more distant faults. In this paper we show that a moderate-size earthquake on a fault close to the city of Santiago in Chile has a greater impact on the city than a great earthquake on the tectonic boundary in the ocean, about a 100 km away.
Patricio Venegas-Aravena, Enrique G. Cordaro, and David Laroze
Nat. Hazards Earth Syst. Sci., 20, 1485–1496, https://doi.org/10.5194/nhess-20-1485-2020, https://doi.org/10.5194/nhess-20-1485-2020, 2020
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Over the past few years, a number of data have emerged on predicting large earthquakes using the magnetic field. These measurements are becoming strongly supported by rock electrification mechanisms experimentally and theoretically in seismo-electromagnetic theory. However, the processes that occur within the faults have yet to be elucidated. That is why this work theoretically links the friction changes of the faults with the lithospheric magnetic anomalies that surround the faults.
Jeremy Rohmer, Pierre Gehl, Marine Marcilhac-Fradin, Yves Guigueno, Nadia Rahni, and Julien Clément
Nat. Hazards Earth Syst. Sci., 20, 1267–1285, https://doi.org/10.5194/nhess-20-1267-2020, https://doi.org/10.5194/nhess-20-1267-2020, 2020
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Fragility curves (FCs) are key tools for seismic probabilistic safety assessments that are performed at the level of the nuclear power plant (NPP). These statistical methods relate the probabilistic seismic hazard loading at the given site to the required performance of the NPP safety functions. In the present study, we investigate how the tools of
non-stationary extreme value analysis can be used to model in a flexible manner the FCs for NPP.
Yu-Sheng Sun, Hsien-Chi Li, Ling-Yun Chang, Zheng-Kai Ye, and Chien-Chih Chen
Nat. Hazards Earth Syst. Sci., 20, 743–753, https://doi.org/10.5194/nhess-20-743-2020, https://doi.org/10.5194/nhess-20-743-2020, 2020
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Real-time probabilistic seismic hazard assessment (PSHA) was developed in consideration of its practicability for daily life and the rate of seismic activity with time. We selected the 2016 Meinong (ML 6.6) and the 2018 Hualien (ML 6.2) earthquakes in Taiwan as examples. The seismic intensity forecasting maps produced by the real-time PSHA facilitated the forecast of the maximum expected seismic intensity for the following 90 d. Compared with real data the maps showed considerable effectiveness.
Saad Khan, Mark van der Meijde, Harald van der Werff, and Muhammad Shafique
Nat. Hazards Earth Syst. Sci., 20, 399–411, https://doi.org/10.5194/nhess-20-399-2020, https://doi.org/10.5194/nhess-20-399-2020, 2020
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On 8 October 2005 the region of Kashmir was struck by a devastating earthquake of magnitude 7.6. Northern Pakistan and the region of Kashmir were severely damaged. The official death toll according to the Pakistani government was 87 350. It was thought that the terrain could have played a crucial role in the damage caused by the earthquake directly or indirectly. In this article we found that the terrain played a crucial role in intensifying the devastation of the earthquake.
Matty Sharon, Amir Sagy, Ittai Kurzon, Shmuel Marco, and Marcelo Rosensaft
Nat. Hazards Earth Syst. Sci., 20, 125–148, https://doi.org/10.5194/nhess-20-125-2020, https://doi.org/10.5194/nhess-20-125-2020, 2020
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We present a methodology for mapping faults that constitute far-field (ground motion) and near-field (surface rupture) hazards to structures, particularly for critical facilities. For categorising faults, the criteria are adjusted to local tectonic characteristics, combining data of geological maps, instrumental seismicity, geodesy and past earthquakes. Our results adhere to international standards of hazard assessment for nuclear power plants and improve the regional tectonic understanding.
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Short summary
As new data are collected, seismic hazard models can be updated and improved. In the framework of a project aimed to update the Italian seismic hazard model, we proposed a model based on the definition and parametrization of area sources. Using geological data, seismicity and other geophysical constraints, we delineated three-dimensional boundaries and activity rates of a seismotectonic zoning and explored the epistemic uncertainty by means of a logic-tree approach.
As new data are collected, seismic hazard models can be updated and improved. In the framework...
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