Article
Geochemistry & Geophysics
Yusuke Yamanaka, Yuichiro Tanioka
Summary: The study digitized tide gauge records, developed a slip distribution model, and successfully improved tsunami waveforms compared to previous studies for the 1906 Colombia-Ecuador earthquake. The results show variations in the release of accumulated slip deficits in different areas affected by the earthquake.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Engineering, Marine
Jessica Rodwell, James H. Williams, Ryan Paulik
Summary: This study investigates the vulnerability of critical infrastructure to tsunamis by developing empirical fragility curves. The research reveals that culverts are the most vulnerable infrastructure component to tsunami damage. Compared to roads or utility poles, culverts, drain inlets, and railways are found to be more susceptible to destruction.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Geography, Physical
Pedro Matos-Llavona, Lisa L. Ely, Breanyn MacInnes, Tina Dura, Marco A. Cisternas, Joanne Bourgeois, David Bruce, Jessica DePaolis, Alexander Dolcimascolo, Benjamin P. Horton, Daniel Melnick, Alan R. Nelson, Walter Szeliga, Robert L. Wesson
Summary: This study examines the inconsistency between the tsunami deposits at a location in south-central Chile and the historical and geological records of tsunamis. The research suggests that the discrepancy may be attributed to factors such as falling sea levels, coastal geomorphological changes, and a potentially larger tsunami in 1960.
EARTH SURFACE PROCESSES AND LANDFORMS
(2022)
Article
Geochemistry & Geophysics
Ryan Paulik, James H. Williams, Nick Horspool, Patricio A. Catalan, Richard Mowll, Pablo Cortes, Richard Woods
Summary: The 2015 M(W)8.3 Illapel Earthquake in Coquimbo, Chile, resulted in a tsunami that caused significant damage to buildings and infrastructure. A survey was conducted to measure tsunami hazard characteristics and record damage to buildings and infrastructure components, with findings showing a wide range of tsunami flow depths and varying levels of damage.
PURE AND APPLIED GEOPHYSICS
(2021)
Article
Multidisciplinary Sciences
Joaquin Hormazabal, Marcos Moreno, Francisco Ortega-Culaciati, Juan Carlos Baez, Carlos Pena, Christian Sippl, Diego Gonzalez-Vidal, Javier Ruiz, Sabrina Metzger, Shoichi Yoshioka
Summary: This study investigates the spatiotemporal evolution of afterslip, seismicity, and locking following the 2015 Illapel earthquake using six years of continuous GNSS measurements. The results reveal that afterslip is concentrated in two zones surrounding the region of largest coseismic slip. The rapid relocking of the asperity experiencing the largest coseismic slip may explain the regular recurrence time of earthquakes in this region.
SCIENTIFIC REPORTS
(2023)
Article
Geochemistry & Geophysics
Haozhe Yang, Rumeng Guo, Jiangcun Zhou, Hongfeng Yang, Heping Sun
Summary: Large earthquakes can cause changes in regional groundwater pressure, resulting in poroelastic rebound and observable surface deformation. By modeling the hydrologic response following the 2015 Illapel earthquake, it was found that fluid flows from the co-seismic high-slip region to the north and south sides, with stronger poroelastic effects in the north. Previous models overestimated the topography on both sides of the rupture zone and underestimated the middle region.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Environmental Studies
Ana Gabriela Fernandez Saavedra, Rosario Gonzalez Arias, Sandra Dema Moreno, Virginia Cocina Diaz
Summary: The aim of this article is to examine the impact of a disaster on leadership development, specifically in terms of gender. The research reveals that male leadership is linked to traditional gender roles during the response and recovery phases, while women are actively involved in managing emergency aid during the response phase due to their reproductive and care roles. Women also exhibit leadership in the recovery phase, defying traditional roles and demonstrating their ability to adapt to the challenges of the disaster.
DISASTER PREVENTION AND MANAGEMENT
(2023)
Article
Geochemistry & Geophysics
Gabriel Easton, Jose Gonzalez-Alfaro, Angelo Villalobos, Gabriel Alvarez, Diego Melgar, Sergio Ruiz, Bernardo Sepulveda, Manuel Escobar, Tomas Leon, Juan Carlos Baez, Tatiana Izquierdo, Maximiliano Forch, Manuel Abad
Summary: On September 16, 2015, the M-w 8.3 Illapel megathrust earthquake caused unexpectedly high tsunami waves in the Coquimbo region, central-northern Chile. The geological response of the coast was complex and varied, influenced by nearby seismic patches. Additionally, evidence of prehistoric tsunamis suggests that these coasts have been exposed to both near and distant tsunamis.
SEISMOLOGICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Joan L. Latchman, Frederic J. -Y. Dondin, Richard E. A. Robertson, Roderick Stewart, Paddy Smith, Lloyd L. Lynch, Chandradath Ramsingh, Nisha Nath, Hannah Ramsingh, Ian Juman, Stacey Edwards, Clevon Ash
Summary: Kick-'em-Jenny (KeJ), located in the Lesser Antilles, is the only known active submarine volcano in the region. It has eruption episodes approximately once every ten years. Previous eruptions have had surface evidence and seismic effects, but T-phase recordings are now considered to provide firm evidence of eruptions. Recent episodes have lacked surface evidence, but differences in T-phase wave trains suggest variations in eruption behavior. Real-time monitoring and analysis will enhance activity assessments and risk communication for future KeJ episodes.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2023)
Article
Astronomy & Astrophysics
Wojciech Jarmolowski, Anna Belehaki, Manuel Hernandez Pajares, Michael Schmidt, Andreas Goss, Pawel Wielgosz, Heng Yang, Anna Krypiak-Gregorczyk, Ioanna Tsagouri, Evangelos Paouris, Enric Monte-Moreno, Alberto Garcia-Rigo, Beata Milanowska, Eren Erdogan, Victoria Graffigna, Roger Haagmans
Summary: The study examined the ionospheric electric field responses to the earthquake in Chile-Illapel in 2015, revealing that seismic activity can trigger ionospheric disturbances with the combination of techniques showing analytical advantages.
JOURNAL OF SPACE WEATHER AND SPACE CLIMATE
(2021)
Article
Oceanography
Peitao Wang, Zhiyuan Ren, Lining Sun, Jingming Hou, Zongchen Wang, Ye Yuan, Fujiang Yu
Summary: The study identified systematic discrepancies in both tsunami arrival time and leading negative phase for the transoceanic tsunami in Illapel, Chile on September 16, 2015. By applying a corrected long wave model, which accounted for various physical effects, the study found good agreement between observed and simulated waveforms, with the effects contributing to the travel time delay correction. The traditional shallow water model was found to have inherent defects in estimating tsunami arrival and the leading negative phase, indicating the importance of accounting for secondary physical effects in tsunami modeling.
ACTA OCEANOLOGICA SINICA
(2021)
Article
Geology
Diego Aedo, Daniel Melnick, Ed Garrett, Mario Pino
Summary: This study mapped three sand layers in the Chaihuin marsh deposited during the 1960 tsunami, and associated them with past tsunamis. The results suggest that the sand layers were likely transported to the marsh by tsunami waves. Variability in lateral distribution and source of the sand layers may be attributed to changes in sand bar due to human occupation.
Article
Geochemistry & Geophysics
Arthur Frankel
Summary: This study analyzed strong-motion recordings of two large earthquakes in Chile to determine the rupture propagation and characteristics of high-frequency ground motions. The analysis revealed the distance and direction of the earthquake rupture, as well as the location and depth of the high-frequency subevents. It also developed a methodology to map the high-frequency source factors on the rupture zone. The results showed that the high-frequency subevents mainly occurred downdip of the peak slip of the earthquakes.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2022)
Article
Geochemistry & Geophysics
Yuji Itoh, Takuya Nishimura, Keisuke Ariyoshi, Hiroyuki Matsumoto
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2019)
Article
Oceanography
K. A. Sementsov, M. A. Nosov, S. V. Kolesov, V. A. Karpov, H. Matsumoto, Y. Kaneda
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2019)
Article
Multidisciplinary Sciences
Hiroyuki Matsumoto, Mario Zampolli, Georgios Haralabus, Jerry Stanley, James Mattila, Nurcan Meral Ozel
SCIENTIFIC REPORTS
(2019)
Article
Geosciences, Multidisciplinary
T. Tonegawa, E. Araki, H. Matsumoto, T. Kimura, K. Obana, G. Fujie, R. Arai, K. Shiraishi, M. Nakano, Y. Nakamura, T. Yokobiki, S. Kodaira
Summary: Seismic wave extractions were performed using ambient noise records observed by distributed acoustic sensing (DAS) technology. It was shown that microseisms can be investigated at a local scale using DAS records observed in the ocean. P and Scholte wave extractions were successfully performed from ambient seafloor noise observed by DAS, indicating that the waves are originated from the pressure field at the sea surface.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Ronan J. Le Bras, Mario Zampolli, Dirk Metz, Georgios Haralabus, Paulina Bittner, Marcela Villarroel, Hiroyuki Matsumoto, Gerhard Graham, Nurcan Meral Ozel
Summary: Examination of IMS hydroacoustic data reveals a long-duration activity before and after the HTHH volcano eruption on 15 January 2022. The eruption generated low-frequency seismic waves, infrasound waves, and a tsunami. The peak-to-peak pressure observed at IS22 station was 340 Pa, surpassing previous records. The Lamb wave and tsunami were well recorded, but a precursor tsunami was not observed on the hydroacoustic IMS network. The dispersive tail of the main tsunami was observed on multiple hydroacoustic hydrophone stations, including one in the Atlantic Ocean.
SEISMOLOGICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Satoru Baba, Eiichiro Araki, Yojiro Yamamoto, Takane Hori, Gou Fujie, Yasuyuki Nakamura, Takashi Yokobiki, Hiroyuki Matsumoto
Summary: Off Cape Muroto area in southwest Japan, which is located along the Nankai Trough, is a typical area with both slow and megathrust earthquakes. To better understand the tectonic conditions, high-resolution monitoring of slow earthquakes is necessary. In this study, distributed acoustic sensing (DAS) measurement was conducted using offshore fiber-optic cable to observe shallow tremors, a type of slow earthquakes, for the first time. The tremor signals recorded by DAS had longer durations and consisted of several phases with apparent velocities coherent only in tens of meters, providing information about the spatial relationship between slow earthquakes and structural characteristics.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Hiroyuki Matsumoto, Mario Zampolli, Georgios Haralabus, Jerry Stanley, James Robertson, Nurcan Meral Oezel
Summary: This study examined hydroacoustic signals from marine volcanic activity at Kadovar Island in Papua New Guinea. The signals were recorded by the Comprehensive Nuclear-Test-Ban Treaty International Monitoring System hydroacoustic station HA11 Wake Island. The study identified two episodes of high volcanic activity and assessed the value of hydroacoustic data for remote surveillance of geohazards in sparsely monitored areas.
PURE AND APPLIED GEOPHYSICS
(2023)
Article
Geochemistry & Geophysics
Jeffry L. Stevens, Jeffrey Hanson, Peter Nielsen, Mario Zampolli, Ronan Le Bras, Georgios Haralabus, Steven M. Day
Summary: The IMS hydroacoustic network includes six hydrophone stations and 5 T-stations, with the latter primarily intended to capture impulsive signals from in-water explosions. However, recordings of this type of signal at the T-stations are rare due to inefficient signal conversion from ocean to land. Numerical calculations and environmental information gathering were conducted to improve understanding of this signal conversion at T-stations.
PURE AND APPLIED GEOPHYSICS
(2021)
Article
Geochemistry & Geophysics
Peter L. Nielsen, Mario Zampolli, Ronan Le Bras, Pierrick Mialle, Paulina Bittner, Alexander Poplavskiy, Mikhail Rozhkov, Georgios Haralabus, Elena Tomuta, Randy Bell, Patrick Grenard, Tammy Taylor, Nurcan Meral Oezel
Summary: This paper presents the methodologies applied by CTBTO within months after the loss of the submarine, aimed at detecting, locating and characterizing the November 15th signal of unknown origin and the December 1st calibration explosion.
PURE AND APPLIED GEOPHYSICS
(2021)
Review
Environmental Sciences
Bruce M. Howe, Jennifer Miksis-Olds, Eric Rehm, Hanne Sagen, Peter F. Worcester, Georgios Haralabus
FRONTIERS IN MARINE SCIENCE
(2019)
