Article
Geochemistry & Geophysics
Xiaodong Yang, Qiang Qiu, Wanpeng Feng, Jian Lin, Jinchang Zhang, Zhiyuan Zhou, Fan Zhang
Summary: The Makran subduction zone is an active area with uncertain earthquake and tsunami characteristics. By studying the characteristics of a recent earthquake in 2017, we have identified some key features and suggested the possibility of future earthquakes.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Toshiko Terakawa, Mitsuhiro Matsu'ura
Summary: We developed an inversion method to estimate 3-D tectonic stress fields using centroid moment tensor (CMT) data from seismic events. The analysis of 24 years of data in northeast Japan revealed that the tectonic stress orientation was stable for 14 years before the 2011 megathrust event. However, there is a possibility of significant changes in tectonic stress orientation in the post-seismic period. The evaluation results indicate that the stress orientation change in the region off Fukushima and Ibaraki is real.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Kodai Sagae, Hisashi Nakahara, Takeshi Nishimura, Kazutoshi Imanishi
Summary: This study detected and located deep low-frequency tremors beneath the Kii Peninsula, Nankai subduction zone, Japan, using data from a dense seismic array. The high-resolution tremor catalogue revealed various characteristics of tremor activity, including continuous updip migration and different migration speeds depending on along-strike migration. The results also suggest a depth dependence of frictional strength on the plate interface and a positive correlation between accumulated radiated energies and updip migration speed, implying a potential role of fluid migration in the updip migration process.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
I van Zelst, L. Rannabauer, A. -A Gabriel, Y. van Dinther
Summary: Detailed imaging of accretionary wedges reveals the potential tsunami hazard posed by splay fault networks. This study investigates the dynamics of splay fault activation during megathrust earthquakes and their effects on tsunami generation using a 2-D dynamic rupture model. The results highlight the importance of considering both tectonic and earthquake processes in understanding tsunamigenesis.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Review
Geosciences, Multidisciplinary
Chao An
Summary: Tsunamis, mainly triggered by earthquakes, are highly destructive disasters in the ocean, with large waves propagating across the ocean before dramatically increasing in amplitude during the shoaling process in coastal areas, causing severe casualties and property damage. In recent years, the frequent occurrence of tsunamis has drawn increasing attention to the study of tsunami mechanisms and warnings by many countries.
SCIENCE CHINA-EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
Yicun Guo, Jiancang Zhuang, Huai Zhang
Summary: This study uses a statistical model to detect earthquake swarm sequences that may be related to slow slip events (SSEs) in the Nankai subduction zone. The detected swarms are mostly located in the western part, complementing the distribution of SSEs in the region.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Tomoaki Nishikawa, Takuya Nishimura
Summary: Research has found that slow slip events (SSEs) at subduction zone plate boundaries can trigger earthquake swarms and megathrust earthquakes. The current statistical models do not explicitly consider the seismicity-triggering effect of SSEs, resulting in failed earthquake predictions. In this study, a new statistical model named the SSE-modulated ETAS model was constructed by incorporating SSE moment rates into the original ETAS model. Application of this new model to SSEs and M 2.5 or greater earthquakes in the Hikurangi Trench, New Zealand showed significant improvement compared to the original model.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
D. Legrand, A. Iglesias, S. K. Singh, V Cruz-Atienza, C. Yoon, L. A. Dominguez, R. W. Valenzuela, G. Suarez, O. Castro-Artola
Summary: The rate of aftershocks is high in the Ometepec segment of the Mexican subduction zone, likely due to the presence of overpressured fluids and a rough plate interface. This is characterized by a high b-value and slow decaying aftershock sequence.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
S. X. Chu, G. C. Beroza
Summary: The study finds that productive aftershock sequences of intermediate-depth earthquakes behave similarly to those of crustal earthquakes and tend to appear mainly in the Pacific Plate, where they are significantly correlated with along-strike variations in V-P-V-S ratio, suggesting a role for fluids in enabling intermediate-depth aftershock activity.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
Caroline Mouchon, William B. B. Frank, Mathilde Radiguet, Piero Poli, Nathalie Cotte
Summary: Geodetic positioning is the reference for slow slip events, but daily solutions limit studies. Low-frequency earthquakes can provide a high-resolution time history of slow slip dynamics. The ratio of geodetic to seismic fault slip varies with time, suggesting the saturation of the earthquake source region as slow slip grows.
Article
Geochemistry & Geophysics
Luca Dal Zilio, Nadia Lapusta, Jean-Philippe Avouac, Taras Gerya
Summary: We present a 2-D thermomechanical computational framework for simulating earthquake sequences in a non-linear visco-elasto-plastic compressible medium. The method incorporates an adaptive time-stepping and an invariant formulation of the classical friction law, allowing for the analysis of earthquake sequences and the exploration of their physical connections.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Osamu Sandanbata, Shingo Watada, Kenji Satake, Hiroo Kanamori, Luis Rivera, Zhongwen Zhan
Summary: The main cause of tsunamis is large subduction zone earthquakes, but submarine volcanic processes can also generate tsunamis. This study used tsunami and seismic data from the 2015 event to show that the uplift of a submarine caldera due to overpressure in its magma reservoir caused an earthquake and tsunami. The mechanism of tsunami generation by submarine trapdoor faulting highlights the importance of monitoring submarine calderas for accurate assessment of tsunami hazards.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Kevin F. Lally, Jacqueline Caplan-Auerbach, John A. Power
Summary: Tanaga Island has four stratovolcanoes, with only Tanaga having a confirmed record of historical eruptive activity. The study uses seismic relocations to gain insight into volcanic and tectonic activity in the region. The results show that volcanic activity is relatively rare compared to tectonic activity.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Geosciences, Multidisciplinary
Jaishri Sanwal, C. P. Rajendran, Mohammad Heidarzadeh, Swapnil Mache, K. Anandasabari, Kusala Rajendran
Summary: The analysis of cores from three sites near Port Blair identified previous episodes of tsunamis based on their sediment characteristics and microfossil content. These deposits at various depths have ages that correlate with those from far-field locations in the Indian Ocean region and are likely caused by events similar to the 2004 tsunami. The study also reveals a nonlinear pattern for the causative earthquakes with a quasiperiodic recurrence regime transitioning into temporally clustered events.
Article
Green & Sustainable Science & Technology
Zhuojuan Xie, Enhui Wang, Yuejun Lyu
Summary: This research provides a deeper understanding of the seismicity characteristics and shape of the Ryukyu Islands subduction zone. Supplementary research has been conducted on the focal mechanism solution and stress field of the subduction zone.
Article
Geosciences, Multidisciplinary
Jun-Whan Lee, Jennifer L. Irish, Robert Weiss
Article
Geosciences, Multidisciplinary
Vasily Titov, Christopher Moore
Summary: A modeling study successfully simulated the 2013 U.S. East Coast meteotsunami event using numerical simulation and weather radar reflection imagery, showing promise for accurately predicting coastal tsunami impacts based on measurements and real-time data assimilation.
Article
Geosciences, Multidisciplinary
Benjamin Popovich, Liam Wotherspoon, Jose Borrero
Summary: Ports in New Zealand play a critical role in domestic and international shipping, but are at risk of structural damage and operational disruption due to tsunami hazards. While the impact of tsunamis varies between ports, the eastern coastline faces the highest risk, particularly from earthquakes along the Southern Kermadec, Hikurangi and South American Subduction Zones. An earthquake off the Peruvian coastline has the potential to impact a larger number of ports, affecting international trade capacity, regional recovery, and domestic inter-island transport. This highlights the importance of a broader perspective in national and international transport systems to inform resilience investments.
Review
Geology
Emily M. Lane, Kristie-Lee Thomas, Darren N. King, Shaun Williams, Jose Borrero, William Power, Aditya Gusman
Summary: The study of the Kaikoura earthquake and tsunami provides an important opportunity for understanding and preventing tsunami disasters. Through interdisciplinary research, significant advancements have been made in tsunami hazard modeling, paleotsunami studies, risk assessment, and other aspects of tsunami science. However, further research is needed to address remaining questions and improve the management of tsunami risks.
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2023)
Article
Engineering, Civil
Laura Szczyrba, Yang Zhang, Duygu Pamukcu, Derya Ipek Eroglu, Robert Weiss
Summary: The study found that community vulnerabilities are the main predictors of structural damage in hurricane disasters, emphasizing the importance of considering both hazards and community vulnerabilities in post-disaster relief and pre-disaster mitigation efforts.
NATURAL HAZARDS REVIEW
(2021)
Article
Oceanography
Jun-Whan Lee, Jennifer L. Irish, Robert Weiss
Summary: In this study, a new tsunami model TRRF-INV is proposed to provide probabilistic estimates of a tsunami source and run-up distribution from a small number of run-up records. The model was tested in synthetic scenarios and a case study, showing reasonable estimation of tsunami source and run-up distribution. The TRRF-INV model has the potential to support accurate hazard assessment and provide new insights into tsunami source and impact.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Geochemistry & Geophysics
Robert Weiss, Jennifer Irish, Beverly Goodman Tchernov
Summary: This article presents a new model for studying the sensitivity of boulders, fluid flow, and environmental parameters through simulations, providing a better understanding of the process of boulder dislodgement.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Multidisciplinary Sciences
Patrick Lynett, Maile McCann, Zili Zhou, Willington Renteria, Jose Borrero, Dougal Greer, Ofa Fa'anunu, Cyprien Bosserelle, Bruce Jaffe, SeanPaul La Selle, Andrew Ritchie, Alexander Snyder, Brandon Nasr, Jacqueline Bott, Nicholas Graehl, Costas Synolakis, Behzad Ebrahimi, Gizem Ezgi Cinar
Summary: On the evening of January 15, 2022, the Hunga Tonga-Hunga Ha'apai volcano had a violent underwater eruption that resulted in a tsunami. This event generated waves through multiple mechanisms and has significant implications for coastal hazards in similar geophysical settings.
Review
Geosciences, Multidisciplinary
James Goff, Jose Borrero, Gabriel Easton
Summary: There is a growing number of reported palaeotsunami sites in the Pacific region, but researchers have seldom sought evidence beyond the immediate site. In the past 150 years, the region has experienced significant earthquakes and tsunamis from various sources. Using existing palaeotsunami data and numerical modelling, researchers identified the need to link search for tsunami evidence with modelling to find additional sites and understand the nature and extent of prehistoric events. They also highlighted the importance of focused research on key island archipelagos to enhance understanding of past events.
EARTH-SCIENCE REVIEWS
(2022)
Article
Oceanography
Jun-Whan Lee, Jennifer L. Irish, Robert Weiss
Summary: This paper presents a data-driven model called the TRRF-FF model for predicting alongshore near-field tsunami runup distribution in less than a second. The model is more flexible, occupies less storage space, and is faster and more reliable than real-time physics-based numerical simulation. Validation with synthetic tsunami scenarios and the 2011 Tohoku tsunami event in Japan shows that the TRRF-FF model outperforms a precomputed tsunami simulation database.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Geochemistry & Geophysics
Jose C. C. Borrero, Shane J. J. Cronin, Folauhola Helina Latu'ila, Pupunu Tukuafu, Nikolasi Heni, Ana Maea Tupou, Taaniela Kula, Ofa Fa'anunu, Cyprien Bosserelle, Emily Lane, Patrick Lynett, Laura Kong
Summary: On January 15th, 2022, the eruption of Hunga volcano in Tonga generated a violent eruption and a significant near-field tsunami. Despite its location along a tsunamigenic subduction zone, Tonga has limited records of significant tsunamis. However, a field team assessed the tsunami runup and inundation on Tongatapu and Eua islands, revealing widespread flooding. The low death toll can be attributed to evacuations, early warnings, and heightened tsunami awareness.
PURE AND APPLIED GEOPHYSICS
(2023)
Article
Geosciences, Multidisciplinary
Molly M. Range, Brian K. Arbic, Brandon C. Johnson, Theodore C. Moore, Vasily Titov, Alistair J. Adcroft, Joseph K. Ansong, Christopher J. Hollis, Jeroen Ritsema, Christopher R. Scotese, He Wang
Summary: This study presents the first global simulation of the Chicxulub impact tsunami and finds that the energy of this tsunami surpassed the 2004 Indian Ocean tsunami. Flow velocities exceeding 20 cm/s were observed along shorelines worldwide as well as in various open-ocean regions.
Article
Geochemistry & Geophysics
Vasily V. Titov
Summary: In the first 4 months of 2018, two fatal tsunamis hit Indonesian islands with devastating force, surprising local populations, tsunami warning systems, and scientists. International teams of scientists were sent to Indonesia to assist in collecting data and investigating the origins of these tsunamis, leading to a better understanding of tsunami genesis and improved guidance for more effective tsunami warning operations worldwide.
PURE AND APPLIED GEOPHYSICS
(2021)
Article
Public, Environmental & Occupational Health
Kristie-Lee Thomas, Lucy Kaiser, Emily Campbell, David Johnston, Hamish Campbell, Rana Solomon, Helen Jack, Jose Borrero, Ali Northern
AUSTRALIAN JOURNAL OF EMERGENCY MANAGEMENT
(2020)
Article
Geochemistry & Geophysics
Jose C. Borrero, Tubagus Solihuddin, Hermann M. Fritz, Patrick J. Lynett, Gegar S. Prasetya, Vassilios Skanavis, Semeidi Husrin, Kushendratno, Widjo Kongko, Dinar C. Istiyanto, August Daulat, Dim Purbani, Hadiwijaya L. Salim, Rahman Hidayat, Velly Asvaliantina, Maria Usman, Ardito Kodijat, Sangyoung Son, Costas E. Synolakis
PURE AND APPLIED GEOPHYSICS
(2020)