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
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)
Article
Geochemistry & Geophysics
Lingling Ye, Yefei Bai, Daojun Si, Thorne Lay, Kwok Fai Cheung, Hiroo Kanamori
Summary: A strong earthquake occurred on the Semidi segment of the plate boundary along the Alaska Peninsula on July 29, 2021, re-rupturing part of the 1938 rupture zone. Analysis of seismic and tsunami data provides detailed information about the 2021 rupture process.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
E. Klein, B. Potin, F. Pasten-Araya, R. Tissandier, K. Azua, Z. Duputel, C. Herrera, L. Rivera, J. M. Nocquet, J. C. Baez, D. Zigone, R. Madariaga, J. P. Ampuero, S. Ruiz, C. Vigny
Summary: An earthquake sequence, including a mainshock of magnitude M-w = 6.9 followed by a M-w = 6.4 aftershock, occurred in the Atacama region of Chile in September 2020. Dynamic inversions show that the two largest earthquakes are located on the subduction interface. High rate GPS data allowed for the determination of instantaneous coseismic displacements and inference of coseismic slip models.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
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
M. W. Herman, K. P. Furlong, H. M. Benz
Summary: This article investigates the relationship between surface faulting and subduction megathrust rupture in the 2016 Kaikoura earthquake in New Zealand. The study finds that the slip in the upper plate fault coincides with the megathrust rupture, and this extreme faulting is a result of increased Coulomb stress and basal decoupling.
Article
Geochemistry & Geophysics
M. W. Herman, K. P. Furlong, H. M. Benz
Summary: The 2016 Kaikoura earthquake in New Zealand occurred in the southern end of the Hikurangi subduction zone. This earthquake caused substantial deformation in the upper plate of the subduction zone, and the greatest fault slip in the upper plate coincided with the megathrust rupture. The combination of increased Coulomb stress and basal decoupling resulted in the extreme co-seismic upper plate faulting observed in this earthquake.
Article
Engineering, Marine
Mohammad Heidarzadeh, Iyan E. Mulia
Summary: The July 2020 tsunami in Alaska exhibited very long period waves (51-64 min) and a small coastal amplitude (-0.5 m), likely attributed to the deep focal depth of the earthquake and the extremely shallow water around the source region.
Article
Geosciences, Multidisciplinary
Horng-Yue Chen, Ya-Ju Hsu, Ryoya Ikuta, Hsin Tung, Chi-Hsien Tang, Chin-Shang Ku, Hsuan-Han Su, Pei-Ru Jian, Masataka Ando, Toshiaki Tsujii
Summary: Using GNSS-acoustic measurements, the deformation pattern of the southern Ryukyu subduction zone has been studied. The data suggests that the subduction interface is capable of hosting M-w 7.5-8.4 earthquakes. The orientations of seafloor movement and P-axes deviate from the direction of plate convergence, indicating possible slip-partitioning.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Multidisciplinary Sciences
Benedikt Braszus, Saskia Goes, Rob Allen, Andreas Rietbrock, Jenny Collier, Nick Harmon, Tim Henstock, Stephen Hicks, Catherine A. Rychert, Ben Maunder, Jeroen van Hunen, Lidong Bie, Jon Blundy, George Cooper, Richard Davy, J. Michael Kendall, Colin Macpherson, Jamie Wilkinson, Marjorie Wilson
Summary: Researchers used seismic imaging to locate subducted plates in the Caribbean region, revealing the subduction history of different ages and accumulation patterns at various depths, as well as uncovering significant geological events in the evolution of the plates. New ocean-bottom seismometer data from the Lesser Antilles provided insights into the subducted spreading centers and faults, enhancing the understanding of Caribbean plate tectonic evolution.
NATURE COMMUNICATIONS
(2021)
Article
Geochemistry & Geophysics
Takashi Tonegawa, Shunsuke Takemura, Suguru Yabe, Kiyoshi Yomogida
Summary: Fluid migration plays a crucial role in slow and megathrust earthquakes in subduction zones. This study shows that transient changes in seismic heterogeneity occur before shallow slow earthquakes in the Nankai subduction zone, Japan. The changes in heterogeneity primarily occur in the margin of the source region, indicating dynamic fluid migration. The timing of these changes reflects the pore pressure level in the corresponding source region.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geosciences, Multidisciplinary
Rishav Mallick, Aron J. Meltzner, Louisa L. H. Tsang, Eric O. Lindsey, Lujia Feng, Emma M. Hill
Summary: A 32-year-long slow-slip event occurred on a shallow part of the Sunda megathrust, perhaps because of stress accumulation after fluid expulsion, according to an analysis of the deformation history of the area and physics-based simulations. This study highlights the potential for missing or mis-modelling these transient phenomena globally and provides a method for detecting slow-slip events that could substantially revise earthquake and tsunami hazard and risk assessments for populations living near fault lines.
Article
Geosciences, Multidisciplinary
C. M. Tewksbury-Christle, W. M. Behr
Summary: Low Velocity Zones (LVZs) with high Vp-Vs ratios are commonly found along the downdip extents of modern subduction zones, collocated with complex seismic and transient deformation patterns. They are attributed to high pore fluid pressures, but the spatial correlation between LVZs and the subduction interface, as well as the rock types defining them, remain unclear. This study characterizes the seismic signature of a fossil subduction interface shear zone in northern California sourced from the same depth range as modern LVZs, suggesting that LVZs may represent the subduction interface shear zone to some extent.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Hannah F. Mark, Daniel Lizarralde, Douglas A. Wiens
Summary: Subduction zones play a crucial role in connecting the surface water cycle with the solid Earth, but the uncertainty in water fluxes from the surface to subsurface reservoirs over geological time is high. This is due to the poorly constrained volume of water carried in hydrous minerals in the slab mantle. By measuring seismic anisotropy near the Marianas Trench and using spatial variations in anisotropy, we were able to determine the lower bound on slab mantle water content for the case where serpentinization is confined within fault zones.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
Luigi Passarelli, Paul Antony Selvadurai, Eleonora Rivalta, Sigurjon Jonsson
Summary: The study shows that slow slip events (SSEs) can lead to aseismic strain release along with seismic tremor and earthquake swarms. Larger SSEs tend to last longer and are associated with more intense tremor activity. There is a correlation between aseismic and seismic moment release, with shallower SSEs producing larger seismic moment release than deeper SSEs.
Editorial Material
Geochemistry & Geophysics
Hiroo Kanamori, Luis Rivera, Sophie Lambotte
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
F. Pasten-Araya, B. Potin, K. Azua, M. Saez, F. Aden-Antoniow, S. Ruiz, L. Cabrera, J. P. Ampuero, J. M. Nocquet, L. Rivera, Z. Duputel
Summary: The along-dip influence of the Copiapo ridge subduction in the Atacama region, North-Central Chile was studied by analyzing a new seismicity catalog and obtaining a 3-D tomographic model. Four distinct segments were identified along the dip, with variations in velocity models indicating the presence of fluids coinciding with aseismic slip zones. These differences in seismogenic behavior are believed to be generated by the subduction of heterogeneous seamounts associated with the Copiapo ridge.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Editorial Material
Radiology, Nuclear Medicine & Medical Imaging
Leonardo A. Rivera-Rivera
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2022)
Article
Cardiac & Cardiovascular Systems
Brandon G. Fico, Kathleen B. Miller, Leonardo A. Rivera-Rivera, Adam T. Corkery, Andrew G. Pearson, Nicole A. Eisenmann, Anna J. Howery, Howard A. Rowley, Kevin M. Johnson, Sterling C. Johnson, Oliver Wieben, Jill N. Barnes
Summary: Age and aortic stiffness are significant predictors of cerebral artery pulsatility index in healthy adults.
FRONTIERS IN CARDIOVASCULAR MEDICINE
(2022)
Article
Environmental Sciences
Rosibel Rodriguez-Bolanos, Ricardo Baruch-Dominguez, Edna Arillo-Santillan, Elsa Yunes-Diaz, Leonor Rivera-Rivera, Lizeth Cruz-Jimenez, James F. Thrasher, Alan G. Nyitray, Eduardo Lazcano-Ponce
Summary: Men who have sex with men (MSM) are more likely to use drugs and substances compared to heterosexual individuals. This study used latent class analysis to identify subgroups of MSM with specific substance use patterns and examined their associations with sexual behaviors.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(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)
Editorial Material
Radiology, Nuclear Medicine & Medical Imaging
Leonardo A. Rivera-Rivera
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2023)
Article
Neurosciences
Leonardo A. Rivera-Rivera, Steve Kecskemeti, Mu-Lan Jen, Zachary Miller, Sterling C. Johnson, Laura Eisenmenger, Kevin M. Johnson
Summary: Neurovascular 4D-Flow MRI is a powerful tool for cerebrovascular hemodynamic characterization. However, motion-induced bias can confound the hemodynamic markers. This study develops a high fidelity 3D self-navigation approach for motion correction and demonstrates improved image quality and reduced measurement bias.
Article
Geochemistry & Geophysics
E. Klein, C. Vigny, Z. Duputel, D. Zigone, L. Rivera, S. Ruiz, B. Potin
Summary: Using survey GPS measurements, the first deep slow slip event (SSE) was detected in Chile in 2014-2016.5. Similar events had occurred twice before in 2006 and 2010, suggesting a 5-year repeat time. In anticipation of the next event expected for 2020, the existing continuous GNSS network in the region was densified with 5 new stations in early 2019. The SSE occurred in 2020 as expected, but was perturbed by the 2020 Atacama seismic sequence.
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2023)
Article
Psychiatry
Cesar Merino-Soto, Miguel Angel Nunez Benitez, Miriam Teresa Dominguez-Guedea, Filiberto Toledano-Toledano, Jose Moral de la Rubia, Claudia I. Astudillo-Garcia, Leonor Rivera-Rivera, Ahidee Leyva-Lopez, Marisol Angulo-Ramos, Omar Arodi Flores Laguna, Gregorio Hernandez-Salinas, Jorge Homero Rodriguez Castro, Juan Garduno Espinosa, Omar Israel Gonzalez Pena, Juan Garduno Espinosa
Summary: The purpose of this study was to determine the psychometric properties of the Medical outcomes study-social support survey (MOS-SSS) in patients with chronic disease in primary health care. The results indicated that the measurement tool is unidimensional, and the shortened version is valid and reliable for measuring social support.
FRONTIERS IN PSYCHIATRY
(2023)
Article
Multidisciplinary Sciences
Ricardo Garza-Giron, Thorne Lay, Frederick Pollitz, Hiroo Kanamori, Luis Rivera
Summary: The rapid release of volcanic material during the Tonga eruption on January 15, 2022 generated significant downward forces on the Earth, resulting in observed seismic waves throughout the planet for about 4.5 hours. Analysis of teleseismic P waves and Rayleigh waves with periods below 50 s provides insight into the eruption process. The eruption also produced acoustic-gravity Lamb waves that caused ground motions and tsunami waves, while atmospheric standing acoustic waves near the source excited resonant solid Earth Rayleigh wave motions.
Article
Public, Environmental & Occupational Health
Jose Alberto Gomez-Garcia, Leonor Rivera-Rivera, Claudia Iveth Astudillo-Garcia, Lorena Elizabeth Castillo-Castillo, Silvia Morales-Chaine, Diana Iris Tejadilla-Orozco
Summary: The study aimed to estimate the prevalence of suicidal ideation (SI) in the Mexican population during the Covid-19 pandemic and its association with social determinants (SD). The results showed a prevalence of 17.1% for SI, with higher rates among women than men. The main associated SDs included being a woman, young women, education, single status, unemployment, social distancing, living alone, loss of family member due to Covid-19, depression diagnosis, physical violence, excessive alcohol consumption, drug use, and suspicion or diagnosis of Covid-19. The study highlights the importance of structural and intermediate SDs that influence SI.
SALUD PUBLICA DE MEXICO
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Grant S. Roberts, Carson A. Hoffman, Leonardo A. Rivera-Rivera, Sara E. Berman, Laura B. Eisenmenger, Oliver Wieben
Summary: The primary goal of this study is to develop a robust quantitative velocity tool (QVT) for cranial 4D flow MRI post-processing. The QVT utilizes threshold-based segmentation techniques and includes an interactive 3D display for simplified vessel selection and automated hemodynamic visualization. The QVT showed improved segmentation quality, better quantification performance, and significantly reduced post-processing time compared to previous approaches.
MAGNETIC RESONANCE IMAGING
(2023)
Article
Health Care Sciences & Services
Leonor Rivera Rivera, Marina Seris Martinez, Luz Myriam Reynales Shigematsu, Jose Alberto Gomez Garcia, Fernando Austria Corrales, Filiberto Toledano-Toledano, Alberto Jimenez Tapia, Diana Iris Tejadilla Orozco, Claudia I. Astudillo I. Garcia
Summary: This study in Mexico investigated the prevalence of domestic violence against women during the COVID-19 pandemic. Data from a remote survey of 47,819 women were analyzed using regression models. The prevalence of violence was 11.5%, with fluctuations over time. Factors associated with violence included unemployment, quarantine measures, caregiving responsibilities, loss of family members to COVID-19, and binge drinking. The study highlighted how confinement measures exacerbated gender inequalities and economic hardships, leading to increased violence against women.
Article
Geosciences, Multidisciplinary
Catalina Morales-Yanez, Zacharie Duputel, Luis Rivera
Summary: The moderate seismic region of Comoros has experienced unusual seismic activity since May 2018, leading to the discovery of a new submarine volcano. The study suggests that the observed non-double-couple events are likely due to unmodeled shallow structural heterogeneities, while most earthquakes have a strike-slip mechanism caused by the upward magma transfer.
COMPTES RENDUS GEOSCIENCE
(2022)