Article
Geochemistry & Geophysics
Jaime E. Delano, Rich W. Briggs, Christopher B. DuRoss, Ryan D. Gold
Summary: The study compares the use of physical scale bars with total station or GNSS control points to constrain SfM models for paleoseismic trench mapping. Despite slightly decreased accuracy, scale bars significantly simplify the workflow and eliminate the need for specialized survey equipment.
SEISMOLOGICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Nathaniel C. Miller, Daniel Lizarralde, John A. Collins, W. Steven Holbrook, Harm J. A. Van Avendonk
Summary: Seismic anisotropy measurements indicate that upper mantle hydration is limited to serpentinization and/or fault zones, not distributed uniformly, impacting important processes at the Middle America Trench; outer rise plate-bending faults may provide a pathway for seawater to rehydrate the slab mantle; hydration confined to fault zones reduces water storage estimates for the MAT upper mantle.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Y. Benjelloun, J. de Sigoyer, S. Garambois, J. Carcaillet, Y. Klinger
Summary: The study investigates the Holocene paleoseismic activity of the North Anatolian Fault (NAF) in the Marmara region, using high-resolution satellite imagery and terrestrial cosmogenic nuclide dating to map the middle strand. The research found evidence of multiple major ruptures and determined the horizontal slip rate in the area, suggesting that the last large earthquakes occurred between 1065 CE and the 14th-18th centuries CE, indicating a potential for future destructive seismic activity.
Article
Geochemistry & Geophysics
S. Shawn Wei, Philipp Ruprecht, Sydney L. Gable, Ellyn G. Huggins, Natalia Ruppert, Lei Gao, Haijiang Zhang
Summary: The Alaska Peninsula section of the Aleutian-Alaska subduction zone exhibits significant differences in plate coupling, seismic activity, and arc magmatism along its strike direction, with more fluids found in the southwestern region and more sediments subducted in the northeastern region. This suggests that the slab is more hydrated and undergoing more intensive dehydration in the southwest, while more sediments are subducted in the northeast.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geochemistry & Geophysics
Hui Peng, Dongli Zhang, Wenjun Zheng, Zhuqi Zhang, Haiyun Bi, Shumin Liang, Jingjun Yang
Summary: Studying paleoearthquake records in the northern boundary of the Ordos block reveals the recurrence behavior of large earthquakes in this region. The study finds that there are four normal faults in this area, and each fault has a different number of paleoearthquakes with remarkable periodicity. The fault network in this region exhibits clustered characteristics, with a large earthquake occurring approximately every 1300 years, but some faults may not experience earthquakes. Based on the most recent cluster, there is a possibility of a large earthquake occurring along the Sertengshan Piedmont Fault after the 849 CE earthquake, and further research is needed to assess the potential risk of future large earthquakes.
Article
Geochemistry & Geophysics
Cong Zhou, Kexu Shi, Pei Zhang, Xiangzhi Zeng, Meng Zhang
Summary: The study focuses on the coseismic velocity disturbance of small and medium earthquakes using seismic dense arrays. By relocating a repeating earthquake cluster near the 2018 Shimian earthquake and applying coda-wave interferometry methods, it is found that the velocity changes of coda waves strongly depend on frequency in the Shimian area. Low-frequency components of the coda waves are more sensitive to medium variations and negative velocity changes in low-frequency coda waves are likely attributed to the Shimian earthquake. It is recommended to have an average interstation spacing of seismic dense array less than 30 km for effective monitoring of coseismic changes of small and medium earthquakes.
SEISMOLOGICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Long Zhang, Jun Su, Weilai Wang, Lihua Fang, Jianping Wu
Summary: This study identifies and investigates repeating earthquakes in the Xianshuihe-Anninghe-Daliangshan Fault junction region in eastern Tibet, revealing the characteristics of deep fault slip and the potential seismic hazard.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Cristian Otarola, Sergio Ruiz, Carlos Herrera, Raul Madariaga, Cristian Siegel
Summary: Interplate thrust earthquakes near the trench at the base of the continental wedge in Northern Chile were compared to deeper intraplate events, with results showing smaller dynamic parameters for the interplate events. The studied area is suitable for nucleation of small to moderate earthquakes and does not pose a barrier for a future large tsunamigenic rupture.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Multidisciplinary Sciences
Feng Shi, Yanbin Wang, Jianguo Wen, Tony Yu, Lupei Zhu, Taizi Huang, Kelin Wang
Summary: Studies have shown that intermediate-depth earthquakes in subducted oceanic slabs often form a double band of seismicity. While the upper band is thought to be facilitated by dehydration reactions, the faulting mechanism of the lower band of seismicity (LBS) remains controversial. This study uses controlled deformation experiments and acoustic emission detection to simulate the mechanical behavior of metamorphosing olivine in the subducted mantle lithosphere. The results suggest that metamorphosing olivine likely plays an important role in intraslab earthquake processes.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Multidisciplinary Sciences
Yuta Mitsui, Hinako Muramatsu, Yusaku Tanaka
Summary: Slow deformations associated with a subducting slab can affect quasi-static displacements and seismicity over a wide range of depths. Our study in the Tonga subduction zone found that transient displacements and quiescence of deep earthquakes were bounded in time by large intraslab earthquakes in 2009 and 2013. The slow deformation event between 2009 and 2013 may have been triggered by a distant and shallow M8.1 earthquake, providing new insights into the relationship between shallow and deep earthquakes in the subduction zone.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Valenti Sallares, Manel Prada, Sebastian Riquelme, Adria Melendez, Alcinoe Calahorrano, Ingo Grevemeyer, Cesar R. Ranero
Summary: This passage explains the mechanism of large earthquake ruptures causing tsunamis, suggesting that large slip on faults may be influenced by depth-dependent rock rigidity variations. By studying the rupture zone of the 1992 Nicaragua tsunami earthquake, a self-consistent model about the characteristics of tsunami earthquakes was obtained, which opens up new possibilities for improving tsunami hazard assessment.
Article
Geology
Harold J. Tobin, Demian M. Saffer, David A. Castillo, Takehiro Hirose
Summary: This study successfully constrained the in situ pore pressure and stress state in the deep interior of an accretionary wedge using data from drilling in the Nankai subduction zone. The estimated stress components helped reveal the tectonic stress characteristics in the region, indicating a normal or strike-slip faulting regime with low stress variations.
Article
Multidisciplinary Sciences
Abhishek Prakash, Caleb W. Holyoke III, Peter B. Kelemen, Stephen H. Kirby, Andreas K. Kronenberg, William M. Lamb
Summary: This study evaluates a model for intermediate-depth earthquakes in subduction zones based on shear localization, shear heating, and runaway creep within thin carbonate layers. The model suggests that thermal shear instabilities in carbonate lenses can contribute to intermediate-depth seismicity. Alteration of peridotites in subducting plates and the overlying mantle wedge by CO2-bearing fluids may lead to the formation of carbonate minerals. The model predicts conditions of stable and unstable shear, with strain rates comparable to seismic velocities, and provides an alternative to dehydration embrittlement as a mechanism for intermediate-depth earthquakes.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Geosciences, Multidisciplinary
Qiushi Zhai, Zhigang Peng, Makoto Matsubara, Kazushige Obara, Yanbin Wang
Summary: This study investigates the spatiotemporal changes of intermediate-depth earthquakes in the double seismic zone beneath Central and Northeastern Japan before and after the 2011 Tohoku earthquake. The results show a clear increase in intermediate-depth earthquake rate following the Tohoku earthquake, with higher aftershock productivity in the upper plane compared to the lower plane.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Dongdong Tian, S. Shawn Wei, Wei Wang, Fan Wang
Summary: This study successfully analyzed the source spectra and stress drops of intermediate-depth and deep earthquakes in the Tonga slab. The results showed that the stress drops of Tonga earthquakes vary with depth and exhibit spatial variations. The findings support the hypothesis of fluid-related embrittlement for both groups of earthquakes.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Anna Pfohl, Linda M. Warren, Stefany Sit, Michael Brudzinski
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2015)
Article
Geochemistry & Geophysics
Linda M. Warren, Elena C. Baluyut, Timothy Osburg, Kristen Lisac, Siiri Kokkinen
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2015)
Article
Geochemistry & Geophysics
Linda M. Warren, J. Arthur Snoke, David E. James
EARTH AND PLANETARY SCIENCE LETTERS
(2008)
Article
Geochemistry & Geophysics
S. W. French, L. M. Warren, K. M. Fischer, G. A. Abers, W. Strauch, J. M. Protti, V. Gonzalez
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2010)
Article
Geochemistry & Geophysics
Linda M. Warren, Susan L. Beck, C. Berk Biryol, George Zandt, A. Arda Ozacar, Yingjie Yang
GEOPHYSICAL JOURNAL INTERNATIONAL
(2013)
Article
Geochemistry & Geophysics
J. Arthur Snoke, Linda M. Warren, David E. James
GEOPHYSICAL JOURNAL INTERNATIONAL
(2014)
Article
Geochemistry & Geophysics
Linda M. Warren
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2010)
Article
Geochemistry & Geophysics
R. Myhill, L. M. Warren
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2012)
Article
Geochemistry & Geophysics
Ryan Porter, Hersh Gilbert, George Zandt, Susan Beck, Linda Warren, Josh Calkins, Patricia Alvarado, Megan Anderson
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2012)
News Item
Geosciences, Multidisciplinary
Linda M. Warren
Article
Geochemistry & Geophysics
Linda M. Warren
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2014)
Article
Geochemistry & Geophysics
Y. Chang, L. M. Warren, L. Zhu, G. A. Prieto
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2019)
Article
Geosciences, Multidisciplinary
Brandon T. Bishop, Sungwon Cho, Linda Warren, Lillian Soto-Cordero, Patricia Pedraza, German A. Prieto, Viviana Dionicio
Summary: The recycling of water into the Earth's mantle through hydrated oceanic lithosphere is important in subduction zone seismicity at intermediate depths. Observations have shown that normal faulting causes hydration in the lithosphere, but it cannot explain the separation between Wadati-Benioff zone planes or the spatial variability of the lower plane. This study proposes that intraplate deformation of older lithosphere drives deeper hydration. By examining a specific earthquake in Colombia, the researchers found evidence of lithosphere rupture and hydration of the mantle, supporting their hypothesis.
Article
Geochemistry & Geophysics
Ying Chang, Linda M. Warren, German A. Prieto
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2017)