Article
Geochemistry & Geophysics
Keisuke Ariyoshi
Summary: The paper explores the migration of slow earthquakes on natural faults and presents quantitative relationships and characteristic slip distances based on simulation and observational results. It also discusses the friction and stress changes associated with these phenomena.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Review
Geochemistry & Geophysics
N. Uchida, R. Burgmann
Summary: Research has shown that there were indications of a potential great megathrust earthquake in NE Japan before the 2011 Tohoku earthquake, but a consensus assessment of the hazard was lacking. Since the earthquake, studies have made significant progress in revealing aspects such as coseismic rupture, aftershocks, and slow earthquakes.
REVIEWS OF GEOPHYSICS
(2021)
Article
Geochemistry & Geophysics
B. Gombert, J. C. Hawthorne
Summary: Slow earthquakes can have varying durations, moments, and slip and propagation speeds. This study examines tremor bursts with durations between 1 and 30 minutes, which are likely driven by short bursts of aseismic slip. Using a coherence-based technique, thousands of tremor bursts beneath Vancouver Island in Cascadia are detected, and 17 of the ruptures are examined. The study finds that tremor migrates at rates of 3-25 m/s, filling a gap in the spectrum of observed slow earthquakes and suggesting the existence of faster slip and propagation in smaller ruptures.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geosciences, Multidisciplinary
Xiaoran Lv, Falk Amelung, Yun Shao
Summary: InSAR time series data analysis reveals up to 20 cm of radar line-of-sight displacements in the area of the 2013 Mw 7.7 Balochistan earthquake in southwest Pakistan. This surface displacement is caused by a 5,500-km(2)-wide subhorizontal patch of the megathrust fault exhibiting about 80 cm of aseismic slip. The triggered aseismic slip suggests that this section of the megathrust is decoupled, and the seismic potential of the subduction zone is fully locked up to a distance of 220 km from the trench.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Zaccaria El Yousfi, Mathilde Radiguet, Baptiste Rousset, Allen Husker, Ekaterina Kazachkina, Vladimir Kostoglodov
Summary: In the Mexican subduction zone, slow slip events with various durations have been observed, accompanied by microseismicity. By analyzing a 10-year tremor catalog, this study identified clusters of short-lasting slip events occurring during tremor times, which contribute to large slow slip events. In addition, low amplitude transients lasting 8 - 9 days were also found to occur at tremor times and locations.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Keisuke Yoshida, Naoki Uchida, Yoshiaki Matsumoto, Masaki Orimo, Tomomi Okada, Satoshi Hirahara, Shuutoku Kimura, Ryota Hino
Summary: A M-w 6.2 earthquake occurred in Suzu, northeastern Noto Peninsula, Japan, on May 5, 2023, following a 2.5-year intense earthquake swarm. The mainshock rupture was initiated near the shallow end of the preceding swarm earthquakes, with systematic upward migration likely caused by fluid movement. The results emphasize the importance of monitoring swarm events, as they can lead to large and dangerous earthquakes.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Carl Tape, Anthony Lomax
Summary: This study revisits five earthquakes along the Aleutian-Alaska subduction plate boundary through probabilistic relocation of mainshocks and aftershocks. Significant differences in aftershock regions were found, shedding light on the relationship between seismic events and geological structures.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geology
Ehsan Kosari, Matthias Rosenau, Sabrina Metzger, Onno Oncken
Summary: Understanding the seismogenic behavior of megathrusts is crucial for predicting seismic hazards in subduction zones. However, the relationship between frictional heterogeneity at depth and upper-plate deformation is not fully understood. Using a seismotectonic model, we found that the frictional locking heterogeneity generates segmented along-strike strain patterns in the short term but less pronounced permanent strain patterns in the long term. Our results suggest that along-strike upper-plate strain patterns can help interpret lateral variations in seismogenic behavior.
Article
Chemistry, Multidisciplinary
Baoyintu, Naren Mandula, Hiroshi Kawase
Summary: This study used Green's function summation method and randomly perturbed asperity sources to predict strong ground motions and building damage that may be caused by earthquakes along the southern coast of western Japan. The results suggest that regions close to the seismic source and areas with thick sediments may experience more severe damage, and buildings constructed before 1981 are more likely to be affected.
APPLIED SCIENCES-BASEL
(2021)
Article
Geosciences, Multidisciplinary
John B. B. DeSanto, Spahr C. C. Webb, Scott L. L. Nooner, David A. A. Schmidt, Brendan W. W. Crowell, Benjamin A. A. Brooks, Todd L. L. Ericksen, C. David Chadwell
Summary: The Mw7.8 Simeonof earthquake on July 22, 2020 ruptured along the Shumagin segment of the Alaska-Aleutian subduction zone. Observations from a seafloor geodetic GNSS-Acoustic site IVB1, located approximately 250 km from the earthquake, showed a velocity of 3.78 ± 1.15 cm/yr prior to the earthquake and a coseismic offset of 0.6 ± 0.7 cm eastward and -15.5 ± 0.8 cm northward. The analysis of the data confirmed that the Simeonof earthquake was a deep megathrust event and suggested significant strain accumulation prior to the earthquake.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Yu Jiang, Pablo J. Gonzalez, Roland Burgmann
Summary: In 2020, a doublet of earthquakes occurred in the Alaska-Aleutian subduction zone. The first earthquake ruptured a seismic gap that had not experienced large earthquakes since 1917, and the second earthquake broke a trench-perpendicular fault. Geodetic inversions were used to analyze the fault slip distributions of the earthquakes and revealed the segmented structure of the seismic gap.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
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)
Review
Astronomy & Astrophysics
Maureen A. L. Walton, Lydia M. Staisch, Tina Dura, Jessie K. Pearl, Brian Sherrod, Joan Gomberg, Simon Engelhart, Anne Trehu, Janet Watt, Jon Perkins, Robert C. Witter, Noel Bartlow, Chris Goldfinger, Harvey Kelsey, Ann E. Morey, Valerie J. Sahakian, Harold Tobin, Kelin Wang, Ray Wells, Erin Wirth
Summary: The Cascadia Subduction Zone has recorded at least 19 great megathrust earthquakes over the past 10,000 years and is a significant geologic environment for understanding natural hazards. Despite uncertainties, exploring models of earthquake recurrence can help in reducing societal impacts and improving scientific knowledge. Integrating diverse datasets and focusing on geological processes may lead to major progress in addressing outstanding questions about CSZ earthquakes.
ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES, VOL 49, 2021
(2021)
Article
Automation & Control Systems
Diego Gutierrez-Oribio, Yury Orlov, Ioannis Stefanou, Franck Plestan
Summary: This paper addresses the output boundary tracking problem for a wave partial differential equation with uncertain multiplicative parameters and additive boundary and in-domain terms. It proposes a homogeneous boundary feedback controller using only collocated boundary measurements, achieving global exponential Input-to-State Stability (eISS) of the closed-loop system and insensitivity to matched disturbances. The proposed homogeneity-based strategy is further evaluated in a simplified earthquake model for controlled dissipation of its stored energy and producing slow-aseismic response. The study has important applications in earthquake prevention, renewable energy production, and storage.
SYSTEMS & CONTROL LETTERS
(2023)
Article
Geochemistry & Geophysics
Hanaya Okuda, Matt J. Ikari, Alexander Roesner, Katja Stanislowski, Andre Hupers, Asuka Yamaguchi, Achim J. Kopf
Summary: The study conducted experiments with sediment samples from the Nankai Trough in different locations, finding that the friction coefficient is inversely correlated with clay mineral content, with outer prism sediments exhibiting higher coefficients. All samples exhibited velocity-weakening behavior at low velocities, but outer prism and deep inner prism sediments showed velocity strengthening at higher velocities.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Masayuki Kano, Shin'ichi Miyazaki, Yoichi Ishikawa, Yoshihisa Hiyoshi, Kosuke Ito, Kazuro Hirahara
GEOPHYSICAL JOURNAL INTERNATIONAL
(2015)
Article
Geosciences, Multidisciplinary
Shuji Yamagiwa, Shin'ichi Miyazaki, Kazuro Hirahara, Yukitoshi Fukahata
GEOPHYSICAL RESEARCH LETTERS
(2015)
Article
Geochemistry & Geophysics
Kazuki Koketsu, Yusuke Yokota, Naoki Nishimura, Yuji Yagi, Shin'ichi Miyazaki, Kenji Satake, Yushiro Fujii, Hiroe Miyake, Shin'ichi Sakai, Yoshiko Yamanaka, Tomomi Okada
EARTH AND PLANETARY SCIENCE LETTERS
(2011)
Article
Geosciences, Multidisciplinary
Shin'ichi Miyazaki, Jeffery J. McGuire, Paul Segall
EARTH PLANETS AND SPACE
(2011)
Article
Geosciences, Multidisciplinary
Yukitoshi Fukahata, Yuji Yagi, Shin'ichi Miyazaki
EARTH PLANETS AND SPACE
(2012)
Article
Geosciences, Multidisciplinary
Masayuki Kano, Shin'ichi Miyazaki, Kosuke Ito, Kazuro Hirahara
EARTH PLANETS AND SPACE
(2013)
Article
Geochemistry & Geophysics
Hidayat Panuntun, Shin'ichi Miyazaki, Yoichi Fukuda, Yoshiaki Orihara
GEOPHYSICAL JOURNAL INTERNATIONAL
(2018)
Article
Geochemistry & Geophysics
Ryoko Nakata, Shin'ichi Miyazaki, Mamoru Hyodo, Takane Hori
MARINE GEOPHYSICAL RESEARCH
(2014)
Article
Geochemistry & Geophysics
Takane Hori, Mamoru Hyodo, Shin'ichi Miyazaki, Yoshiyuki Kaneda
MARINE GEOPHYSICAL RESEARCH
(2014)
Article
Oceanography
Takane Hori, Mamoru Hyodo, Ryoko Nakata, Shin'ichi Miyazaki, Yoshiyuki Kaneda
Article
Geochemistry & Geophysics
Masayuki Kano, Jun'ichi Fukuda, Shin'ichi Miyazaki, Mamoru Nakamura
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2018)
Article
Geosciences, Multidisciplinary
Yusuke Tanaka, Yusaku Ohta, Shin'ichi Miyazaki
GEOPHYSICAL RESEARCH LETTERS
(2019)
Article
Geosciences, Multidisciplinary
Megumi Fujita, Takuya Nishimura, Shin'ichi Miyazaki
EARTH PLANETS AND SPACE
(2019)
Article
Mechanics
Takane Hori, Shin'ichi Miyazaki, Mamoru Hyodo, Ryoko Nakata, Yoshiyuki Kaneda
THEORETICAL AND APPLIED MECHANICS JAPAN
(2014)