Results 11 to 20 of about 231,836 (205)

Coulomb stress change on inland faults during megathrust earthquake cycle in southwest Japan [PDF]

Earth, Planets and Space, 2020
In the subduction zone, megathrust earthquakes may modulate the shallow crustal seismicity in the overriding plate. Historical documents indicate the frequent occurrence of large shallow crustal earthquakes in the overriding continental plate 50 years ...
Tsukasa Mitogawa, Takuya Nishimura
doaj   +2 more sources

The 2016 Mw 5.9 earthquake off the southeastern coast of Mie Prefecture as an indicator of preparatory processes of the next Nankai Trough megathrust earthquake

Progress in Earth and Planetary Science, 2018
Megathrust earthquakes have occurred repeatedly at intervals of 100 to 150 years along the Nankai Trough, situated in the southwest of Japan. Given that it has been 70 years since the last event, the occurrence of the next devastating earthquake is ...
Masaru Nakano, Mamoru Hyodo, Ayako Nakanishi, Mikiya Yamashita, Takane Hori, Shin-ichiro Kamiya, Kensuke Suzuki, Takashi Tonegawa, Shuichi Kodaira, Narumi Takahashi, Yoshiyuki Kaneda   +10 more
doaj   +2 more sources

Asthenosphere Flow Modulated by Megathrust Earthquake Cycles [PDF]

Geophysical Research Letters, 2018
Abstract Subduction megathrusts develop the largest earthquakes, often close to large population centers. Understanding the dynamics of deformation at subduction zones is therefore important to better assess seismic hazards. Here I develop consistent earthquake cycle simulations that incorporate localized and distributed deformation ...
Sylvain Barbot, Barbot, Sylvain
core   +7 more sources

Offshore Landward Motion Shortly After a Subduction Earthquake Implies Rapid Relocking of the Shallow Megathrust [PDF]

Geophysical Research Letters, 2023
Geodetic observations after large subduction earthquakes reflect multiple postseismic processes, including megathrust relocking. The timing of relocking and the observational constraints on it are unclear.
Mario D’Acquisto, Rob Govers
doaj   +3 more sources

Continuing megathrust earthquake potential in Chile after the 2014 Iquique earthquake [PDF]

Nature, 2014
The seismic gap theory identifies regions of elevated hazard based on a lack of recent seismicity in comparison with other portions of a fault. It has successfully explained past earthquakes (see, for example, ref. 2) and is useful for qualitatively describing where large earthquakes might occur.
Hayes, Gavin P., Herman, Matthew W., Barnhart, William D., Furlong, Kevin P., Riquelme Muñoz, Sebastián, Benz, Harley M., Bergman, Eric, Barrientos, Sergio, Earle, Paul S., Samsonov, Sergey   +9 more
openaire   +6 more sources

Impact of Upper‐Plate Faulting on Megathrust Foreshocks: Insights From the 2014 Iquique Earthquake [PDF]

Geophysical Research Letters
The role of upper‐plate faulting in the seismic cycle of large megathrust earthquakes remains poorly understood. We use quasi‐dynamic numerical simulations of seismic cycles to analyze the interaction between crustal faulting and the foreshock sequence ...
J. Julve, M. Moreno, S. Barbot, A. Tassara   +3 more
doaj   +2 more sources

Change of deep subduction seismicity after a large megathrust earthquake. [PDF]

Nat Commun, 2023
Abstract Subduction zones are home to the world’s largest and deepest earthquakes. Recently, large-scale interactions between shallow (0-60 km) and intermediate (80-150 km) seismicity have been evidenced during the interseismic period but also before and after megathrust earthquakes along with large-scale changes in surface motion ...
Gardonio B, Marsan D, Bodin T, Socquet A, Durand S, Radiguet M, Ricard Y, Schubnel A.   +7 more
europepmc   +7 more sources

An unexplained tsunami: Was there megathrust slip during the 2020 Mw7.6 Sand Point, Alaska, earthquake? [PDF]

Seismica
On October 19, 2020, the Mw7.6 Sand Point earthquake struck south of the Shumagin Islands in Alaska. Moment tensors indicate the earthquake was primarily strike-slip, yet the event produced an enigmatic tsunami that was larger and more widespread than ...
Sean Santellanes, Dara Goldberg, Pablo Koch, Diego Melgar, William Yeck, Brendan Crowell, Jiun-Ting Lin   +6 more
doaj   +2 more sources

Azimuthal Seismic Anisotropy in the Upper Crust of the Japanese Islands Induced by the 2011 Tohoku‐Oki Megathrust Earthquake

Geophysical Research Letters, 2018
We investigated VP/VS changes in the upper crust of the Japanese islands after the 2011 MW9.0 Tohoku‐Oki megathrust earthquake. Abrupt VP/VS changes with azimuth‐dependent variations were observed after the megathrust earthquake. The VP/VS changes ranged
Ilgoo Kim, Tae‐Kyung Hong
doaj   +2 more sources

Global variations of large megathrust earthquake rupture characteristics. [PDF]

Sci Adv, 2018
Regional patterns of large earthquake rupture complexity are revealed by a new measure, REEF (radiated energy enhancement factor).
Ye L, Ye L, Kanamori H, Lay T.
europepmc   +7 more sources