Results 21 to 30 of about 4,834 (215)

Precise Monitoring of Pore Pressure at Boreholes Around Nankai Trough Toward Early Detecting Crustal Deformation

Frontiers in Earth Science, 2021
In our recent study, we detected the pore pressure change due to the slow slip event (SSE) in March 2020 at the two borehole stations (C0002 and C0010), where the other borehole (C0006) close to the Nankai Trough seems not because of instrumental drift ...
Keisuke Ariyoshi, Toshinori Kimura, Yasumasa Miyazawa, Sergey Varlamov, Takeshi Iinuma, Akira Nagano, Joan Gomberg, Joan Gomberg, Eiichiro Araki, Toru Miyama, Kentaro Sueki, Shuichiro Yada, Takane Hori, Narumi Takahashi, Shuichi Kodaira   +14 more
doaj   +1 more source

Recovery of the recurrence interval of Boso slow slip events in Japan

Earth, Planets and Space, 2019
We present the spatiotemporal evolution of the Boso slow slip event with a moment of 20 × 1018 N m that occurred in June 2018; such events, which have a duration of 1–2 weeks, have repeatedly occurred off the Boso peninsula, east Japan.
Shinzaburo Ozawa, Hiroshi Yarai, Tomokazu Kobayashi   +2 more
doaj   +1 more source

Bridging the gap between low-frequency and very-low-frequency earthquakes

Earth, Planets and Space, 2020
Slow earthquakes that are observed in the > 1 Hz frequency band are called tectonic tremor or low-frequency earthquakes (LFEs) and those in the 0.01–0.10 Hz band are called very-low-frequency earthquakes (VLFEs).
Koki Masuda, Satoshi Ide, Kazuaki Ohta, Takanori Matsuzawa   +3 more
doaj   +1 more source

Evidence of Localized Failure Along Altered Basaltic Blocks in Tectonic Mélange at the Updip Limit of the Seismogenic Zone: Implications for the Shallow Slow Earthquake Source

Geochemistry, Geophysics, Geosystems, 2020
Field studies have led to several interpretations on the mechanics behind slow earthquake phenomena downdip of the seismogenic zone. To date, field studies have not examined the shallow subduction interface which may also host slow earthquake phenomena ...
Noah John Phillips, Ginta Motohashi, Kohtaro Ujiie, Christie D. Rowe   +3 more
doaj   +1 more source

Foreshock properties illuminate nucleation processes of slow and fast laboratory earthquakes

Nature Communications, 2023
Understanding the connection between seismic activity and the earthquake nucleation process is a fundamental goal in earthquake seismology with important implications for earthquake early warning systems and forecasting.
David C. Bolton, Chris Marone, Demian Saffer, Daniel T. Trugman   +3 more
doaj   +1 more source

Characteristics of Slow Slip Event in March 2020 Revealed From Borehole and DONET Observatories

Frontiers in Earth Science, 2021
We have detected an event of pore pressure change (hereafter, we refer it to “pore pressure event”) from borehole stations in real time in March 2020, owing to the network developed by connecting three borehole stations to the Dense Oceanfloor Network ...
Keisuke Ariyoshi, Takeshi Iinuma, Masaru Nakano, Toshinori Kimura, Eiichiro Araki, Yuya Machida, Kentaro Sueki, Shuichiro Yada, Takehiro Nishiyama, Kensuke Suzuki, Takane Hori, Narumi Takahashi, Narumi Takahashi, Shuichi Kodaira   +13 more
doaj   +1 more source

Observation of Shallow Slow Earthquakes by Distributed Acoustic Sensing Using Offshore Fiber‐Optic Cable in the Nankai Trough, Southwest Japan

Geophysical Research Letters, 2023
Off Cape Muroto area, along the Nankai Trough in southwest Japan, is a typical area with adjacent occurrences of slow and megathrust earthquakes. High‐resolution monitoring of slow earthquakes is necessary to understand tectonic conditions.
Satoru Baba, Eiichiro Araki, Yojiro Yamamoto, Takane Hori, Gou Fujie, Yasuyuki Nakamura, Takashi Yokobiki, Hiroyuki Matsumoto   +7 more
doaj   +1 more source

Strongly Scattering Medium Along Slow Earthquake Fault Zones Based on New Observations of Short‐Duration Tremors

Geophysical Research Letters, 2023
Tremors are a type of slow earthquake with long‐duration signals compared to ordinary earthquakes. The long signals have been considered to solely reflect their long source process.
A. Toh, Y. Capdeville, W.‐C. Chi, S. Ide   +3 more
doaj   +1 more source

Creep fronts and complexity in laboratory earthquake sequences illuminate delayed earthquake triggering

Nature Communications, 2022
Laboratory earthquake experiments reproduce delayed earthquake triggering, similar to aftershocks, as a result of propagating slow slip fronts. The speed of the fronts can be highly sensitive to fault stress levels left behind by previous earthquakes.
Sara Beth L. Cebry, Chun-Yu Ke, Srisharan Shreedharan, Chris Marone, David S. Kammer, Gregory C. McLaskey   +5 more
doaj   +1 more source

Distribution of low-frequency earthquakes accompanying the very low frequency earthquakes along the Ryukyu Trench

Earth, Planets and Space, 2017
This study investigated the activity and distribution of low-frequency earthquakes (LFEs) accompanying the very low frequency earthquakes (VLFEs) in the central and southern Ryukyu Trench.
Mamoru Nakamura
doaj   +1 more source