TY - JOUR
T1 - A trial derivation of seismic plate coupling by focusing on the activity of shallow slow earthquakes
AU - Ariyoshi, Keisuke
AU - Matsuzawa, Toru
AU - Hino, Ryota
AU - Hasegawa, Akira
AU - Hori, Takane
AU - Nakata, Ryoko
AU - Kaneda, Yoshiyuki
N1 - Funding Information:
The authors thank the DONET project members for fruitful discussions. The present study used the Earth Simulator and the supercomputing resources at the Cyberscience Center of Tohoku University. GMT software (Wessel and Smith 1998) was used to draw a number of the figures. The comments of two anonymous reviewers helped improve our manuscript. We are obliged to the editor Junichi Nakajima for expeditious handling. This study was partly supported by the MEXT for Geofluids program and the JSPS for Young Scientists (B), 23710212, and for Specially Promoted Research, 26000002. We thank Midori Hasegawa for the final proofreading.
PY - 2014/12
Y1 - 2014/12
N2 - To understand the effect of plate coupling on very low-frequency event (VLFE) activity resulting from megathrust earthquakes, we performed long-Term multiscale earthquake cycle simulations (including a megathrust earthquake and slow earthquakes) on a 3-D subduction plate boundary model, based on a rate- And state-dependent friction law. Our simulation suggests that quiescence of shallow VLFEs off Miyagi may be explained by the location in the shallow central part of the 2011 Tohoku earthquake because of the locally strong coupling, while observed activation of VLFEs off Iwate (northern part of Tohoku district), Fukushima (southern part of Tohoku district), and Ibaraki (northern part of Kanto district) is explained by the location on the outer rim. The area and duration of the quiescence off Miyagi may be a new clue to evaluate the potential for plate coupling strong enough to cause the next megathrust earthquake.
AB - To understand the effect of plate coupling on very low-frequency event (VLFE) activity resulting from megathrust earthquakes, we performed long-Term multiscale earthquake cycle simulations (including a megathrust earthquake and slow earthquakes) on a 3-D subduction plate boundary model, based on a rate- And state-dependent friction law. Our simulation suggests that quiescence of shallow VLFEs off Miyagi may be explained by the location in the shallow central part of the 2011 Tohoku earthquake because of the locally strong coupling, while observed activation of VLFEs off Iwate (northern part of Tohoku district), Fukushima (southern part of Tohoku district), and Ibaraki (northern part of Kanto district) is explained by the location on the outer rim. The area and duration of the quiescence off Miyagi may be a new clue to evaluate the potential for plate coupling strong enough to cause the next megathrust earthquake.
KW - Megathrust earthquake
KW - Rate- And state-dependent friction law
KW - Subduction plate boundary
KW - Superhydrostatic pressure
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U2 - 10.1186/1880-5981-66-55
DO - 10.1186/1880-5981-66-55
M3 - Article
AN - SCOPUS:84903764194
SN - 1343-8832
VL - 66
JO - Earth, Planets and Space
JF - Earth, Planets and Space
IS - 1
M1 - 55
ER -