Journal
GONDWANA RESEARCH
Volume 16, Issue 3-4, Pages 534-544Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.gr.2009.03.006
Keywords
Non-volcanic deep low-frequency tremors; Slow slip events; Rupture propagation process; Chain reaction; Rate and state dependent friction law
Categories
Funding
- Cyberscience Center of Tbhoku University
- DONET Ministry of Education, Culture, Sports, Science and Technology. GMT
Ask authors/readers for more resources
Recently, the occurrence of slow earthquakes such as low-frequency earthquakes and very low-frequency earthquakes have been recognized at depths of about 30 km in southwest Japan and Cascadia. These slow earthquakes occur sometimes in isolation and sometimes break into chain-reaction, producing tremor that migrates at a speed of about 5-15 km/day and suggesting a strong interaction among nearby small asperities. In this study, we formulate a 3-D subduction plate boundary model with two types of small asperities chained along the trench at the depth of 30 km. Our simulation succeeds in representing various types of slow earthquakes including low-frequency earthquakes and rapid slip velocity in the same asperity, and indicates that interaction between asperities may cause the very low-frequency earthquakes. Our simulation also shows chain reaction along trench with propagation speed that can be made consistent with observations by adjusting model parameters, which suggests that the interactions also explain the observed migration of slow earthquakes. (C) 2009 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available