期刊
EARTH PLANETS AND SPACE
卷 63, 期 7, 页码 731-735出版社
SPRINGER
DOI: 10.5047/eps.2011.06.001
关键词
2011 off the Pacific coast of Tohoku Earthquake; static change in the Coulomb Failure Function (Delta CFF); Tokyo metropolitan area; seismicity
资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan
Static changes in the Coulomb Failure Function (Delta CFF) forecast an increase in seismicity in and around the Tokyo metropolis after the 2011 off the Pacific coast of Tohoku Earthquake (magnitude 9.0). Among the 30,694 previous events in this region with various depth and focal mechanism, almost 19,000 indicate a significant increase of the Delta CFF, while less than 6,000 indicate a significant decrease. An increase in seismicity is predicted in southwestern Ibaraki and northern Chiba prefectures where intermediate-depth earthquakes occur, and in the shallow crust of the Izu and Hakone regions. A comparison of seismicity before and after the 2011 event reveals that the seismicity in the above regions indeed increased as predicted from the Delta CFF.
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