Interaction between two subducting plates under Tokyo and its possible effects on seismic hazards

Francis Wu, David Okaya, Hiroshi Sato, Naoshi Hirata

doi:10.1029/2007gl030763

Interaction between two subducting plates under Tokyo and its possible effects on seismic hazards

DOI Web Site Web Site 被引用文献15件オープンアクセス

Francis Wu

Department of Geological Sciences Binghamton University Binghamton New York USA
David Okaya

Department of Earth Sciences University of Southern California Los Angeles California USA
Hiroshi Sato

Earthquake Research Institute University of Tokyo Tokyo Japan
Naoshi Hirata

Earthquake Research Institute University of Tokyo Tokyo Japan

書誌事項

公開日: 2007-09

権利情報

http://onlinelibrary.wiley.com/termsAndConditions#vor

DOI

10.1029/2007gl030763

公開者: American Geophysical Union (AGU)

この論文をさがす

CiNii Books

説明

<jats:p>Underneath metropolitan Tokyo the Philippine Sea plate (PHS) subducts to the north on top of the westward subducting Pacific plate (PAC). New, relatively high‐resolution tomography images the PHS as a well‐defined subduction zone under western Kanto Plain. As PAC shoals under eastern Kanto, the PHS lithosphere is being thrusted into an increasingly tighter space of the PAC‐Eurasian mantle wedge. As a result, zones of enhanced seismicity appear under eastern Kanto at the top of PHS, internal to PHS and also at its contact with PAC. These zones are located at depths greater than the causative fault of the disastrous 1923 Great Tokyo “megathrust” earthquake, in the vicinity of several well‐located historical, damaging (M6 and M7) earthquakes. Thus a rather unique interaction between subducting plates under Tokyo may account for additional seismic hazards in metropolitan Tokyo.</jats:p>