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Low-frequency earthquakes in Shikoku, Japan, and their relationship to episodic tremor and slip

Author

Listed:
  • David R. Shelly

    (Stanford University)

  • Gregory C. Beroza

    (Stanford University)

  • Satoshi Ide

    (University of Tokyo, Hongo 7-3-1, Bunkyo-ku)

  • Sho Nakamula

    (University of Tokyo)

Abstract

Tremor on a plate Non-volcanic seismic tremor, seismic activity resembling that created by magma moving under volcanoes, but taking place well away from any volcanic activity, was first observed six years ago in the Nankai trough subduction zone in southwest Japan and subsequently in the Cascadia subduction zone and beneath the San Andreas fault. The mechanisms causing this 'new' form of seismic activity are still unclear. Seismic monitoring data from southwest Japan have now been used to locate lowfrequency events associated with nonvolcanic tremor. These earthquakes occur at the plate interface, which suggests that they and the associated tremor are generated by fluidenabled shear slip on the plate interface, rather than directly by fluid flow.

Suggested Citation

  • David R. Shelly & Gregory C. Beroza & Satoshi Ide & Sho Nakamula, 2006. "Low-frequency earthquakes in Shikoku, Japan, and their relationship to episodic tremor and slip," Nature, Nature, vol. 442(7099), pages 188-191, July.
    • Handle: RePEc:nat:nature:v:442:y:2006:i:7099:d:10.1038_nature04931
    DOI: 10.1038/nature04931
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    Cited by:

    1. Wei Feng & Lu Yao & Chiara Cornelio & Rodrigo Gomila & Shengli Ma & Chaoqun Yang & Luigi Germinario & Claudio Mazzoli & Giulio Di Toro, 2023. "Physical state of water controls friction of gabbro-built faults," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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