Spatial distribution of static stress drops for aftershocks of the 2005 West Off Fukuoka Prefecture earthquake

Yoshihisa Iio, Hiroshi Katao, Tomotake Ueno, Bogdan Enescu, Norio Hirano, Tomomi Okada, Naoki Uchida, Satoshi Matsumoto, Takeshi Matsushima, Kenji Uehira, Hiroshi Shimizu

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Abstract

We investigated the spatial distribution of static stress drops of the aftershocks of the 2005 West Off Fukuoka Prefecture earthquake, with the aim of assessing the possibility that another earthquake will occur on the SE extension of the earthquake fault. The waveforms from six temporary online telemetry stations installed in and around the aftershock region were measured. Small stress drops were estimated for the aftershocks that occurred relatively distant from the SE and NE ends of the earthquake fault. Conversely, the aftershocks that occurred around the SE end of aftershock region are characterized by large stress drops. These results imply the possibility of a stress concentration at the SE edge of the main shock fault.

Original languageEnglish
Pages (from-to)1611-1615
Number of pages5
Journalearth, planets and space
Volume58
Issue number12
DOIs
Publication statusPublished - Jan 1 2006

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All Science Journal Classification (ASJC) codes

  • Geology
  • Space and Planetary Science

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