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  • Letter
  • Open Access

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

  • 116Email author,
  • 116,
  • 116,
  • 116,
  • 116,
  • 216,
  • 216,
  • 316,
  • 316,
  • 316 and
  • 316
Earth, Planets and Space200758:BF03352670

https://doi.org/10.1186/BF03352670

  • Received: 15 October 2005
  • Accepted: 13 June 2006
  • Published:

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.

Key words

  • Stress drop
  • aftershock
  • site effect
  • intraplate earthquake
  • anelastic attenuation
  • stress

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