Seafloor displacement at Kumano-nada caused by the 2004 off Kii Peninsula earthquakes, detected through repeated GPS/Acoustic surveys

Motoyuki Kido, Hiromi Fujimoto, Satoshi Miura, Yukihito Osada, Kentaro Tsuka, Takao Tabei

Research output: Contribution to journalArticlepeer-review

63 Citations (Scopus)

Abstract

In 2004, we started monitoring crustal deformation at Kumano-nada in the Nankai trough using the GPS/Acoustic technique. We observed a large southward seafloor displacement of~30 cm associated with the off Kii Peninsula earthquake, which occurred in September 2004, between our two survey campaigns in August and November 2004. The observed seafloor displacement is larger than that predicted from a slip model derived solely from GPS measurements on land. This may indicate the earthquake fault is slightly shallower and extends move to the NW than previously estimated.

Original languageEnglish
Pages (from-to)911-915
Number of pages5
Journalearth, planets and space
Volume58
Issue number7
DOIs
Publication statusPublished - 2006

Keywords

  • 2004 off Kii Peninsula earthquake
  • GPS/Acoustic measurement
  • Kumano-nada
  • seafloor displacement

ASJC Scopus subject areas

  • Geology
  • Space and Planetary Science

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