Slip distribution of 2003 Tokachi-Oki (Japan) Earthquake derived from coseismic GPS observation

Faqi Diao*, Xiong Xiong, Jun Li, Yong Zheng

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

With the observed GPS coseismic displacements of Tokachi-Oki Earthquake and its biggest aftershock, we derive the coseismic slip distributions of the two earthquakes using SBIF (sensitivity-based iterative fitting) method. A more real fault geometry and layered Earth model were considered in the inverted process. As results shown, the maximal slips of the main shock and the biggest aftershock are 3.07 m and 0.33 m respectively. The corresponding moment magnitude scale are Mw 7.94 and Mw 7.1, which is consistent with the seismic result. In addition, the slip of the aftershock is mainly located at the place the coseismic slip of the main shock is lower, which perhaps indicate that the stress of surrounding region is enlarged by the coseismic slip of the main shock and thus trigger the biggest aftershock.

Original languageEnglish
Pages (from-to)270-273
Number of pages4
JournalWuhan Daxue Xuebao (Xinxi Kexue Ban)/ Geomatics and Information Science of Wuhan University
Volume35
Issue number3
Publication statusPublished - Mar 2010
Externally publishedYes

Keywords

  • Coseismic deformation
  • GPS
  • Slip distribution
  • Tokachi-Oki Earthquake

Fingerprint Dive into the research topics of 'Slip distribution of 2003 Tokachi-Oki (Japan) Earthquake derived from coseismic GPS observation'. Together they form a unique fingerprint.

  • Cite this