Seismicity characteristics before the 2003 Chengkung, Taiwan, earthquake

Yih Min Wu, Chien Chih Chen, Li Zhao, Chien Hsin Chang

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

We investigate the variations in seismicity pattern in the Taiwan region before the 2003 Chengkung, Taiwan, earthquake (Mw = 6.8) by calculating the standard normal deviate of the Z-values and b-values from the Gutenberg-Richter relation. The Mogi donut-shaped variations in the seismicity can be identified in the Z-value map surrounding the Chengkung earthquake source region. Noticeable decreases in the b-values have also been found around the mainshock region before the Chengkung event. The relatively low-seismicity rate and the decrease in the b-values may be the precursory phenomena associated with the quiescence in overall seismicity and the activation of moderate-sized events occurred around the mainshock region before the Chengkung event.

Original languageEnglish
Pages (from-to)177-182
Number of pages6
JournalTectonophysics
Volume457
Issue number3-4
DOIs
StatePublished - 1 Oct 2008

Keywords

  • Earthquake
  • Earthquake precursors
  • Seismic quiescence
  • Seismicity
  • b-values

Fingerprint

Dive into the research topics of 'Seismicity characteristics before the 2003 Chengkung, Taiwan, earthquake'. Together they form a unique fingerprint.

Cite this