Precursory seismic activation of the Pingtung (Taiwan) offshore doublet earthquakes on 26 December 2006: A pattern informatics analysis

Yi Hsuan Wu, Chien Chih Chen, John B. Rundle

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

We report the retrospective analyses of frequency-magnitude distributions (FMD) and pattern informatics (PI) for the Pingtung offshore doublet earthquakes having magnitudes 6.7 and 6.4. The frequency-magnitude distributions of earthquakes that occurred in the study area preceding the Pingtung doublets demonstrate the activation of moderate events since March 2004, about three years before the Pingtung doublets. In addition, in the calculated PI map, the hypocentral area of the doublets exhibits the signatures of anomalous activity associated with the precursory seismic activation. Our study therefore suggests that, by inspecting temporal variations in the frequency-magnitude distributions of earthquakes, together with the hotspot locations with intense seismicity changes in the PI map, it is possible to shed light on the relevant preparation processes of the forthcoming large earthquakes.

Original languageEnglish
Pages (from-to)743-749
Number of pages7
JournalTerrestrial, Atmospheric and Oceanic Sciences
Volume19
Issue number6
DOIs
StatePublished - Dec 2008

Keywords

  • Pattern informatics
  • Pingtung offshore doublet earthquakes
  • Precursory phenomena
  • Seismicity changes

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