Plate tearing in the northwestern corner of the subducting philippine sea plate

Jing Yi Lin, Shu Kun Hsu, Jean Claude Sibuet, Chao Shing Lee, Chin Wei Liang

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The Philippine Sea Plate (PHS) simultaneously subducts northwestward and collides eastward with the Eurasian Plate (EU) in northeast Taiwan. These two tectonic events induce high seismic activity, which makes northeastern Taiwan one of the most seismically active zones in the world. To understand the mechanical processes at work, we used existing geophysical data and the aftershocks recorded following a recent large strike-slip event occurring within the PHS oceanic crust. During this event, a NW-SE trending left-lateral sub-parallel to the PHS/EU convergence vector was active. As a consequence of the collision/ subduction plate geometry, we show that the lithosphere of the northwestern corner of the PHS has been torn in a NW-SE orientation. This tectonic feature is associated with an abrupt tectonic stress boundary and could generate large intra-plate earthquakes.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalJournal of Asian Earth Sciences
Volume70-71
DOIs
StatePublished - 2013

Keywords

  • Left lateral strike-slip fault
  • Philippine sea plate
  • Ryukyu subduction zone
  • Seismicity

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