Variability of repeating earthquake behavior along the Longitudinal Valley fault zone of eastern Taiwan

Hui-Hsuan Chen, Ruey Juin Rau, Jyr Ching Hu

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

[1] Two major clusters of repeating earthquake sequences (RES) are found on two fault patches near the Longitudinal Valley fault (LVF) in eastern Taiwan, the Chihshang segment to the south and the Hualien segment to the north. The 25 M 2.3-4.6 RES on the Hualien segment are widely distributed in a NNE direction over a distance of 45 km, whereas on the Chihshang segment, the 30 M 2.2-3.4 RES have a shorter along-strike extent of about 15 km. The longer spatial extent of RES on the Hualien segment may indicate a wider distributed creeping zone at depth. M ≥ 3.8 RES are observed on the Hualien segment and are characterized by quasiperiodic recurrence. Statistical analysis of the size and number of earthquakes adjacent to the RES indicates that the smaller number of large earthquakes in the vicinity may explain the quasiperiodic recurrence of RES. We argue that on the Hualien segment, M∼4 or larger earthquakes are isolated enough in space to facilitate the occurrence of repeated ruptures.

Original languageEnglish
JournalJournal of Geophysical Research: Solid Earth
Volume114
Issue number5
DOIs
Publication statusPublished - 2009 Jan 1

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Taiwan
valleys
fault zone
Earthquakes
earthquakes
valley
earthquake
statistical analysis
rupture
Statistical methods
occurrences

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Cite this

Variability of repeating earthquake behavior along the Longitudinal Valley fault zone of eastern Taiwan. / Chen, Hui-Hsuan; Rau, Ruey Juin; Hu, Jyr Ching.

In: Journal of Geophysical Research: Solid Earth, Vol. 114, No. 5, 01.01.2009.

Research output: Contribution to journalArticle

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