Tectonic Implications of 1998, Ruey-Li, Taiwan, Earthquake Sequence

1988臺灣瑞里地震序列之構造意義

陳朝輝(Chau-Huei Chen) ； 王維豪(Wei-Hau Wang) ； 鄧大量(Ta-Liang Teng)

《Terrestrial, Atmospheric and Oceanic Sciences》 14卷1期 (2003/03) Pp. 27-40

並列摘要

We carried out a seismotectonic study on the 1998 Ruey-Li, Taiwan earthquake. This ML = 6.2 event occurred in a close neighborhood to and about one year before the Mw = 7.6 disastrous Chi-Chi, Taiwan earthquake of 1999. Both the Ruey-Li and the Chi-Chi events share a common regional stress system. From the relocated hypocenters, focal mechanisms and stress inversion of the Ruey-Li sequence, we find that the spatial distribution of aftershocks forms two distinct groups, one is consistent with a planar thrust, the other gives a peculiar 3 km x 5 km x 15 km of nearly vertical columnar distribution made principally of left-lateral strike-slip faulting. A regional block rotation model is proposed to explain the rupture process; this model is supported by the well-documented GPS data.

並列關鍵字

Tectonic stress ； Double differential travel time