Paleoseismic Study of the Chelungpu Fault in the Wanfung Area
نویسنده
چکیده
The excavation in the Wanfung area has provided evidence for at least three earthquake ruptures, including the 1999 ChiChi one. The Chi-Chi earthquake formed an obviously major reverse fault, backthrust, and several minor normal faults, accompanied by a teardrop-shape anticline in the fault tip. Paleoseismic ruptures I and II show the vertical displacement of 0.4 m and 1.2 m, respectively, which is similar in magnitude to the offset by the Chi-Chi earthquake in this area. Based on the stratigraphical and structural relations, and 14C dating, rupture II may not have occurred before 300 yr B.P. From the historical record, it may be suggested that the paleoseismic rupture II may have been caused by either the 1792 A.D. or 1848 A.D. strong earthquake in central Taiwan.
منابع مشابه
In situ measurement of the hydraulic diffusivity of the active Chelungpu Fault, Taiwan
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