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| 論文名稱 | The role of a hidden fault in stress triggering: Stress interactions within the 1935 Mw7.1 Hsinchu–Taichung earthquake sequence in central Taiwan |
| 發表日期 | 2013-08-02 |
| 論文收錄分類 | SCI |
| 所有作者 | Den-Hor Lin、Kate Huihsuan Chen、Ruey-Juin Rau、Jyr-Ching Hu |
| 作者順序 | 第一作者 |
| 通訊作者 | 否 |
| 刊物名稱 | Tectonophysics |
| 發表卷數 | |
| 是否具有審稿制度 | 是 |
| 發表期數 | 601 |
| 期刊或學報出版地國別/地區 | NATUSA-美國 |
| 發表年份 | 2013 |
| 發表月份 | 8 |
| 發表形式 | 紙本及電子期刊 |
| 所屬計劃案 | 無 |
| 可公開文檔 |
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| 可公開文檔 |
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| 可公開文檔 |
[英文摘要] :
Hidden faults often lead to misestimation of earthquake hazard. In western Taiwan where many blind faults are located, how the stress interactions correlate with potentially significant earthquakes and what is the role of blind faults in earthquake triggering are the important questions for earthquake hazard assessment. Given sequential rupture of active faults with an unexposed fault segment involved, the 1935 Mw 7.1 Hsinchu–Taichung earthquake sequence in central Taiwan provides an exceptional case to study. This destructive earthquake sequence took ~3000 lives and was composed of four M > 6 earthquakes occurred within three months. The Mw7.1mainshock and a subsequent Mw6.8 event that occurred 12 s later caused surface ruptures on the Tuntzuchiao fault (TTCF) and Shihtan fault (STF)which are separated by 25 km. These two ruptureswere characterized by different types of faulting: thrust-faulting on the STF and right-lateral faulting on the TTCF fault.
About 24 min later, anMw6.0 event occurred ~45 kmnorth of themainshock. Three months later on July 17, the last event,Mw6.2, occurred 30 km northwest of the mainshock. In this studywe revisit the data available for the 1935 sequence in an effort to place constraints on the fault models. Using five different fault models, a series of Coulomb stress calculations are conducted to understand whether static stress transfer advances slip during the subsequent events. We propose that key features of the 1935 Hsinchu–Taichung earthquake triggering can be explained by the existence of an unexposed fault segment in between the segments of TTCF and STF. We also show that the 1935 earthquake sequencemay play an important role in activating post-1935 earthquake activity along the Sanyi–Puli seismic zone, where the sequential ruptures of the 1935 events encourage ruptures of a NW–SE-trending seismic zone at later times.
