Earthquake probabilities and energy characteristics of seismicity offshore southwest Taiwan

Po Fei Chen, Andrew V. Newman, Tso Ren Wu, Ching Ching Lin

研究成果: 雜誌貢獻期刊論文同行評審

7 引文 斯高帕斯(Scopus)


We characterize fault geometries for moderate and large earthquakes in and offshore southwest (SW) Taiwan. Stress orientation estimates suggest that the first shock of the Pingtung earthquake may be characterized by slab flexure. A region of predominately normal-faulting earthquakes is also defined. Using the maximum-likelihood Gutenberg-Richter relation, we find that the repeat times for magnitude, M ≧ 6.5 and M ≧ 7.0 earthquakes are approximately 30 and 80 years, respectively. By assuming a Gaussian probability distribution with a standard deviation of 0.4 the recurrence time, we estimate a 50% probability of an M ≧ 6.5 earthquake recurring in the next 3 0 years, while only a 20% probability of an M ≧ 7.0 in the next 50 years. To test the empirical relation that is currently being used to convert ML to seismic moment (M0), we test the well-defined energy to moment ratio (E/M0) for the region. We additionally utilize this method to identify the lack of slow-source earthquakes in several recent offshore events in Taiwan.

頁(從 - 到)697-703
期刊Terrestrial, Atmospheric and Oceanic Sciences
出版狀態已出版 - 12月 2008


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