Estimate the activity by using the 3D fault model of Central Range Fault, eastern Taiwan
Abstract
Taiwan is located in the subduction zone between Eurasia plate and Philippine Sea Plate, which are converged at the rate of 7-8 cm per year. This high plate convergence speed caused rapid uplift of the central mountain range, and produce lots of complex fold & thrust structures. On Feb. 6, 2018, there was an Mw 6.4 earthquake occur in Hualien offshore. And the epicenter is extended south to the Milun fault then connected to the northern Longitudinal fault. According to the focal mechanism from Central Weather Bureau (CWB) and U.S. Geological Survey (USGS). The 0206 event might be a strike-slip fault with reverse component and fault plane might be dipping to the west. However, there is another M6.1 event occurred in a nearby inland location which is 10km west from Milun fault at Apr. 18, 2019. According to the focal mechanism analysis, the 0418 event is thrust system and the fault plane might be dipping to the west, too. From these two earthquake events, we can determine there should be a west dipping blind fault which is called Central Range Fault (CRF). From tomography and seismic data, we can visualize the underground geometry into 3D model. And calculated the reactive probability of CRF and how much is the maximum magnitude could be induced.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.T51C..18L
- Keywords:
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- 0545 Modeling;
- COMPUTATIONAL GEOPHYSICS;
- 0560 Numerical solutions;
- COMPUTATIONAL GEOPHYSICS;
- 1932 High-performance computing;
- INFORMATICS;
- 3275 Uncertainty quantification;
- MATHEMATICAL GEOPHYSICS