دورية أكاديمية
Basin inversion in central Taiwan and its importance for seismic hazard
| العنوان: | Basin inversion in central Taiwan and its importance for seismic hazard |
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| المؤلفون: | Camanni, Giovanni, Chen, C. H., Brown, Dennis, Alvarez-Marrón, Joaquina, Wu, Y. M., Chen, H. A., Huang, H. H., Chu, H. T., Chen, M. M., Chang, C. H. |
| بيانات النشر: | American Geophysical Union |
| سنة النشر: | 2014 |
| المجموعة: | Digital.CSIC (Consejo Superior de Investigaciones Científicas / Spanish National Research Council) |
| مصطلحات موضوعية: | Acoustic wave velocity, Earthquakes, Seismic design, Seismic waves, Wave propagation, Basin inversions, Bounding faults, Detachment fault, Extensional faults, Local tomography, Seismic hazards, Structural modeling, Threedimensional (3-d), Faulting |
| الوصف: | On 27 March 2013, a 6.2 ML earthquake occurred at 19 km depth in eastern Nantou, central Taiwan. Over a 2 week period it was followed by more than 680 aftershocks that ranged to 5 ML. Most events occurred below the ~10-km-deep detachment fault predicted for this part of the mountain belt, coinciding with other precisely located hypocenters that indicate that much of the crust in this area is seismically active. We combine geological data with a three-dimensional (3-D) P-wave velocity model derived from local tomography and earthquake hypocenters to determine a model for the structure of central Taiwan. Much of the surface geology of the area comprises the uplifted Eocene rocks of the Hsuehshan Basin. The 3-D P-wave velocity model shows a shallowing of higher velocities across the Hsuehshan Basin and hypocenter data indicate that its western bounding fault is clearly defined by an eastward-dipping band of events that extends to >20 km depth. The eastern bounding fault is interpreted to coincide at depth with a cluster of events between 20 and 30 km depth. These data suggest that the preexisting, rift-related extensional faults of the Hsuehshan Basin are currently being reactivated and the basin is being inverted. We present hypocenter data from the Nantou sequence that corroborate this interpretation and show the importance of choosing the correct structural model when assessing seismic risk. © 2013 Geological Society of America. ; Proyectos Intramurales 2006 301010, Ministerio de Ciencia e Innovación CGL2009-11843-BTE, and the CSIC predoctoral program Junta para la Ampliación de Estudios (JAE-Predoc). ; Peer reviewed |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1943-2682 |
| العلاقة: | http://dx.doi.org/10.1130/G35102.1Test; Sí; Geology 42(2): 147-150 (2014); http://hdl.handle.net/10261/99226Test |
| DOI: | 10.1130/G35102.1 |
| الإتاحة: | https://doi.org/10.1130/G35102.1Test http://hdl.handle.net/10261/99226Test |
| حقوق: | none |
| رقم الانضمام: | edsbas.9EB6B53 |
| قاعدة البيانات: | BASE |
| تدمد: | 19432682 |
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| DOI: | 10.1130/G35102.1 |