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A rupture blank zone in middle south part of Longmenshan Faults: Effect after Lushan M s7.0 earthquake of 20 April 2013 in Sichuan,China |
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| Authors: | Yuan Gao Qiong Wang Bo Zhao YuTao Shi |
| Affiliation: | 1. Institute of Earthquake Science, China Earthquake Administration, Beijing, 100036, China 3. Institute of Geophysics, China Earthquake Administration, Beijing, 100081, China 2. China Earthquake Networks Center, China Earthquake Administration, Beijing, 100045, China |
| Abstract: | On April 20, 2013, the Lushan Ms7.0 earthquake struck at the southern part of the Longmenshan fault in the eastern Tibetan Plateau, China. The shear-wave splitting in the crust indicates a connection between the direction of the principal crustal compressive stress and the fault orientation in the Longmenshan fault zone. Our relocation analysis of the aftershocks of the Lushan earthquake shows a gap between the location of the rupture zone of the Lushan Ms7.0 earthquake and that of the rupture zone of the Wenchuan Ms8.0 earthquake. We believe that stress levels in the crust at the rupture gap and its vicinity should be monitored in the immediate future. We suggest using controlled source borehole measurements for this purpose. |
| Keywords: | Lushan earthquake Longmenshan Fault rupture gap crustal seismic anisotropy double difference relocation borehole measurements of stress change |
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