Preliminary result for rupture process of Apr. 20, 2013, Lushan Earthquake, Sichuan, China

The rupture process of the 20, Apr. 2013, Lushan earthquake was fast estimated by finite fault model method using far field body waveform records. The predicted shakemap is subsequently calculated based on rupture fault model of this earthquake. Results show that the earthquake is an M(w)6.7 thrusting event which occurred on the south part of Longmen Shan fault zone with 159 cm largest slip. By the predicted shakemap, the intensity of epicenter region should reached VIII-IX on Chinese seismic intensity scale. The thrusting mechanism of Lushan earthquake is similar to that of Wenchuan earthquake. The earthquake rupture of this event occurred on the southern section of Longmen Shan fault where shows increase of Coulomb stress caused by the Wenchuan earthquake. This event may be triggered by the Wenchuan earthquake. On the view of macroscopic, this earthquake can be considered as an delayed strong aftershock of Wenchuan earthquake.