Invited by State Key Laboratory of Geodesy and Earth’s Dynamics (SKLGED), Dr. Wei Shengji from Nanyang Technological University(NTU) visited Institute of Geodesy and Geophysics(IGG) and gave two academic reports on title "Multiple point source inversion and its application to the 2016 Kumamoto Mw6.2 foreshock"and “Refine fault geometry with broadband waveform modeling, application to 2015 Nepal Earthquake Sequence and the Sumatran Subduction zone” on July 20.
Dr. Wei firstly introduced the Monte Carlo search method to research the multi-point source space location, earthquake time, focal mechanism solution, magnitude and source time function of the 2016 Kumamoto earthquake. It is found that the earthquake occurred on a complex fault, showing the characteristics of two-way rupture. The report showed that the horizontal position and depth of the early aftershocks of the main shock are constrained by the manually calibrated telecentric P-wave and the epicentral depth facies. We can amplify the amplitude amplifying factor (AAF) to obtain the early aftershocks of the focal mechanism solution. Then we can constrain the 2015 Nepal earthquake and Sumatran subduction zone fault geometry by the aftershocks of the spatial distribution and mechanism of the solution. It is found that the geometrical form of the fault is an important factor influencing and restraining the main earthquake rupture range by comparing the fault geometry and the main fault rupture range. Dr. Wei also showed the results of the subduction zone geometry, rich and informative. After the report, the participants on the related research have a deep discussion with Dr. Wei and achieved good communication results.
Dr. Wei is mainly engaged in real-time seismology, source mechanism inversion, finite fault source kinematic inversion, strong ground motion simulation. He is an assistant professor of the Asian Environment Institute of Nanyang Technological University in Singapore now.
Dr. Wei was giving the report.
