SIMULATION OF GROUND MOTION BASED ON CHARACTERISTIC EARTHQUAKES IN XIANSHUIHE FAULT ZONE

Xianshuihe fault zone is a strong left-lateral strike-slip fault, with large strength and high frequency activity, exposes millions of people to potential risk from strong motion and earthquake-induced secondary geological disasters in southwest China. The seismicity on this faults zone has the typical features of characteristic earthquakes and obvious active faults segmentation. In this work base on characteristic earthquake model in each active fault segmentation, seismic time history and peak value of strong ground motions on near field observation points is predicted by stochastic finite-fault source model. Parameters of source model composed by magnitude of characteristic earthquake, geometric dimensioning of characteristic rupture plane, the stress drop and so on. Finally, the prediction map of ground motion made by characteristic earthquake near the whole fault zone is obtained. Research technology and methods have important implications for China's earthquake disaster reduction work, and benefit innovation and development of China's seismic zoning.