摘要
Using the methods of the Gutenberg magnitude energy empirical formula and the Benioff seismic strain energy release curve,we make a systematic study on seismic strain energy release of historical earthquakes in the southeastern margin of the Qinghai-Tibetan Plateau since 1500.This paper provides a periodic table of the earthquake strain energy release in the fault zones and the fault block areas.The study shows that seismic strain energy release is strong in the east and south,and weak in the west and north.The overall seismic strain energy release of the Yushu-Xianshuihe-Xiaojiang fault system is consistent with the quasi-periodic pattern.The seismic cycle of some fault zones and fault block areas shows synchronization to a certain extent.The risk cannot be ignored in the current large release period of seismic strain energy in the southeastern margin of the Qinghai-Tibetan plateau.Local seismic risk analysis shows that seismic risk is very high on the Anninghe-Zemuhe and Xiaojiang fault zones.These dangerous zones need follow-up research.In future,it is necessary to combine different research methods to improve the reliability of seismic risk assessment.
Using the methods of the Gutenberg magnitude energy empirical formula and the Benioff seismic strain energy release curve, we make a systematic study on seismic strain energy release of historical earthquakes in the southeastern margin of the Qinghai-Tibetan Plateau since 1500. This paper provides a periodic table of the earthquake strain energy release in the fault zones and the fault block areas. The study shows that seismic strain energy release is strong in the east and south, and weak in the west and north. The overall seismic strain energy release of the Yushu-Xianshuihe-Xiaojiang fault system is consistent with the quasi-periodic pattern. The seismic cycle of some fault zones and fault block areas shows synchronization to a certain extent. The risk cannot be ignored in the current large release period of seismic strain energy in the southeastern margin of the Qinghai-Tibetan plateau. Local seismic risk analysis shows that seismic risk is very high on the Anninghe-Zemuhe and Xiaojiang fault zones. These dangerous zones need follow-up research. In future, it is necessary to combine different research methods to improve the reliability of seismic risk assessment.
基金
funded jointly by the China Geological Survey (Project Grant No. 1212011120163, 12120114002101)
the National Natural Science Foundation of China (Project Grant No: 41171009)
the basal research fund of Institute of Geomechanics,Chinese Academy of Geological Sciences (DXLXJK201410)
