Statistical Analysis of Tectonic Environment for Strong Earthquakes in China's Continent

摘要

A statistical analysis of tectonic environment for M ≥ 6.0 strong earthquakes in China' s continent since the beginning of recorded history is performed based on the data of active faults studied during last 10 years and result of compilation of the fourth version of the Map of Seismic Regionalization of China for Earthquake Protection. Tectonic types of seismic sources of strong earthquakes in all seismic regions and the movement modes of seismogenic structures are discussed. Meanwhile, an analysis of lengths of surface rupture zones produced by all types of earthquakes, orientations of long axes of meizoseismal areas, regional tectonic stress fields in seismic source regions for strong earthquakes, geophysical fields (gravity anomaly, highconductivity layer anomaly, and terrestrial heat flow density), and recent vertical crustal deformation fields have been carried out.