The Migration Characteristics of Strong Earthquakes on the North2 South Seismic Belt and Its Relation

Migration of strong earthquakes ( M ≥710) along the North2South Seismic Belt of China since 1500 AD shows three patterns: Approximately equal time and distance interval migration from N to S, varied patterns of migration from S to N and grouped strong earthquake activity in a certain period over the entire seismic belt. Analysis of strong earthquakes in the past hundred years shows that the seismicity on the North2South Seismic Belt is also associated with strong earthquake activities on the South Asia Seismic Belt which extends from Myanmar to Sumatra, Indonesia. Strong earthquakes on the former belt often lag several months or years behind the quakes occurring on the later belt. So, after the occurrence of the December 26, 2004 MS817 great earthquake off the western coast of Sumatra, Indonesia, the possibility of occurrence of strong earthquakes on the North2South Seismic Belt of China cannot be ignored. The above2 mentioned migration characteristics of strong earthquakes are related to the northeastward collision and subduction of the India Plate as well as the interaction between the Qinghai2Xizang ( Tibet) Plateau and the stable and hard Ordos and Alashan Massifs at its northeaster