关键词: 大陆板块, 地震迁移, 中期预报, 塑性流动网络, 塑性流动波, 能量背景区

Abstract: Based on the concepts of plastic-flow network and plastic-flow waves in the continental lithosphere, migration of earthquakes is essentially their moving along”plastic-flow/seismic”belts in network system controlled by the plastic-flow waves. In terms of the inference from the time-space distribution of earthquakes, there are at least two sorts of plastic-flow waves in the central and eastern Asian network svstem, such as the“decade-wave” and” century-wave” in-volving the interrnediate-range prediction of earthquakes. They are of different wave-originated times, wave-originated stages, and wave-crest belts,and different preferential propagation directions and effective action ranges for each stage. The overlapping of the two sorts of wave-crest belts forms the double wave-crest areas in which the portion covered by ” plastic-flow/seismic”belts becomes the energy background areas necessary for earthquakes. It is indicated by examining the situation in 1976 that about 90% of 19 earthquakes with magnitudes ranging 6.0 to 7.9,or about 83%of 6 groups of these earthquakes,distribute in the energy background areas with the corresponding earthquake magnitude ranges.

Key words: Continental plate, Earthquake migration, Medium-term prediction, Plastic-flow Network, Plastic-flow wave, Energy background area