On seismic strengthening area before strong and great shocks and its mechanism |
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| Authors: | ZHI-PING SONG SHI-RONG MEI XIANG-CHU YIN |
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| Institution: | 1. Beijing Seismological Bureau, Beijing 100080, China
2. Center for Analysis and Prediction, China Seismological Bureau, Beijing 100036, China |
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| Abstract: | By systematically studying seismic strengthening areas before 85 earthquakes with M≥6.0 in China, some results have been extracted. (1) Earthquake active strengthening area exists universally before strong
shock or great earthquake; (2) The size of the strengthening area and its appearing time will increase when the earthquake
magnitude increases; (3) The rate between the size of seismic strengthening area and the size of the source region decreases
when earthquake magnitude increases; (4) The appearing time of the earthquake active strengthening region in the eastern part
of China is longer than that in the western part of China. The above characteristics have been preliminarily explained qualitatively
and half-quantitatively by applying the strong body earthquake generating model and the hard inclusion theory. Then applying
the seismic strengthening area, we have obtained long-term predictions of 2 earthquakes, so the seismic strengthening area
before strong earthquake or great earthquakes is a universal phenomenon, which has some mechanical base.
This research was supported by the Chinese Joint Seismological Science Foundation (198085). |
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| Keywords: | seismic activity seismic strengthening area strong body earthquake generating model hard inclusion theory predicting practice |
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