简介：Bycalculatingtheazimuth,phaseangleandchangerateoftidalforce,andcontrastingtheirrupturetypes,wefindthatin6of11reversefaultingearthquakes,theanglesbetweenthedirectionofthehorizontaltidalforceandcompressiveprincipalstressarewithin33°,theverticalphaseanglesofall8strike-slipearthquakesareintheupwardpeaksectionandtheverticalphaseanglesoftwoextensionalnormalfaultingearthquakesareinthedownwardpeaksection.Accordingtotheabovestatistics,themechanismoftidalforcetriggeringoftheWenchuanMS8.0Earthquakeanditsstrongaftershocksisdiscussed.
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