Discrimination Between Foreshocks and Earthquake Swarm from the Change of First Motion Sign

来源 :Earthquake Research in China | 被引量 : 0次 | 上传用户:wuchen2007
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Based on the data of first motion of 11 earthquake sequences with ML ≥ 3.0 recorded by the Telemetric Seismic Network of Shanxi since the 1980s, the first motion characteristics of each earthquake sequence were studied. It is known that earthquake sequences of different types have different consistency characteristics of focal mechanism. The decrease and increase of the first motion contradictory sign ratios could be taken as an index to judge whether there would still be a larger earthquake to come after the earthquake sequence. Based on the data of first motion of 11 earthquake sequences with ML ≥ 3.0 recorded by the Telemetric Seismic Network of Shanxi since the 1980s, the first motion characteristics of each earthquake sequence were studied. It is known that the earthquake sequences of different types have more consistency The decrease and increase of the first motion contradictory signal could be taken as an index to judge whether there would yet be a bigger earthquake to come after the earthquake sequence.
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