中国东北地区浅源地震活跃期特征分析

Abstract

Abstract: From the perspectives of energy of deep and shallow earthquakes and their energy release ratio as well as duration, the rhythm repetition of the end earthquakes of the fifth activity period and orderly activity image of moderate strong earthquake in the fifth activity period in northeastern China, we analyzed and compared characteristics with that of the former four periods. The results show that the energy release of the fifth activity period is far lower than other activity periods, energy release ratio of deep earthquakes and shallow earthquake is large, and the sustained time is long. The “closing door” earthquakes sustained the rhythm repetition of the former 4 activity periods. The properties of the “closing door” earthquakes include time and spatial clustering as well as earthquake swarm, seismic gap and banded orderly distribution image. The 7 earthauakes of M_S≥5.0 in 2013 may be the “end” earthquakes of the fifth activity period.

Key words: Activity period, Deep earthquake, Shallow earthquake, Northeastern China

CLC Number:

P315.7

GAO Li-xin,DAI Yong. Characteristics of Activity Periods for Shallow Earthquakes in Northeast China[J]. EARTHQUAKE, 2017, 37(2): 115-125.

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Characteristics of Activity Periods for Shallow Earthquakes in Northeast China

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