2010年滦县地震序列视应力变化研究

Abstract

Abstract: On March 6, 2010, an earthquake of M_L4.5 took place in Luanxian of Hebei province with plenty of foreshocks and aftershocks. From December 2009 to March 2010, a series of greater than M_L2.5 earthquakes recorded by digital seismic network of the capital region, which were selected to calculate the apparent stress in this region. The result shows that, Firstly, high value anomaly of apparent stress appeared before the M_L4.5 and peak value appeared on the mainshock, then it decreased after the M_L4.5 earthquake. The apparent stress of the mainshock is much greater than most aftershocks, the sequence type is considered as majorafter shocks. Secondly, the size of apparent stress perfectly reflect the state of the stress field in the hypocenter region, and we can discuss seismic sequence properties through the changing process of apparent stress, in combination with the traditional methods to identify sequence more accurately. Finally, in the case of magnitude less than or equal to M_L3.3, correlation between magnitude and apparent stress is positive.

Key words: Apparent stress, focal mechanism solution, Luanxian earthquake sequence

CLC Number:

P315.7

LI He, LIU Wen-bing, WANG Yi-xi, LIU Shuang-qing, GONG Yong-jian, SHANG Qing-qi, GAO Ye. Apparent Stress Changes of the 2010 Luanxian Earthquake Sequence[J]. EARTHQUAKE, 2015, 35(1): 47-54.

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Apparent Stress Changes of the 2010 Luanxian Earthquake Sequence

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