赤峰—辽蒙交界地区地震活动性及平均波速比分析
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摘要
分析了赤峰地区地质构造特征、地球动力学环境、历史中强地震活动,表明该区域具备发生中强地震的构造条件;2008年以来的地震活动表明,辽蒙交界地区存在发生5级以上中强震的危险性,该地区的波速比震前异常能够为该地区的地震中期预测提供一定的判定依据。
The characteristics of geological structure,geodynamical condition and historical moderately strong earthquake activity in Chifeng area are analyzed,the results indicate that this region has the condition to occur moderately strong earthquakes,and since 2008,the seismic activity also indicate that the common boundary of Liaoning province and Inner Mongolia has the risk of occurring earthquakes with Ms≥5.0,and the velocity ratio(VP/VS) anomalies before earthquake can be as medium term forecast index in this area.
The characteristics of geological structure,geodynamical condition and historical moderately strong earthquake activity in Chifeng area are analyzed,the results indicate that this region has the condition to occur moderately strong earthquakes,and since 2008,the seismic activity also indicate that the common boundary of Liaoning province and Inner Mongolia has the risk of occurring earthquakes with Ms≥5.0,and the velocity ratio(VP/VS) anomalies before earthquake can be as medium term forecast index in this area.
引文
[1]钟以章,王辉,曲乐.赤峰地区地震地质条件的初步研究[J].东北地震研究,2006,22(1):18-25.
[2]张学民,刁桂苓,柬沛镒,等.华北地区地下介质波速比值(VP/VS)研究[J].地震地质,2004,26(2):305-317.
[3]高立新.中国松辽盆地构造环境及东北地区地震活动特征分析[J].地震,2008,28(4):57-67.
[4]韩晓明,荣代潞.2004年6月甘肃临泽震群前的地震学参数变化研究[J].高原地震,2006,18(3):1-7.
[2]张学民,刁桂苓,柬沛镒,等.华北地区地下介质波速比值(VP/VS)研究[J].地震地质,2004,26(2):305-317.
[3]高立新.中国松辽盆地构造环境及东北地区地震活动特征分析[J].地震,2008,28(4):57-67.
[4]韩晓明,荣代潞.2004年6月甘肃临泽震群前的地震学参数变化研究[J].高原地震,2006,18(3):1-7.
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