Depth and region dependence of b-value for micro-aftershocks of the May 12th,2008 Wenchuan earthquake and its tectonic implications |
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Authors: | Mei Feng Meijian An Lin Zhao Jizhong Zhang Institute of Geomechanics Chinese Academy of Geological Sciences Beijing China |
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Institution: | Mei Feng Meijian An Lin Zhao and Jizhong Zhang Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China |
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Abstract: | Micro-aftershocks with magnitude range of 1.5?4 around the Wenchuan earthquake epicenter,the southern part of the Longmenshan fault zone,exhibit good frequency-magnitude linear relationships,thus enabling b-value analysis.The average b-value for micro-aftershocks of M1.5?4 from July to December of 2008 in our local study region is about 0.88,similar to the b-value for all aftershocks of M3.0?5.5 from May,2008 to May,2009 along the whole Longmenshan fault zone.The similarity between the local and regional b-... |
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Keywords: | micro-aftershocks frequency-magnitude relationship tectonic implication Wenchuan earthquake |
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