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2013年7月22日甘肃岷县6.6级地震是十年来发生在甘肃省破坏性最大的地震。本文对距震中距18~218 km以内的22个强震动台所获取的主震记录进行了分析处理,研究了该次地震在强震动台站分布方向上的衰减规律。将根据衰减规律得出的烈度区域与震后灾害评估的烈度图比较后发现,分析得出的Ⅷ度、Ⅶ度区范围相对略大,Ⅵ度以下区域范围则大致相当,其原因应该与近场的强震动记录较少有关系。
July 22, 2013 Minxian MS 6.6 earthquake in Gansu Province was the most devastating earthquake in Gansu Province in the past ten years. In this paper, the main shock records acquired by 22 strong seismic stations within 18 ~ 218 km from the epicentral distance are analyzed and treated, and the decay law of this earthquake in the distribution direction of strong vibration stations is studied. Comparing the intensity region obtained from the attenuation law with the intensity map of the post-earthquake disaster assessment, it is found that the range of the Ⅷ degree and Ⅶ degrees regions obtained by the analysis is relatively large while the region below the Ⅵ degree is roughly the same, Strong field vibrations record less relevant.