利用Sato模型研究上海及邻近地区尾波Q值

摘要

This paper uses seismic data aboveML2.0 recorded by Changshu Seismic Station, Jinze Seismic Station, Sheshan Seismic Station in Shanghai and its neighboring regions from 2011 to 2013. It calculatesQ value of coda of these regions based on Sato model, by using different elapsed time. The results show that: the area is of lowQ value and high frequency dependent, One and the same Q value of coda is different under different elapsed time. The longer elapsed time is, the largerQ value is, TheQ value of coda increased before Jiangsu BaoyingML5.0 earthquake on July 20, 2012.%利用2011年至2013年上海及邻近地区的常熟地震台、金泽地震台、佘山地震台记录的ML2.0以上地震波资料，基于Sato模型，采用不同的流逝时间，计算该区域的尾波Q值。结果表明：该区域为低Q值、高频率依赖性区域；不同流逝时间下同一个地震的Q值是不同的，流逝时间越长Q值越大；在2012年7月20日江苏宝应ML5.0级地震发生前，尾波Q值存在增大现象。