摘要
利用宁夏及邻区的数字地震波资料,选取2009-05—2010-10月ML2.6以上的20个台站32次地震事件的268条波形记录,用遗传算法反演了宁夏及邻区介质非弹性衰减系数和台站场地相应。反演得到:宁夏地区介质非弹性衰减Q值与频率的关系为Q(f)=337.67f0.4554。其Q值和山西及浙江地区的结果最相近,可能预示着该区地质构造活动处于一个正常的活动水平。
268 pieces of digital oscillograms of 32 seismic events of form ML2.6 to ML4.9 recorded at 20 seismologic stations located on Ningxia region and its adjacent areas occurred from May, 2009 to Oct. , 2010 were studied and the relation of inelastic attenuation Q value with media frequency in the crust of this area, the site responses of 20 stations were calculated with the genetic algorithm. The results indicate that the frequency-dependent relation of inelastic attenuation value Q in the studied area is estimated as： Q（f） = 337.67f^0.4554. The Q value is close to the regional result in Shanxi and Zhejiang. It probably indicate that the geological tectonic activity is in a normal level.
出处
《大地测量与地球动力学》
CSCD
北大核心
2011年第B06期33-37,共5页
Journal of Geodesy and Geodynamics
关键词
宁夏地区
Q值
遗传算法
场地响应
非弹性衰减
Ningxia area
Q value
genetic algorithm
site response
inelastic attenuation
