摘要
利用山西数字测震台网"十五"数字化之后34次ML2.5～ML5.2级地震波形资料,采用Atkinson方法反演出非弹性衰减Q值随频率f的关系为Q(f)=469.5 f0.3141;采用Moya方法反演得出41个台站的场地响应,结果显示出仪器安置在山洞且地处外界干扰小的台站没有明显的放大效应,而其它台站尽管都是基岩台,均存在不同程度的放大效应。根据Brune方法计算出这些地震的震源参数,进而分析了ML震级与地震矩、应力降、矩震级之间的相互关系。
Based on waveform data of 34 ML2.5-ML5.2 earthquakes from Shanxi digital seismic network, the relationship between inelastic attenuation Q value and frequency f are inversed using Atkinson method, which is Q（f）=469.5 f^0. 3141 Site response of 41 seismic stations are calculated through the Moya method. The results shows that stations installed in cave do not show obvious site amplification effect, all the other stations, although installed on bedrock, show site amplification effect in varying degree. Source parameters of the 34 earthquakes are calculated using Brune method; Relationships between ML magnitude and seismic moment, ML magnitude and stress drop, ML magnitude and moment magnitude are also studied.
出处
《华北地震科学》
2011年第4期7-14,共8页
North China Earthquake Sciences
基金
星火项目(XH1004Y)
山西省科技攻关项目(20100311129-1)共同资助
关键词
山西地区
Q值
震源谱
场地响应
震源参数
Shanxi region
Q value
source spectrum
site response
source parameter
