地震学报（英文版）2005，Vol.18Issue(5)：521-531,11.
Attenuation of S wave in the crust of Ordos massif
Attenuation of S wave in the crust of Ordos massif
摘要
Abstract
We presented attenuation characteristics of S waves in the crust of Ordos massif. Using 487 pieces of digital oscillograms of 19 seismic events recorded by 32 seismologic stations located on Ordos massif and its surroundings, we have calculated the parameter of three-segment geometric attenuation and give the relation of inelastic attenuation Q value with frequency in the crust of Ordos massif, site responses of 32 stations, and source parameters of 19 events by the genetic algorithm. The results indicate that Q value (at 1 Hz) of S-wave in the crust of Ordos massif is much larger than that in the geologically active tectonic region. The site responses of the 32 stations in the high-frequency section do not show clear amplification effect except one or two stations, while in the low-frequency section, there is difference among the stations. The logarithmic value of seismic moment and the magnitude ML of 19 seismic events has a very good linear relationship.关键词
Ordos massif/geometric attenuation/inelastic attenuation/genetic algorithmKey words
Ordos massif/geometric attenuation/inelastic attenuation/genetic algorithm分类
天文与地球科学引用本文复制引用
LIU Hong-gui,CHUO Yong-qing,CHEN Shu-qing,JIN Chun-hua..Attenuation of S wave in the crust of Ordos massif[J].地震学报（英文版）,2005,18(5):521-531,11.基金项目
National Scientific Research Target Project of China (2004BA601B01-04-03) during the tenth Five-year Plan, Joint Seismological Science Foundation of China (104047) and the Application Lab of Digital Seismic Wave Data in Center for Analysis and Prediction. （2004BA601B01-04-03）
