A study of the regional variation of low-frequency Q(Lg)(-1) around the Korean Peninsula

作者：Chung Tae Woong^*; Noh Myung Hyun; Kim Junk Kyong; Park Yun Kyong; Yoo Hyun Jae; Lees Jonathan M

来源：Bulletin of the Seismological Society of America, 2007, 97(6): 2190-2197.

DOI：10.1785/0120070066

We studied regional Q(Lg)(-1) at 1 Hz (Q(0)(-1)) around the Korean Peninsula based on broadband vertical component seismic records of six Incorporated Research Institutions for Seismology (IRIS) Global Seismographic Network stations and 19 Korean stations of the Korea Institute of Geoscience and Mineral Resources (KI-GAM). Using 177 seismic events with magnitudes between 5.3 and 5.7 and depths less than 50 km, the reversed two station method was applied, and 94 high quality interstation paths were selected from 869 possible pairs. These results show high Q(0)(-1) paths around the Sea of Japan (East Sea) reflecting the typical oceanic structure and low Q(0)(-1) paths around northeastern China related to inactive seismicity. Assigning these path values into 193 cells around South Korea with a size of 1 degrees by 1 degrees, we observed that the regional Q(0)(-1) decreased gradually from east to west between 2 and 1 X 10(-3).

• 出版日期2007-12
• 单位中国极地研究中心