Based on the long period surface wave data recorded by the China Digital Seismograph Network (CDSN), the Q R of fundamental mode Rayleigh wave with periods from 10 s to 146 s is determined for the eastern Sino ...Based on the long period surface wave data recorded by the China Digital Seismograph Network (CDSN), the Q R of fundamental mode Rayleigh wave with periods from 10 s to 146 s is determined for the eastern Sino Korean paraplatform in this paper. The Q β models of the crust and upper mantle are respectively obtained for the 4 paths, with the aid of stochastic inverse method. It shows that in the eastern Sino Korean paraplatform, the average crustal Q β is about 200, and that there exists a weak attenuation layer in the middle crust (about 10～20 km deep) which is possibly related to earthquake prone layer. A strong attenuation layer (low Q ) of 70 km thick extensively exists in the uppermost mantle, with the buried depth about 80 km. The average Q R of fundamental mode Rayleigh wave is between the value of stable tectonic region and that of active tectonic region, and much close to the latter.展开更多
文摘Based on the long period surface wave data recorded by the China Digital Seismograph Network (CDSN), the Q R of fundamental mode Rayleigh wave with periods from 10 s to 146 s is determined for the eastern Sino Korean paraplatform in this paper. The Q β models of the crust and upper mantle are respectively obtained for the 4 paths, with the aid of stochastic inverse method. It shows that in the eastern Sino Korean paraplatform, the average crustal Q β is about 200, and that there exists a weak attenuation layer in the middle crust (about 10～20 km deep) which is possibly related to earthquake prone layer. A strong attenuation layer (low Q ) of 70 km thick extensively exists in the uppermost mantle, with the buried depth about 80 km. The average Q R of fundamental mode Rayleigh wave is between the value of stable tectonic region and that of active tectonic region, and much close to the latter.
