库尔勒地震台远震体波震级偏差分析

选取库尔勒地震台2008—2015年记录的数字地震资料,与中国地震台网测定的体波震级进行对比,从震级大小、震中距、震源深度以及震中方位,分析二者之间的关系。结果可知,库尔勒地震台计算震级相对偏大,其中mb平均偏差为0.1455,mB平均偏差为0.1941;震源深度在0—96km时,mb和mB震级偏差接近平均值;当震源深度h>96km时,测定震级和中国地震台网测定震级基本一致;地震发生在第三象限时,台站测定震级与中国地震台网测定震级基本一致。

Analysis of seismic magnitude deviation of Korla Seismic Station

The digital seismic data were selected from 2008 to 2015 at Korla Seismic Station, comparing with the magnitude of body wave measured by China Earthquake Networks, the relationship between the magnitude, epicenter distance, focal depth and epicenter location was analyzed. According to the analysis results, the average deviation of m_b is 0.145 5 and the average deviation of m_B is 0.194 1, which indicates that the magnitude of the station calculation is relatively large. When the depth of the seismic source is 0-96 km, the magnitude deviation of m_b and m_B is close to the average. When the depth of the seismic source is h > 96 km, the measured magnitude is basically the same as that measured by China Earthquake Networks. When the earthquake occurs in the third quadrant, the measured magnitude of the station is basically the same as that measured by China Earthquake Networks.