内蒙古西部地区量规函数的修订

Revision of Gauge Function in Western Inner Mongolia

选用2008-2019年内蒙古自治区及邻省台网共43个台站记录到的4410个地震事件,通过震级偏差统计方法计算单台震级偏差及其标准差,并统计台站震级平均偏差随震中距的变化。研究表明,各个台站震级偏差范围在-0.38~0.33之间,81.4%的台站偏差值(绝对值)小于0.2。与全国量规函数相比,新修定的量规函数震级偏差与震中距整体呈正相关,在0~150 km范围内震级偏差为负值,在150~200 km范围内震级偏差大于0且基本与100~150 km内的震级偏差关于零轴对称,250~500 km范围内为正值,新修定的量规函数更加符合内蒙古西部地区的地壳介质性质和构造条件。

Based on 4410 earthquake events recorded by 43 stations in Inner Mongolia and adjacent provinces from 2008 to 2019,the magnitude deviation and standard deviation of single station are calculated by the statistical method of magnitude deviation,and the variation of mean magnitude deviation with epicentral distance is counted.The results show that the magnitude deviation of each station ranges from-0.38 to 0.33,and 81.4%of the station deviation(absolute value)is less than 0.2.Compared with the national gauge function,the magnitude deviation of the newly revised gauge function is positively correlated with the epicentral distance as a whole.The magnitude deviation is negative in the range of 0~150 km,and greater than 0 in the range of 150~200 km.The magnitude deviation within this range is basically symmetrical about the zero axis,and is positive in the range of 250~500 km.The newly revised gauge function is more in line with the crustal medium properties and tectonic conditions in western Inner Mongolia.