中国近震震级量规函数研究

Study on Calibration Function of Local Magnitude ML in China

在中国近震震级标度系统的基础上,依据我国大部分区域的实际观测资料,本文通过震级残差统计分析和近震最大震相平均衰减形态的研究,确立了我国东部地区和西部地区的中国近震震级量规函数R_(LE)(Δ)和R_(LW)(Δ),并约定了它们的使用区域。 中国东部地区:(Δ≤120km) (Δ≥120km) 中国西部地区:(Δ≤120km) (Δ≥120km) R_(LE)(Δ)和R_(LW)(Δ)的确立,突出反映了我国东部地区和西部地区的地震和地壳介质的地区性差异,是对中国近震震级标度系统的完善,它保持了近震震级测定的简单、方便、实用的优点,它的应用将减少震级测定值的离散度,提高区域台网测定近震震级的一致性。

On the basis of the local magnitude scale for earthquakes in China, making use of data observated by most regional networkes in China from 1985 to 1986, the regional calibration function RLE(△)(apply to the eastern China)and RLW(△)(apply to the western China)is established by both the statistical analysis of the magnitude residual and study of the average attenuation shape of the maximal phase for the local shock. And their using regions are difined.For the eastern China:For the western China: