动态灵敏度标定及其在震级确定中的应用

The calibration of dynamic sensitivity and its application in magnitude calculation

地震仪系统的灵敏度是计算地震震级的重要参数之一。由于获得灵敏度数值的方法比较复杂，且会对地震台网的正常运行造成一定程度的影响，因此本文通过地震台网每13的脉冲标定及时掌握地震仪系统灵敏度的变化情况。本文讨论了对于EDAS-24B数采，当A／D转换因子Kad由高（低）档位变到低（高）档位时，这种变化对震级的影响大约为＋0．3级。

The sensitivity of seismograph system is one of the most important parameters in magnitude calculation. For the reason of the complexity of sensitivity acquisition, and the influence on routine running of the seismic network, we tried to use daily calibration results to judge whether the sensitivity changes. We think the changes of Kad bring 0.3 errors to the magnitude.