福建省“九五”地震监测台网台站震级校正及单台震级应用研究

Studies on Single Station’s Magnitude Biases Correction in Fujian "nine-five" Earthquake Network and Its Applications

首先介绍了福建省地震监测台网的建设和发展情况,在总结震级计算方法的基础上,分析了福建省"九五"地震监测台网中29个台站的平均震级偏差对台网震级确定造成的影响,并以此为依据对台网内单台测定震级进行校正。然后分网内和网外两种情况,分别回归得到了由单台(首台)震级确定最终震级的关系,并对单台震级测定所需时间进行了统计。结果表明,对平均台间距60 km的网内地震,一般在单台P波到达后的10 s内即可由单台震级估计出最终震级。

This paper briefly introduces the construction and development of Fujian earthquake monitoring network. Based on original earthquake magnitude calculation methods, the paper analyzes the magnitude biases of the 29 stations in the ＂nine-five＂ network and its influence on the final network＇s magnitude result. Based on this, the paprer calibrates the single station＇s magnitude result. Then the paper regresses the relationship between single station＇s magnitude result and final network＇s magnitude result for inner and outer cases respectively, and records the time needed for the single station＇s magnitude calculation. The result showed that using the magnitude calculation method presented in this paper, it cost about 10 minutes to estimate the magnitude for earthquakes in the network.