山西断陷盆地地震目录最小完整性震级分析  

Analysis on Minimum Earthquake Magnitudes of Catalogue Completeness in Shanxi Rift Basins

作　　者：王霞[1,2] 宋美琴[1,2] 李丽[1,2] 

机构地区：[1]山西省地震局,山西太原030021 [2]太原大陆裂谷动力学国家野外科学观测研究站,山西太原030025

出　　处：《山西地震》2013年第3期6-10,共5页Earthquake Research in Shanxi

基　　金：山西省地震局2013年科研项目(SBK-1301);山西省自然科学基金(2012011029);山西省科技攻关项目(201003111292;20090311084);中国地震局星火计划(xh1005;xh13004)联合资助

摘　　要：地震目录的最小完整性震级M C是地震学中最基础、最重要的研究内容之一,也是表征台网监测能力的关键。以1970年至2012年山西断陷盆地地震目录为基础资料,利用"震级—序号"法、"最大曲率"法(MAXC)、90%和95%的拟合度GFT法,研究了山西断陷盆地地震目录最小完整性震级M C的时间演化特征。分析结果表明,1970年以来,随着山西测震台网的改造,M C逐步降低,尤其是"十五"数字化台网改造后,山西M L≥0.9地震基本完整,表明对地震的监测能力在逐步提升。The minimum magnitude of catalogue completeness （Mc ） is one of the most fundamental and important parameters for earthquake study, which is the key to reflect the monitoring capability of a seismic network. Based on the 1970 -2012 earthquake catalogue in Shanxi rift basins, we analyzed temporal variation of the minimum earthquake magnitude of completeness for catalogue by using magnitude-order number, maximum curvature （MAXC） and goodness-of-fit test （GFT） methods. The results show that the Mc is gradually going down with the upgrading of seismic network from 1970, especially after the time of ＂10th Five-Year Plan＂, and could reach as low as MLO. 9, which in- dicates that the earthquake monitoring capability in Shanxi has been significantly improved.

关 键 词：地震观测台网 监测能力 山西断陷盆地 最小完整性震级 

分 类 号：P315.3[天文地球—地震学]