地震学报2012，Vol.34Issue(5)：646-658,13.DOI:10.3969/j.issn.0253-3782.2012.05.006
甘肃测震台网监测能力及地震目录完整性分析
Analysis on the monitoring capability of seismic networks and completeness of earthquake catalogues in Gansu region
摘要
Abstract
The minimum magnitude of completeness (Mc) in earthquake catalogues, which reflects the monitoring capability, plays an important role in studying seismicity and assessing seismic hazards. Based on the observation bulletins and earthquake catalogues in Gansu region, we analyzed temporal and spatial variation of seismic network monitoring capability by using magnitudeorder number, maximum curvature (MAXC), goodness-of-fit test (GFT) and entire magnitude range (EMR) methods. The results show that the monitoring capability has been significantly improved since 1980. The monitoring capability in the southeastern region of Gansu was considerably better than that in Qilian seismic belt during the "analog" recording period and the "9th Five-Year Plan" period. During the "10th Five-Year Plan" period (2001—2005), the spatial differences in earthquake monitoring capability near Gansu and its adjacent areas were significantly decreased. The spatial and temporal distribution of Mc is consistent with that of the monitoring capability. With the upgrading of seismic stations, the minimum magnitude is gradually lowered. Mc could reach as low as ML1. 8 in Gansu and its adjacent areas during the "10th Five-Year Plan" period. In addition, we also discuss the effect of relevant provisions on regional earthquake catalogues and propose a way to eliminate the effect. The results can provide references for analyzing seismic activity and assessing seismic hazards in this region.关键词
完整性震级Mc/震级-频度分布/甘肃测震台网/完整性震级范围Key words
minimum magnitude of completeness/ magnitude-frequency relation/ Gansu seismic network/ EMR分类
天文与地球科学引用本文复制引用
冯建刚,蒋长胜,韩立波,陈继锋..甘肃测震台网监测能力及地震目录完整性分析[J].地震学报,2012,34(5):646-658,13.基金项目
地震科技星火计划(XH1026Y)和国家科技支撑计划课题(2012BAK15B01)联合资助. （XH1026Y）
