【摘要】 为确定"地震可预测性国际合作研究计划"(CSEP)中的"CSEP中国检验中心"研究区范围,本研究采用"完整性震级范围"(EMR)方法研究了2008年10月1日至2011年5月31日期间南北地震带地区的最小完整性震级Mc的空间分布特征,并使用Bootstrap方法评估Mc的不确定度。对该地区整体Mc的研究结果表明,Mc(EMR)=1.6±0.03。对Mc的空间分布特征研究表明,南北地震带的多数地区Mc在ML1.3～2.0范围内,中、南段监测能力较高,北段偏低,Mc与地震台站密度分布较为一致,采用少于3台定位对Mc的分布影响较大。此外,多数地区最小完整性震级不确定度δMc的空间分布在0.07～0.22个震级单位之间,分布特征与地震发生率有较好的一致性,但研究时段较短可能造成部分地区δMc值较大。更多还原

【Abstract】 To determine the studying region of China Testing Center of Collaboratory for the Study of Earthquake Predictability(CSEP),we used the entire-magnitude-range(EMR) method to study the spatial distribution of minimum magnitude of completeness(Mc) in the North-South Seismic Belt from Oct.1,2008 to May 31,2011.Also bootstrap testing are performed to estimate the uncertainty of Mc,i.e.δMc.The results show that Mc(EMR)=1.6±0.03 for the whole region.From the spatial distributions of Mc,we find that Mc is in the range of ML1.3~2.0 for most regions.Specifically,the spatial distributions of Mc are consistent with the distributions of stations with high monitor level in the south segment and low monitor level in the north segment.Location with less than three stations has a great influence on Mc.Moreover,the uncertainties of minimum magnitude of completeness(δMc) range from 0.07 to 0.22.The spatial distribution of δMc is consistent with the seismic rate.Shorter time interval may cause larger δMc.更多还原