摘要
使用＂完整性震级范围＂（EMR）方法研究2010~2014年5年期间天山地震带地区地震目录最小完整性震级MC的空间分布特征,使用Bootstrap方法的蒙特卡罗近似估计了MC的不确定度。近5年研究区整体MC=1.7±0.12,空间分布存在较大的非均匀性,多数地区MC都在ML1.2~2.0范围内,δMC的空间分布在0.08~0.25个震级单位之间。此外,利用EMR方法得到1990年以来天山地震带地区最小完整性震级MC的时间演化情况,MC的值整体上呈现下降的趋势。
This paper used the entire-magnitude-range（EMR） method to study the spatial distribution of minimum magnitude of completeness MCin Tianshan seismic zone from 2010 to 2014.Bootstrap testing method is also performed to estimate the uncertainty of MC.The results show that MC（EMR） = 1.7 ± 0.12 for the whole region.The distribution of MCis spatially inhomogeneous,and MCis in the range of ML1.2 ~ 2.0 for most regions.Moreover,the uncertainties of minimum magnitude of completeness δMCranges from 0.08 to 0.25,and its distribution is also spatially inhomogeneous.Besides,the temporal evolution of minimum magnitude of completeness MCin Tianshan seismic zone since 1990 has been achived with EMR method,and the MChas a tendency to decline.
出处
《内陆地震》
2016年第2期97-102,共6页
Inland Earthquake
关键词
天山地震带
地震编目
最小完整性震级EMR方法
Tianshan seismic zone
Earthquake catalogues
Minimum magnitude of completeness MC
