| 多方法联合评估河套地震带的台网监测能力 |
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| 引用本文： | 韩晓明,刘芳,张帆,赵星.多方法联合评估河套地震带的台网监测能力[J].地震,2015,35(4):64-75. |
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| 作者姓名： | 韩晓明 刘芳 张帆 赵星 |
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| 作者单位： | 内蒙古自治区地震局, 呼和浩特 010010 |
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| 基金项目： | 中国地震局地震科技星火计划项目(XH15010Y)和内蒙古自治区应用研发项目(20120427)联合资助 |
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| 摘 要： | 使用删除余震后的地震目录, 综合运用多种方法进行Mc值的定量计算和对比分析, 对河套地震带的台网监测能力的时空变化进行分析判定。 结果表明, 1970年以来, 河套地震带的台网监测能力整体呈现逐步增强趋势。 在Bootstrap次数为200的条件下, MAXC方法确定的研究区整体Mc值为ML2.7±0.07, δMc的分布基本控制在ML0.1～0.4之间, EMR方法给出的Mc时序变化范围是ML1.6～2.8; 多方法联合测定的Mc值变化范围为ML1.8～3.3, R/S检验给出的结果是ML3.4。 对比发现, 余震删除对最小完整性震级的计算有一定影响, R/S检验求取的最小完整性震级在余震删除前后相差ML0.9; 整体来看, Mc值随时间演化逐渐减小, 较小时空范围内的Mc值仍有显著的非均匀性变化现象, 不同时段内台网布局的空间调整以及地震事件的时空非均匀性活动可能是主要原因。
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| 关 键 词： | Mc值计算 多方法联合评估 余震删除 R/S检验 河套地震带 |
| 收稿时间： | 2015-03-19 |
Multi-method Assessment of Network Monitoring Capabilities for the Hetao Seismic Belt |
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| HAN Xiao-ming,ZHANG Fan,ZHAO Xing.Multi-method Assessment of Network Monitoring Capabilities for the Hetao Seismic Belt[J].Earthquake,2015,35(4):64-75. |
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| Authors: | HAN Xiao-ming ZHANG Fan ZHAO Xing |
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| Institution: | Earthquake Administration of Inner Mongolia Autonomous Region, Hohhot 010010, China |
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| Abstract: | Using earthquake catalogue after deleting aftershocks, we combined several kinds of methods to quantitatively calculate and analyze the least magnitude of completeness (Mc) in the Hetao seismic belt. We analyze and judge temporal changes of network monitoring capabilities for this belt. The results show that, since 1970, Hetao seismic belt's network monitoring capabilities has been gradually increasing. Under the condition of Bootstrap 200 times, the Mc value is ML2.7±0.07 and the distribution of δMc is basicly controlled in ML0.1～0.4 by the MAXC methods, however the Mc value is ML1.6～2.8 by the EMR methods. The range of Mc by the multi-method determined is ML1.8～3.3, the result of R/S test is ML3.4. By comparison, we found that aftershock deletion has notable influence in the calculation of Mc, in particular, Mc had ML0.9 deference before and after deleting the aftershocks by R/S test. On the whole, Mc is decreasing with time, but there are significant non-uniformity changes in small spatial and temporal scales. Maybe, the spatial adjustment of network and the non-uniformity activity of earthquakes are the main factors. |
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| Keywords: | Calculation of Mc Multi-method assessment Aftershock deletion R/S test Hetao seismic belt |
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