| 摘要: |
| 基于S震相"S窗"内的波形信号识别、品质因子Q（f）和22个台站场地响应，利用2009~2016年3月内蒙古中西部地区地震的波形资料，反演了182次中小地震的震源波谱参数，得到这些小震的零频幅值及其拐角频率，据此计算了这些地震的地震矩M0、矩震级MW和应力降△σ。利用回归分析方法得到了近震震级与矩震级、矩震级与应力降的关系式。分析表明，近震震级与矩震级、矩震级与应力降呈线性关系。可见，将矩震级纳入地震的快报与正式目录中，可以丰富地震观测报告内容，更好地为地震应急和地震科研服务。 |
| 关键词: 内蒙古中西部 中小地震 地震矩 矩震级 |
| DOI： |
| 分类号:P315 |
| 基金项目:中国地震局地震科技星火项目（编号：XH15008）、内蒙古自治区科技重大专项《重点地区地震预测预警技术研究开发与推广示范》联合资助 |
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| Study on the moment magnitude of small and moderate earthquakes in the Inner Mongolia Region |
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Liu Fang, Zhang Fan, Li Bin, Na Re
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Earthquake Administration of Inner Mongolia Autonomous Region, Hohhot 050051, China
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| Abstract: |
| Based on digital seismic waveform data from the Inner Mongolia Digital Seismic Network,source spectrum parameters of 182 small and moderate earthquakes from January 2009 to September 2016 are derived and the seismic moment M0 and moment magnitude MW of the earthquakes are calculated. The ML-MW relational expression between stress drop and magnitude are obtained using linear regression method. Visible incorporating the moment magnitude can enrich the earthquake observation report content,and provide better service for earthquake emergency and earthquake scientific research. |
| Key words: Small and moderate earthquake Moment magnitude Seismic moment |
