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首页> 外文期刊>Geomatics,Natural Hazards & Risk >Moment magnitude?????￠????????local magnitude relationship for the earthquakes of the Shillong-Mikir plateau, Northeastern India Region: a new perspective
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Moment magnitude?????￠????????local magnitude relationship for the earthquakes of the Shillong-Mikir plateau, Northeastern India Region: a new perspective

机译：印度东北地区西隆-米吉尔高原地震的矩震级关系：新观点

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An attempt has been made to examine the empirical relationship between moment magnitude ( M W ) and local magnitude ( M L ) of earthquakes recorded in the Shillong-Mikir Plateau of Northeastern India. Moment tensor solutions of 106 earthquakes recorded during the period 1976?￠????2009 are used. The focal mechanism solutions of these earthquakes include 1 Harvard-CMT solution ( M W ?????￠???￥????4.0), 54 solutions from different publications and 51 solutions obtained for the local earthquakes (2.0?????￠???¤???? M L ?????￠???¤????5.0) recorded by a 20-station permanent broadband network during 2001?￠????2009 in the region. The moment tensor solutions of these local earthquakes are obtained by the discrete wave number method. The M W ?￠????M L relationship in the region is determined by generalized orthogonal regression analysis, which is found to be M W ???? =????M L (1.00???????±????0.02)????+ (0.02???????±?????￠????0.05). It is observed that, on average, M W is equivalent to M L with an uncertainty of about (0.02???????±?????￠????0.05) magnitude units for earthquakes of the Shillong-Mikir Plateau. Conversion of M L to M W is recommended for seismic hazard analysis and tectonic studies in the region.
机译：已经尝试检查印度东北部西隆-米吉尔高原记录的地震的矩量级（M W）和局部地震级（M L）之间的经验关系。使用1976年至2009年期间记录的106次地震的矩张量解。这些地震的震源机制解包括1个Harvard-CMT解（MW = 4.0），来自不同出版物的54个解和针对当地地震获得的51个解（2.0％）。该区域在2001年至2009年期间由20个站点的永久宽带网络记录的ML（ML）5.0。这些局部地震的矩张量解是通过离散波数法获得的。通过广义正交回归分析确定该区域中的M W≥φ≤ML的关系，发现为M W≤φ≤M。 ＝···M L（1.00····················································（0.02）（0.05）。可以观察到，对于西隆-米奇尔高原地震，MW平均相当于ML，不确定度约为（0.02 ???????????????????? 0.05）大小单位。 。建议将该区域的M L转换为M W，以进行地震危险性分析和构造研究。

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