Magnitude conversion problem for the Turkish earthquake data
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- 作者：Aykut Deniz and M. Semih Yucemen
- 关键词：Earthquake magnitude conversion ; Moment magnitude ; Orthogonal regression ; Standard least squares regression
- 刊名：Natural Hazards
- 出版时间：November 2010
- 出版年：2010
- 期刊代码：33_0921030X
- 类别：soc
- 卷：55
- 期：2
- 页码：333-352
- 数据来源：sp
摘要
Earthquake catalogues which form the main input in seismic hazard analysis generally report earthquake magnitudes in different scales. Magnitudes reported in different scales have to be converted to a common scale while compiling a seismic data base to be utilized in seismic hazard analysis. This study aims at developing empirical relationships to convert earthquake magnitudes reported in different scales, namely, surface wave magnitude, M S, local magnitude, M L, body wave magnitude, m b and duration magnitude, M d, to the moment magnitude (M w). For this purpose, an earthquake data catalogue is compiled from domestic and international data bases for the earthquakes occurred in Turkey. The earthquake reporting differences of various data sources are assessed. Conversion relationships are established between the same earthquake magnitude scale of different data sources and different earthquake magnitude scales. Appropriate statistical methods are employed iteratively, considering the random errors both in the independent and dependent variables. The results are found to be sensitive to the choice of the analysis methods.