![]() This formula can be used by seismologists to convert the ML/MS of Chinese mainland events into their seismic moments. The obtained relationships are as follows: logMo=18.21+1.05ML logMo=17.04+1.32MS. ![]() We also computed the relationships of and (where Mo is the seismic moment) by linear regression using the Global Centroid Moment Tensor. These relationships are very important, because they will allow the China earthquake catalogs to be used more effectively for seismic hazard analysis, earthquake prediction, and other seismology research. Therefore, in China, if the moment magnitude of an earthquake is not reported by any agency in the world, we can use the equations mentioned above for converting ML to MW and MS to MW. The obtained relationships are as follows: MW=0.64+0.87MS MW=1.16+0.75ML. The China Earthquake Networks Center (CENC) ML catalog, China Seismograph Network (CSN) MS catalog, ANSS Comprehensive Earthquake Catalog (ComCat), and Global Centroid Moment Tensor (GCMT) are adopted to regress the relationships using the orthogonal regression method. In the present work, we studied the empirical relationships between moment magnitude (MW) and local magnitude (ML) as well as surface wave magnitude (MS) in the Chinese Mainland. ![]() However, in China, the earthquake scale is primarily based on local and surface-wave magnitudes. Now the moment magnitude is very commonly used in seismology research. Measurements on the moment magnitude scale are determined using a complex mathematical formula to convert motion recorded with a seismometer into a. Designed to adhere closely to local magnitude ratings, the moment magnitude scale uses the earthquakes momenta calculation involving the ratio of shear. The formula above, for the moment of an earthquake, is fundamental to. Fortunately, the problem of magnitude saturation was solved by a formula for calculating the seismic moment magnitude (MW) based on the seismic moment, which describes the seismic source strength. Seismologists use a Magnitude scale to express the seismic energy released by each. However, several current types of magnitudes used in seismology research, such as local magnitude (ML), surface wave magnitude (MS), and body-wave magnitude (MB), have a common limitation, which is the magnitude saturation phenomenon. It plays a significant role in seismology and earthquake engineering research, particularly in the calculations of the seismic rate and b value in earthquake prediction and seismic hazard analysis. The magnitude of an earthquake is one of its basic parameters and is a measure of its scale.
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