1. Magnitude determination using cumulative absolute absement for earthquake early warning.
- Author
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Wu, Yih-Min, Mittal, Himanshu, Lin, Yueh-Ho, and Chang, Yu-Hsuan
- Subjects
EARTHQUAKES ,STANDARD deviations ,EARTHQUAKE magnitude ,WARNINGS - Abstract
The cumulative absolute absement (CAA) of the 3 s window after P-wave arrival can be used to estimate the magnitude ( M CAA ) of an earthquake. This method can achieve good results even when only the six stations nearest to the epicenter are used. The standard deviation between the estimated CAA magnitude ( M CAA ) and the moment magnitude ( M w ) is found to be 0.3 when using either 6 or 20 stations. This means that M CAA can be reliably predicted using the closest 6 stations. On the other hand, the magnitude ( M Pd ) derived from P d using the closest 20 stations has a standard deviation of 0.4 between the estimated M Pd and M w . This suggests that CAA is a better magnitude determination parameter for the EEW system than P d . [ABSTRACT FROM AUTHOR]
- Published
- 2023
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