Magnitude determination using cumulative absolute absement for earthquake early warning

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 mag...

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Bibliographic Details
Published in:Geoscience letters 2023-12, Vol.10 (1), p.59-7, Article 59
Main Authors: Wu, Yih-Min, Mittal, Himanshu, Lin, Yueh-Ho, Chang, Yu-Hsuan
Format: Article
Language:English
Subjects:
Atmospheric Sciences
Biogeosciences
Early Warning
Earth and Environmental Science
Earth science
Earth Sciences
Earthquake
Earthquakes
Geophysics/Geodesy
Magnitude
Nuclear power plants
Oceanography
P waves
Planetology
Research Letter
Seismic activity
Standard deviation
Velocity
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Summary: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 .
ISSN:2196-4092
2196-4092
DOI:10.1186/s40562-023-00314-6