Magnitude determination using cumulative absolute absement for earthquake early warning
Abstract The cumulative absolute absement (CAA) of the 3 s window after P-wave arrival can be used to estimate the magnitude ( $${M}_{CAA}$$ 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 betwee...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2023-12-01
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| Series: | Geoscience Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s40562-023-00314-6 |
| Summary: | Abstract The cumulative absolute absement (CAA) of the 3 s window after P-wave arrival can be used to estimate the magnitude ( $${M}_{CAA}$$ 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 ( $${M}_{CAA}$$ M CAA ) and the moment magnitude ( $${M}_{w}$$ M w ) is found to be 0.3 when using either 6 or 20 stations. This means that $${M}_{CAA}$$ M CAA can be reliably predicted using the closest 6 stations. On the other hand, the magnitude ( $${M}_{Pd}$$ M Pd ) derived from $${P}_{d}$$ P d using the closest 20 stations has a standard deviation of 0.4 between the estimated $${M}_{Pd}$$ M Pd and $${M}_{w}$$ M w . This suggests that CAA is a better magnitude determination parameter for the EEW system than $${P}_{d}$$ P d . |
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| ISSN: | 2196-4092 |