Magnitude determination using cumulative absolute absement for earthquake early warning
Journal
Geoscience Letters
Journal Volume
10
Journal Issue
1
Date Issued
2023-12-01
Author(s)
Abstract
The cumulative absolute absement (CAA) of the 3 s window after P-wave arrival can be used to estimate the magnitude (MCAA) 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 (MCAA) and the moment magnitude (Mw) is found to be 0.3 when using either 6 or 20 stations. This means that MCAA can be reliably predicted using the closest 6 stations. On the other hand, the magnitude (MPd) derived from Pd using the closest 20 stations has a standard deviation of 0.4 between the estimated MPd and Mw . This suggests that CAA is a better magnitude determination parameter for the EEW system than Pd .
Subjects
Early Warning | Earthquake | Magnitude | P-waves
SDGs
Type
journal article