Official Journal of the Asia Oceania Geosciences Society (AOGS)
Table 1 The values of constants in Eqs. (2) and (3) and the relation between \({M}_{CAA}\) and actual \({M}_{w}\), \({M}_{pd},\) and actual \({M}_{w}\) for different time windows using 20 stations
From: Magnitude determination using cumulative absolute absement for earthquake early warning
Parameter | Window(s) | Stations | a | b | c | SDE | Magnitude |
|---|---|---|---|---|---|---|---|
\({P}_{d}\) | 1 | 20 | −1.620 | 0.637 | −2.573 | 0.477 | \({M}_{w}\)=\({M}_{pd}\) ± 0.40 |
2 | −1.687 | 0.584 | −1.898 | 0.437 | \({M}_{w}\)=\({M}_{pd}\) ± 0.42 | ||
3 | −1.749 | 0.603 | −1.780 | 0.413 | \({M}_{w}\)=\({M}_{pd}\) ± 0.43 | ||
4 | −1.807 | 0.635 | −1.771 | 0.391 | \({M}_{w}\)=\({M}_{pd}\) ± 0.42 | ||
5 | −1.901 | 0.682 | −1.820 | 0.368 | \({M}_{w}\)=\({M}_{pd}\) ± 0.37 | ||
CAA | 1 | 20 | −1.995 | 0.761 | −2.408 | 0.407 | \({M}_{w}\)=\({M}_{CAA}\) ± 0.31 |
2 | −2.059 | 0.778 | −2.057 | 0.389 | \({M}_{w}\)=\({M}_{CAA}\) ± 0.31 | ||
3 | −2.132 | 0.773 | −1.658 | 0.373 | \({M}_{w}\)=\({M}_{CAA}\) ± 0.34 | ||
4 | −2.181 | 0.764 | −1.326 | 0.360 | \({M}_{w}\)=\({M}_{CAA}\) ± 0.34 | ||
5 | −2.227 | 0.756 | −1.049 | 0.342 | \({M}_{w}\)=\({M}_{CAA}\) ± 0.33 |