Table 6 Estimated aftershock durations
Mainshock | \({M}_{\mathrm{min}}\) | 2-year Background (per day) | k value | p value | c value | \({t}_{d}\) (year) |
|---|---|---|---|---|---|---|
1992 \({M}_{w}\) 7.3 Landers Eq | 3.5 | 0.112 | 80.5 | 1.12 | 1.2 | ~ 0.96 |
4.0 | 0.032 | 15 | 0.98 | 0.9 | ~ 1.5 | |
5.0 | 0.0014 | 12 | 1.04 | 5 | ~ 16.4 | |
1993 \({M}_{w}\) 7.8 Hokkaido–Nansei–Oki Eq | 3.5 | 0.018 | 274.4 | 1.27 | 0.01 | ~ 5.5 |
4.0 | 0.004 | 80.7 | 1.32 | 0.01 | ~ 4.9 | |
5.0 | 0.001 | 10 | 1.283 | 0.226 | ~ 3.6 | |
1994 \({M}_{w}\) 7.7 Sanriku–Oki Eq | 3.5 | 0.293 | 68.5 | 0.83 | 0.01 | ~ 1.9 |
4.0 | 0.138 | 38.7 | 0.89 | 0.01 | ~ 1.5 | |
5.0 | 0.022 | 10 | 0.99 | 0.01 | ~ 1.2 | |
1999 \({M}_{w}\) 7.4 Izmit Eq | 3.5 | 0.007 | 107.3 | 1.26 | 5 | ~ 6 |
4.5 | 0.007 | 17.9 | 1.13 | 0.01 | ~ 2.7 | |
5.0 | 0.007 | 12 | 1.18 | 5 | ~ 1.5 | |
2010 \({M}_{w}\) 7.2 Darfield Eq | 3.5 | 0.3 | 95.7 | 1.01 | 0.55 | ~ 3.5 |
4.0 | 0.3 | 17 | 0.95 | 0.01 | ~ 0.2 | |
5.0 | 0.3 | 10 | 0.82 | 5 | ~ 0.12 |