Table 8 Slip tendency (ST) determined using stress field parameters estimated by the slip instability method
From: Stress field in northeastern Japan and its relationship with faults of recent earthquakes
Events | Fault model | Dip direction | Stress field | \(Ts\) best | \(Ts\) error |
|---|---|---|---|---|---|
Northern Miyagi earthquake mainshock | F-net | East | 11–Area All–I | 0.876 | 0.876 < \(Ts\)  < 0.876 |
West | 1997–2011 | 0.834 | 0.834 < \(Ts\)  < 0.835 | ||
East | 11–Area All–II | 0.759 | 0.745 < \(Ts\)  < 0.806 | ||
West | 2011–2019 | 0.316 | 0. 272 < \(Ts\)  < 0.427 | ||
East | 11–Area All–III | 0.939 | 0.939 < \(Ts\)  < 0.939 | ||
West | 1997–2019 | 0.756 | 0.755 < \(Ts\)  < 0.756 | ||
East | 11–South | 0.977 | 0.977 < \(Ts\)  < 0.977 | ||
West | 1997–2011 | 0.677 | 0.677 < \(Ts\)  < 0.679 | ||
Largest foreshock | F-net | East | 11–Middle 1997–2011 | 0.894 | 0.894 < \(Ts\)  < 0.895 |
West | 0.777 | 0.767 < \(Ts\)  < 0.799 | |||
Largest aftershock | F-net | East | 11–North 1997–2011 | 0.489 | 0.457 < \(Ts\)  < 0.500 |
West | 0.984 | 0.983 < \(Ts\)  < 0.987 | |||
Oshika peninsula earthquake | F-net | SE | 8–F + P | 0.946 | 0.945 < \(Ts\)  < 0.950 |
NE | (F-net and P-wave polarity) | 0.753 | 0.752 < \(Ts\)  < 0.758 | ||
SE | 8–P | 0.709 | 0.653 < \(Ts\)  < 0.814 | ||
NE | (P-wave polarity) | 0.639 | 0.624 < \(Ts\)  < 0.664 |