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Table 2 Polynomial fitting to the stress ratio R

From: Focal mechanisms and the stress field in the aftershock area of the 2018 Hokkaido Eastern Iburi earthquake (MJMA = 6.7)

m a0 a1 a2 a3 AIC
0 6.00 × 10–1     2.613
1 9.18 × 10–1 −9.87 × 10–3    −0.402
2 5.12 × 10–1 1.89 × 10–2 −4.66 × 10–4   −2.651
3 7.93 × 10–3 7.28 × 10–2 −2.26 × 10–3 1.88 × 10–5 0.933