Fig. 10
Comparison between spatial distributions of seismicity parameters and the slow earthquake distribution in the Japan Trench. a Gutenberg–Richter relationship’s b value (Tormann et al. 2015). The b values were estimated from January 1, 2004, to March 11, 2011. In gray areas, Tormann et al. (2015) did not estimate b values because the magnitude–frequency distributions of the areas were not well described by the Gutenberg–Richter relationship. b Tidal response of seismicity (Tanaka 2012). p values of Schuster’s test during the 3000 days prior to the Tohoku-Oki earthquake are shown. A low p value indicates a high tidal response. The p values were calculated for seismicity in spatial windows of 200 km × 200 km, whose centers correspond with the centers of the squares of 50 km × 50 km in the figure (the black squares). c p value of the Omori–Utsu’s aftershock law (Ogata 2011). The p values were estimated using Mj 5 or greater earthquakes from 1926 to 2008. Note that the slow and fast earthquakes are colored gray in (c). For an explanation of the symbols, refer to the legend in the figure. The slow earthquakes, megathrust earthquakes, and small repeating earthquakes are from Fig. 9