Fig. 4From: Prediction and validation of short-to-long-term earthquake probabilities in inland Japan using the hierarchical space–time ETAS and space–time Poisson process modelsa Blue circles represent shallow earthquakes of M ≥ 6 that occurred during the period 1996–2019 and the color image with contours represents the μ value distribution of the HIST–ETAS–5pa model for the period 1926–1995. b Blue and red circles show the locations of historical damaging earthquakes before and after 1585, respectively. The horizontal dotted line indicates 38°N. The color image with contours represents the μ value distribution of the HIST–ETAS–5pa model for the period 1926–2018. The color scale for both (a) and (b) are the same as in Fig. 3 and Additional file 1: S4Back to article page