Fig. 2.
From: Earthquake forecast models for inland Japan based on the G-R law and the modified G-R law
(a) Calculation grids that covers Japan with spacing of 0.1°. Circle and shaded rectangle in inset map A indicate examples of a region for calculating model parameters and a forecast area, respectively. Shaded area near Miyake Island (labeled in Fig. 2(c)) in inset map B indicates the region excluded from the estimate of the nationwide mean b-value for tectonic reasons. (b) Epicenters of earthquakes used to make models. (c) Epicenters of target earthquakes with M ≥ 5.0. Different symbols correspond to different periods. Prefecture abbreviations: Iw, Iwate; Mi, Miyagi; Ni, Niigata; To, Tochigi; Gu, Gunma; Na, Nagano; Gi, Gifu; Tt, Tottori. White arrows indicate relative movements of the oceanic plates against the land plate.