Fig. 3
From: Aftershocks following the 2011 Tohoku-Oki earthquake driven by both stress transfer and afterslip
Spatiotemporal distributions of the number of background earthquakes calculated using the estimated HIST-ETAS model. a–j Spatial distributions of the number of background earthquakes by year. The black dashed line denotes the Japan Trench axis. The blue solid line denotes the outer edge of the large coseismic slip zone of the 2011 Tohoku-Oki earthquake, as proposed by Kato and Igarashi (2012)