Fig. 4From: Characteristics of the foreshock occurrence for Mj3.0 to 7.2 shallow onshore earthquakes in Japana The distribution of 195,158 earthquakes in the declustered earthquake catalogue. b The distribution of mainshock focal mechanisms (F-net) used in this study. Red balls are normal faultings, blue balls are strike-slip faultings and yellow balls are reverse faultingsBack to article page