Fig. 5
From: Unusual low-angle normal fault earthquakes after the 2011 Tohoku-oki megathrust earthquake
Spatial distribution and magnitude-time plot of low-angle normal fault earthquakes. a Stars denote the epicenters of earthquakes, whose locations are derived from the JMA unified hypocenter catalog. Red stars indicate the low-angle normal fault earthquakes resembling the 2014 Fukushima-oki earthquake, and small blank stars represent the other normal fault earthquakes. Focal mechanisms were determined by the GCMT project. The size of stars and focal mechanisms are proportional to the magnitude. The centroid depth of the GCMT solution together with the earthquake occurrence date is specified for Earth event. The hypocenter depth of the 2011 low-angle normal fault aftershock determined by Yagi and Fukahata (2011) is also shown. In general, the GCMT solution has poor depth resolution. The iso-depth contours of the subducting plate interface are drawn every 10 km. b Red stars indicate the low-angle normal fault earthquakes resembling the 2014 Fukushima-oki earthquake, and blank stars represent the other normal fault earthquakes. The moment magnitude of each event was determined by the GCMT project. The figure was generated with Generic Mapping Tools (Wessel and Smith 1998)