Fig. 1.

Hypocenters of inland earthquakes that occurred in NE Japan based on the Japan Meteorological Agency (JMA) catalog. Inland earthquakes before, and after, the 2011 Tohoku Earthquake are shown by gray and black circles, respectively. A star denotes the earthquakes whose magnitudes are greater than 5. The color of the large circle denotes the amount of the Coulomb stress change caused by the 2011 M 9 earthquake for each fault assumed in this study. The focal mechanisms with the plausible fault plane defined by the bold great circle are also shown. The area of Fig. 4 is outlined by a rectangle with broken line. The insert map shows the slip distribution by Hayes with a contour interval of 10 m.