Fig. 2From: Evaluation for hypocenter estimation error in the southwestern Kuril trench using Japan and Russia joint seismic dataSimulated hypocenter determination using synthetic travel time data. The given hypocenters at each grid are shown by open stars. a Calculated hypocenters for given shallow (10 km depth) earthquakes using the Japan network only. b Same as a but using the Japan–Russia joint network data. The 90 travel times and hypocenters were produced from one given virtual hypocenterBack to article page