Fig. 15
From: Heat flow data and thermal structure in northeastern Japan
The depth of the 300 ℃, 400 ℃, and 450 ℃ (Model C). The depth values reaching each temperature obtained at each measurement point are interpolated by averaging filtering based on the nearest neighbor method. The grid size was set to 4 min, and the search area to 50 km. Based on the values of this grid, isobaths were described at 2.5 km intervals