Fig. 20From: 3-D inversion of magnetic data based on the L1–L2 norm regularizationA simplified geological map of the northern part of Hokkaido Island, Japan. A simplified geological map of the northern part of Hokkaido Island, Japan (Original map is Seamless Digital Geological Map of Japan of GSI: https://gbank.gsj.jp/seamless). The left and lower coordinates of these maps are WGS84 (degree), and right and top coordinates are UTM (km)Back to article page