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Fig. 1 | Earth, Planets and Space

Fig. 1

From: Seismic potential around the 2018 Hokkaido Eastern Iburi earthquake assessed considering the viscoelastic relaxation

Fig. 1

Map of the Iburi earthquake and the three target faults in the present study, shown with the geological map (see details in GeomapNavi; https://gbank.gsj.jp/geonavi/geonavi.php). The black, blue, and green rectangles indicate the surface projection for the geometry of the three target faults: the northern fault, the southern fault in the Ishikari fault zone, and the SI fault, respectively. The star and gray circles indicate the hypocenter of the mainshock and the 40-day aftershocks based on the earthquake catalog of Japan Meteorological Agency. The “beach ball” represents the centroid moment tensor solution for the mainshock by Japan Meteorological Agency (https://www.data.jma.go.jp/svd/eqev/data/mech/cmt/fig/cmt20180906030759.html. Accessed: January 29, 2019). The red rectangle shows the surface projection of the Iburi earthquake fault estimated by Japan Meteorological Agency (2018). The original fault slip distribution and the modified distribution used in the present study are shown on the left and right of the right lower panel. Red lines indicate active faults after Research Group for Active Faults of Japan (1991). The small green squares represent seismic stations used for analysis. The location of Hidaka Mountains is also indicated. The bottom panel shows the target faults, the mainshock, and the aftershocks projected onto the E–W vertical section

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