Fig. 1From: Coseismic changes in groundwater level during the 2018 Hokkaido Eastern Iburi earthquakeLocations of the monitored observation wells (ABT, JNS, KTB, TKC, TSK, and YCG; solid circles) and the epicenter of the 2018 Hokkaido Eastern Iburi earthquake (solid star). Volumetric strain, indicated by contours extending from the epicenter, was calculated using the fault model of the earthquake (Geospatial Information Authority of Japan 2018). The gray area indicates tensile fieldBack to article page