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Earth, Planets and Space
Fig. 9 | Earth, Planets and Space

Fig. 9

From: Structural heterogeneity in and around the fold-and-thrust belt of the Hidaka Collision zone, Hokkaido, Japan and its relationship to the aftershock activity of the 2018 Hokkaido Eastern Iburi Earthquake

Fig. 9

Test determination of hypocenters using 1D models. a 1D velocity models used for test hypocenter determination. Model 1 is a model from the average over the 3D velocity model by Matsubara et al. (2017a, b). Model 2 is constructed from our structure model in Fig. 5(a). b Comparison of epicenters from Model 1 and 2. c Comparison of hypocenters from Model 1 and 2 in a cross section with respect to X–X’ in b

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