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  • November 4, 2019

[Frontier Letter] 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

The 2018 Hokkaido Eastern Iburi Earthquake (M=6.7) occurred at a very deep depth (~37 km) beneath the foreland fold-and-thrust belt of the Hidaka Collision Zone, Hokkaido, Japan. From the previously acquired controlled source seismic data, Iwasaki et al. (2019) revealed the detailed structure beneath this fold-and-thrust belt and its relationship with the aftershock activity of this earthquake. Relocated aftershocks are at depths of 7-45 km with steep geometry, extending to… Read more

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