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Fig. 1 | Earth, Planets and Space

Fig. 1

From: Long-term slow slip events along the Nankai trough delayed by the 2016 Kumamoto earthquake, Japan

Fig. 1

a Tectonic setting in Japan. Four plates around Japan are converging. b Enlarged map of the rectangular area in a. Broken contours show iso-depth contours of the plate interface between the subducting Philippine Sea plate and overriding Amur plate. The contour interval is 20 km. Red dots indicate the epicenters of low-frequency earthquakes. Blue ellipses schematically indicate long-term slow slip events along the Shikoku and Kyushu coasts. (1) Western Shikoku SSE. (2) Bungo SSE. (3) Northern Hyuga-nada Sea SSE. (4) Southern Hyuga-nada Sea SSE. The focal solution shows the mechanism of the 2019 Hyuga-nada Sea earthquake with Mw 6.2. The blue broken line indicates the area of the plate interface adopted in the time-dependent inversion. Blue circles show the locations of the GNSS sites used in the time-dependent inversion. The red broken line shows the expected source region of the next Nankai earthquake (Central Disaster Council of the Japanese Government 2013)

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