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Earth, Planets and Space
Fig. 1 | Earth, Planets and Space

Fig. 1

From: Dip distribution of Oita–Kumamoto Tectonic Line located in central Kyushu, Japan, estimated by eigenvectors of gravity gradient tensor

Fig. 1

Location map of study area. The black dashed line is the Oita–Kumamoto Tectonic Line, and the blue line is the Median Tectonic Line (MTL), which is the largest tectonic line with a right-lateral fault component in south-western Japan. The light grey area with blue dashed line indicates the Hohi volcanic zone (Kamata 1989). The area between ochreous lines is the Beppu–Shimabara Graben (Matsumoto 1979). Red lines indicate the calderas; green lines are active faults (e.g. Research Group for Active Faults 1991), and red stars indicate epicentres of which the magnitude was more than 5 in earthquakes occurring between 14 April and 19 April 2016

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