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

Fig. 1

From: Volcanic magma reservoir imaged as a low-density body beneath Aso volcano that terminated the 2016 Kumamoto earthquake rupture

Fig. 1

Epicenter and aftershocks of the 2016 Kumamoto earthquake and Bouguer anomaly of the study area. a Epicenter and aftershocks of the 2016 Kumamoto earthquake as determined by the Japan Meteorological Agency (JMA). The white star indicates the epicenter of the main shock. Also shown are aftershocks that occurred in the first 3 days after the mainshock (red circles). Solid black rectangles (Faults A and B) indicate surface projections of fault geometries determined by Yagi et al. (2016) and Geospatial Information Authority of Japan (2016b), respectively (Table 1). b Topography of the study area. Red circles and solid black rectangles indicate aftershocks and fault geometries, respectively, as in (a). Diamonds indicate geothermal gradient (Tanaka et al. 2004). c Bouguer anomaly of the study area. The Bouguer anomaly is calculated with a reduced density of 2.3 g/cm3. White dots indicate the reference point used to calculate the Bouguer anomaly and for the gravity inversion (Fig. 2)

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