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

Fig. 1

From: Rapid dike intrusion into Sakurajima volcano on August 15, 2015, as detected by multi-parameter ground deformation observations

Fig. 1

a Location of Sakurajima volcano and Aira caldera. The solid triangle represents the summit crater of Minami-dake; the dashed line represents the rim of the Aira caldera. b Magnification of box in (a). Solid squares represent the continuous global navigation satellite system (GNSS) stations of the Sakurajima Volcano Research Center (SVRC) of Kyoto University; open circles represent GEONET stations operated by the Geospatial Information Authority of Japan (GSI); open rhombuses represent the water-tube tiltmeters; open inverted triangles represent the borehole tiltmeter from the SVRC; solid inverted triangles represent the borehole tiltmeter from the Japan Meteorological Agency (JMA); open stars represent linear strainmeters; and solid triangles represent Kita-dake, Minami-dake and the Showa crater

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