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Fig. 1 | Earth, Planets and Space

Fig. 1

From: Temporal variation in source location of continuous tremors before ash–gas emissions in January 2014 at Aso volcano, Japan

Fig. 1

Observation sites at Aso volcano, Japan. a Map of Aso volcano (Aso caldera) in Japan. b Five seismic stations around the active Nakadake crater of Aso volcano. Solid and open circles represent short-period and broadband seismometers, respectively. c Enlarged view around the active crater. The two black squares with fields-of-view indicate locations at which the photographs in Fig. 2 were taken

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