Fig. 6.From: Switching from seismic to seismo-acoustic harmonic tremor at a transition of eruptive activity during the Shinmoe-dake 2011 eruptionAerial photos of the lava cake provided by Japan Meteorology Agency (a), The Yomiuri Shimbun (b), (c), and Asia Air Survey Co. Ltd. (d). These photos show that the lava surface was flattened between January 31 (b) and February 1 (c). The arrows indicate the direction of the view from the camera (Cam.) in Fig. 1.Back to article page