Fig. 5.From: Switching from seismic to seismo-acoustic harmonic tremor at a transition of eruptive activity during the Shinmoe-dake 2011 eruptionThe beginning of the SAHT event 14 minutes after a big explosion on February 1, 2011 is shown in the same format as Fig. 3. It started with an explosion (down arrows) and then shifted to periodic oscillation.Back to article page