Seismic records are for the vertical component. An impulsive infrasonic signal was excited at the time of the earthquake occurrence. Closed circles indicate those of infrasonic pulses that were associated with low frequency earthquakes. Those with crosses were followed by small avalanches. Crosses are for those associated with dome collapses.
Arrows indicate the direction of pyroclastic flows which followed the dome collapses.
Areas that are enclosed by solid and dashed lines are the locations of new lava lobes that were emerging and have emerged, respectively.