Effusive eruption – April 2011
There are signs of a decrease in the eruption rate with a drop off in the number of rockfalls occurring.
This is the first clear decrease noted since the current episode commenced in January 2007. The number
of explosions is also decreasing. Quite what this means is difficult to forecast after such a sustained
period of fairly constant activity.
Effusive Eruption – February 2011
The months continue to advance with little change in the characteristics related to the effusive eruption of the volcano.
The dome remains the same size with all new lava forming on the western lobe. No significant volume of lava can sustain
itself for very long on this steep flank, which results in the frequent rockfalls. Current research includes an analysis
of the rockfall volumes using different techniques: quantifying the volume of dome lost, the thermal emissions from the
rockfall and the seismic signal.
The photo taken from a flight in February shows the grey western lobe, as well as a fresh explosion crater in the SE sector.