The third explosive eruption of Calbuco on 30/04/2015 - photo Mario Ruiz / EPA
After a few days more peaceful and of small plumes of gas and ash, Calbuco had its third significant explosive eruption on 30/04/2015 at 1:08 p.m. local (4:08 p.m. GMT), preceded 10-15 minutes before by a peak of tremor. The eruption was weaker than the previous two, but still accompanied with a gray ash plume loaded 3-5000 meters high, dispersing to the southeast.
Possible pyroclastic flows are causing small lahars in the Rio Blanco south. The pyroclastic material accumulated on the upper parts of the volcano could be remobilized by rain and give rise to secondary lahars.
The ash plume of Calbuco and Puerto Montt - photo Francesco Negroni / AP 30/04/2015
Calbuco : the ash cloud on Cochamó 04/30/2015 - photo Meteorologica / Twitter
NASA has provided a compilation of data about sulfur dioxide emitted between 23 and 29 April, translated by a picture showing the drift of the gas plume towards the northeast and east.
Eruption of Calbuco - Doc. compilation of sulfur dioxide AIRS data from April 23-29, 2015, showing the Calbuco plume spreading eastward. NASA
Sources :
- SERNAGEOMIN - rapport du 30.04.2015
- Nasa doc. AIRS dispersion du SO2
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