Towards 19.00 (Local Time, on 02/10) was clearly observed brightness in the crater of Cotopaxi volcano. This type of activity indicates the progressive realization of the scenario described in the report of upgrading No. 18. This brightness is due to high temperature of magma gases. This could be a premonition of a new eruptive phase characterized by low to moderate explosions that could eject incandescent blocks from the crater, this limited to areas near. This activity could also be the beginning of new emissions and ash fall. With this type and this level of activity, it can not produce large lahars or even moderate size.
On September 29, with the logistical support of an aircraft MICS, a survey was held from the Tababela airport to the Cotopaxi volcano in a Twin Otter FAE (452).
it was confirmed that it was observed on previous occasions, the presence of water and humidity in the ice in contact with the ground surface, where jets of water are formed, which run on the side, for the drains of the summit of the volcano. Previous reports have also mentioned that the thaw could eventually generate small secondary lahars. Again it was observed that several terminal glaciers tongues have transverse cracks and a glacial advance, probably due to the melting of the ice.
The good weather helped to make the most of temperature measurements of thermal anomalies identified on the volcano. Most recorded, it was possible to observe changes in the inner crater where a vent which has several hundred meters down from the peak, and the base could not be estimated because of its large depth, was clearly identified. He was taken maximum apparent temperature measurements (TMA) of the inner crater and pulsed emissions observed during the flight. The highest values of the TMA corresponded to the top of the gas emission and the value was 157.7 ° C. The measured value is smaller than the 3 September, where a value had been obtained, at 200, 3 ° C.
October 05, 2015 . Cotopaxi, Equateur :
Source : IGEPN
Photos : Jean-Luc le Pennec.