Cotopaxi volcano news & activity updates:
Cotopaxi volcano (Ecuador): increased seismic activity, volcanic unrest
Wednesday Jun 03, 2015 06:05 AM | BY: T
Seismic activity at Cotopaxi over the past 20 years (IGPEN)
SO2 emissions at Cotopaxi (IGPEN)
The volcano has been showing signs of unrest. Since mid-April this year, and particularly during May, a marked increased in earthquakes and SO2 emissions have been detected, which could be signs of a magma intrusion beneath the volcano.
Long-period earthquakes at Cotopaxi (IGPEN)
During May, about 3000 local earthquakes were recorded, a significant increased compared to April (628 quakes), and more than during the last seismic crisis in 2001-02.
In particular, long-period earthquakes related to internal fluid movements have shown an increase in May. Most quakes were located in areas north and northeast of the volcano's summit, at two depth layers, one at shallow 3 km and others at deeper depths of up to 14 km.
In addition, SO2 emissions have shown an increased from normal values of approx. 500 tons / day to 2500-3000 tons per day. At the crater, fumarolic activity has increased during May. During the weekend of 22 and 23 May, sulfur smell the upper northern flank was very intense.
Very slight deformation has occurred on the N and NE flanks, suggesting a trend towards inflation, IGPEN reported.
For now, the signs of volcanic unrest are small and there is no indication that a new eruption is imminent, but the current unrest could be a medium to long term precursor to a possible new eruption, which would be the first since 1942.
Links / Sources:
Links / Sources:
Saturday, Oct 05, 2013
IGPEN surveyed the volcano on 20 Sep. Maximum temperatures in the active crater were found at 55.7 °C and no unusual signs of activity or significant morphological changes compared to recent years were observed. [more]
Monday, Jan 28, 2013
What seems to be a strong seismic swarm has been visible on recent seismograms, but IGPEN has not issued any notes about this otherwise interesting activity, it is suspected that the VC1 station at the NE base of the volcano is either malfunctioning, showing something else or simply having a very strong magnification of normal backgroud seismicity. [more]
Wednesday, Jan 23, 2013
Another pulse of volcanic earthquakes is in progress under Cotopaxi volcano. Such swarms have been occurring several times recently, but for now, can be considered as part of the normal behavior of an active, but currently dormant volcano. [more]