Tungurahua volcano news & eruption updates:
Tungurahua volcano (Ecuador): new phase of activity, warning of possible explosion
Wednesday Mar 04, 2015 16:07 PM | BY: T
Steam plume from Tungurahua volcanoA new phase of activity has started at the volcano. So far, surface activity has been low, with minor explosions and steaming, but it is likely that this activity will increase in the near future.
Since 17 Feb, a gradual increase in seismic activity has been recorded, including the appearance of frequent volcano-tectonic earthquakes since 21 Feb, which reflect rock fracturing, likely caused by pressurized magma intruding into the plumbing system.
A small explosion was reported on 18 Feb, and SO2 emissions, also tell tale of fresh magma approaching the surface, were detected. Moderate inflation at the summit was measured as well.
According to the Geophysical Institute (IGEPN), the following scenarios are most likely for the short-term future:
Scenario 1 (most likely): An important initial (vent-clearing) explosion with the emission of high ash plumes, and the occurrence of pyroclastic flows. During the following weeks, more explosions aat varying sizes would then follow as magma continues to arrive at the crater. This scenario is similar to the eruption of February 2014.
Scenario 2 (less likely): a period of eruptive activity begins gradually with the occurrence of sporadic explosions that increase their frequency and size. Pyroclastic flows are unlikely. This scenario is similar to rashes March 2013.
Links / Sources:
Links / Sources:
Thursday, Sep 25, 2014
Activity at the volcano remains at moderate to high levels, consisting of strombolian and small vulcanian explosions. During the past week, ash plumes have been rising 2-3 km above the volcano.+ ... [more]
Sunday, Aug 31, 2014
A series of small pyroclastic flows occurred yesterday evening, IGEPN reported in its latest special bulletin. ... [more]
Sunday, Aug 24, 2014
Intermittent explosive activity of moderate size continues at the volcano. An ash emission to flight level 280, i.e. 28,000 ft (8 km) altitude and drifting west was reported today. [more]
Tungurahua volcano (Ecuador) activity update: moderate to strong strombolian explosions from central crater
Tuesday, Aug 19, 2014
The volcano's activity remains moderate with frequent small to medium sized strombolian- to vulcanian-type explosions. ... [more]
Monday, Aug 04, 2014
Activity continued to increase at the volcano as new magma continues to arrive at its summit. Since the first ash emission a week ago, more and stronger explosions, as well as phases of continuous ash and gas emissions and milder strombolian activity have occurred. ... [more]