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Satellite image of Tungurahua volcano by (c) Google Earth View
Satellite image of Tungurahua volcano by (c) Google Earth View
Tungurahua vulkaan
Stratovulkaan 5023 m (16,479 ft)
Ecuador, -1.47°S / -78.44°W
Current status: normal or dormant (1 out of 5)
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Tungurahua vulkaanuitbarstingen:
1534, 1557, 1640(?), 1641, 1644(?), 1646(?), 1757(?), 1773, 1776, 1777(?), 1781(?), 1857, 1885(?), 1886-88, 1900(?), 1916-25, 1944, 2000 - 2016, 2017 (?)
Typical eruption style:
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Tungurahua volcano news & eruption updates:

Tungurahua volcano (Ecuador) activity update: strombolian activity, ash emissions

Sunday Jul 21, 2013 01:44 AM | DOOR: T

Current seismic recording at Tungurahua (RETU station, IGPEN)
Current seismic recording at Tungurahua (RETU station, IGPEN)
Activity both at the surface and internal remains at moderately high levels. Since the large vent-clearing vulcanian explosion on 14 July, the volcano has been producing strong strombolian activity and near-continuous ash emissions.
This is accompanied by numerous long-period (LP) earthquakes and an elevated output of SO2 (3000 tonnes per day), as well as inflation at the northern flank in combination with weaker deflation of an area SW of the volcano (where the source of the magma might be located at about 2 km depth).
On the night of 18 July, incandescence was seen at the crater and incandescent blocks were ejected and rolled down the flank for about 500 meters.
Ashfall was reported in the Choglontus sector, with the ash being dark gray to black in color, which is indicative of juvenile (fresh, from new magma) ash.
Loud gunfire explosion sounds and rockfalls can be heard from the Runtún area. During windows of clear weather, an eruption plume of about 1000 m height could be seen above the volcano, drifting SW.
The observed activity indicates the presence of a new magma body in the upper conduit which feeds the present activity. It is likely that this will continue in the short term, with a possibility to increase if new magma is being ejected at depth. IGEPN assumes the most likely scenario is a continuation of moderate strombolian activity with moderate explosions ejecting varying amounts of ash and blocks that could affect the populations located in the vicinity of the volcano, in the direction of the prevailing winds. It seems less likely on the other hand, that the current eruption evolves into a more violent activity, which would require more magma input from a deeper source.
However, as happened in the past, the possibility of pyroclastic flows (but likely smaller than those from 14 July) cannot be rules out, and these could threaten areas on the lower slopes where farming activities are being conducted.
Another significant hazard are mud flows (lahars) that can be caused by mixing rain water with loose ash and block deposits. Areas particular at risk include stream valleys near Banos, Penipe and the sectors of the Pampa and Vascún.
Koppelingen / Bronnen:
  • Actividad estromboliana del volcán Tungurahua (IGPEN)
Vorig nieuws
Last night's seismic signal from Tungurahua (RETU station, IGPEN)
Friday, Jul 19, 2013
After the strong vulcanian explosion on 14 July, the volcano calmed down first, but resumed activity on 16 July which has been characterized by ash venting and small to moderate explosions and is continuing. ... [meer...]

Monday, Jul 15, 2013
A large explosive eruption occurred Sunday (14 July) morning, producing a large ash plume that could be seen from Quito (135 km away) and pyroclastic flows. According to Washington VAAC, the ash reached altitudes of 45,000 ft (13 km). The eruption followed a fast build-up of seismic activity, and likely corresponds to a vulcanian-type explosion, where pressure builds up to eject a solid plug that has tapped the vent. Elevated seismic activity had been noted in phases at the volcano during the previous weeks and while not completely unexpected as a potential scenario, the strength of the explosion was a surprise. ... [meer...]
Sunday, Jun 30, 2013
IGPEN reports an increase of seismic activity over the past days which might herald a new phase of activity in the near future. ... [meer...]
Saturday, May 25, 2013
Activity continues to be very low (steaming / degassing). [meer...]
Current seismic recording at Tungurahua (RETU station, IGPEN)
Thursday, May 16, 2013
The volcano has calmed down a bit compared to the previous week, which is also apparent on recent seismograms. No recent explosions or ash falls were reported. [meer...]

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