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Turrialba volcano
Stratovolcano 3340 m (10,958 ft)
Costa Rica, 10.03°N / -83.77°W
Current status: restless (2 out of 5)
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Turrialba volcano eruptions:
1723(?), 1847(?), 1853, 1855, 1861(?), 1864-65, 1866, 2010 (Jan 4) - ongoing
Typical eruption style:
Explosive.
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Turrialba volcano (Costa Rica): activity updates and eruption news

Turrialba volcano (Costa Rica): strong ash eruptions

Friday Mar 13, 2015 17:37 PM | BY: T

Ash emission from Turrialba this morning (OVSICORI-UNA)
Ash emission from Turrialba this morning (OVSICORI-UNA)
Eruption at Turrialba yesterday (OVSICORI-UNA)
Eruption at Turrialba yesterday (OVSICORI-UNA)
The volcano started to erupt again yesterday and has been producing an ongoing series of vigorous ash eruptions. The new activity followed 4 calm days after a few much weaker eruptions took place on 8 March.
The first eruptions occurred yesterday starting around 11 am local time, producing plumes that rose 500 m and drifted west to cause ash falls in the capital San José.
A second pulse of activity occurred from 13:38 to 14:24, with ash plumes increasing to up to 1 km height. A part of the southern crater wall was breached by one of the stronger explosions, and a new fumarole field appeared in the breach.
A third pulse of explosions began at 14:54 and lasted until 15:24, again producing ash plumes of up to 1 km height. Abundant ash fall was reported from the Central Valley to the west. Ash fall was reported in up to 80 km distance in Orotina to the west.
The volcano calmed down yesterday afternoon, but started to erupt again early this morning around 04:30. At least 5 more explosions occurred, producing plumes that rose up to 1500 m above the crater.
Costa Rica's international airport of San Jose was closed yesterday due to ash fall. So far, there are no reports of evacuations, but Civil Protection is preparing to evacuate people living nearby areas if the eruption increases.

So far, it is unclear whether the eruptions are caused by new magma arriving in the upper conduit or are phreatic in origin.
Previous news
Monday, Mar 09, 2015
Small ash emissions were observed yesterday.A series of 4 small explosions occurred between 13:41 and 15:17 local time, generating plumes of up to 500 m height. ... [more]
Tuesday, Dec 09, 2014
A new eruption occurred last evening at 21:30 local time. Not much detail about the eruptions is available, but it seems to have been a rather small event. Light ash fall was noted in areas up to 20 km distance. There are no reports of damage or injuries. ... [more]
Sunday, Nov 16, 2014
Another ash eruption, but significantly smaller than the one from 29 Oct, occurred last Friday at 13:46 local time. ... [more]
Thursday, Oct 30, 2014
A relatively large explosion occurred at the volcano last night at 23:40 local time. According to local news, the eruption lasted about 45 minutes and was accompanied by strong seismic activity, which was felt by the local population. ... [more]
SO2 plume over Central America (NOAA)
Friday, May 30, 2014
The volcano could be becoming more active with increased degassing. An elevated SO2 concentration in the atmosphere above and near the volcano was visible on satellite data yesterday. Seismic activity appears to be elevated. [more]

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