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Turrialba volcan
Stratovolcano 3340 m (10,958 ft)
Costa Rica, 10.03°N / -83.77°W
Condition actuelle: Activité petite ou avertissement éruption imminente (3 sur 5)
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Eruptions du volcan Turrialba:
1723(?), 1847(?), 1853, 1855, 1861(?), 1864-65, 1866, 2010 (Jan 4) - ongoing
Style éruptif tipique:
Explosive.
Derniers séismes proches
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Turrialba volcano (Costa Rica): activity updates and eruption news

Turrialba volcano (Costa Rica): ongoing ash emissions and elevated seismic activity

Saturday Nov 01, 2014 21:14 PM | IS
Costa Rica’s Turrialba Volcano erupts, as seen from 14,000 feet at 8:29 a.m. on Oct. 30, 2014. (OVSICORI-UNA, via The Tico Times)
Costa Rica’s Turrialba Volcano erupts, as seen from 14,000 feet at 8:29 a.m. on Oct. 30, 2014. (OVSICORI-UNA, via The Tico Times)
Image of Turrialba's crater taken on Thursday morning and tweeted by RTN News
Image of Turrialba's crater taken on Thursday morning and tweeted by RTN News
Image of Turrialba's crater taken on Thursday morning and tweeted by RTN News
Image of Turrialba's crater taken on Thursday morning and tweeted by RTN News
Image of Turrialba's crater taken on Thursday morning and tweeted by RTN News
Image of Turrialba's crater taken on Thursday morning and tweeted by RTN News
According to the National Seismological Network (RSN), the sudden eruption of Turrialba last Wednesday night was the volcano’s largest in 150 years. Costa Rica-based online-newspaper ‘The Tico Times’ reports that it was a massive phreatic explosion that spewed out ash, rocks and possibly magma. Experts from the University of Costa Rica (UCR) and National University (UNA) reported increased seismic activity on Wednesday afternoon, culminating in explosive activity at 11:10 p.m. with the ash cloud from the explosion reaching several hundred meters.

The eruption was followed by strong rumblings and ash covering roofs, gardens, roads and cars across different parts of central Costa Rica. The volcano is located merely 60 km northeast of the Costa Rican capital of San Jose but the area close to the volcano has been largely deserted since the renewal of volcanic activity in 2010. Upon the eruption, National Emergency Commission (CNE) officials along with UNA and UCR vulcanologists went to the area to conduct on-the-ground evaluations of the volcano’s activity. They reported that spewing of gas, vapour and ash is concentrated in two of the volcano’s craters and that activity remained constant on Thursday morning.

Thursday morning, CNE officials declared a Yellow Alert and closed the Turrialba Volcano National Park for visitors. 11 people were evacuated from surrounding areas but there are, at this time, no reports of injuries. Thursday afternoon they recommended that the Education Ministry suspend classes in five cantons in Cartago province as well as the closure of the Irazú Volcano National Park. Poás Volcano will also be closely monitored (www.ticotimes.net).

Torrialba volcano remained at elevated activity throughout Friday and continued to produce ash emissions and rumbling. Elevated seismic activity in the nearby area includes earthquakes up to magnitude 4.3, and some houses were reportedly damaged. Explosive activity will likely continue throughout the next few days with Costa Rica emergency services on alert (http://www.vulkane.net).
Actualités précédentes
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. ... lire toutes
Friday, May 30, 2014
SO2 plume over Central America (NOAA)
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. ... lire toutes
Wednesday, Jul 24, 2013
Yesterday's seismic signal from Turrialba (VTUC station, OVSICORI)
The seismic crisis continues with a swarm of volcanic-tectonic quakes as well as periods of low-frequency tremor and possible small explosion signals (which could suggest small phreatic eruptions). OVSICORI wrote that on 18 July, over 1000 earthquakes were recorded on a single day. ... lire toutes
Friday, Jul 19, 2013
Current seismic recording from Turrialba volcano (VTUC station, OVSICORI)
The seismic swarm continues but has decreased in strength during the past day. ... lire toutes
Monday, Jul 15, 2013
Current seismic recording from Turrialba volcano (VTUC station, OVSICORI)
A significant earthquake swarm has started late on 13 July at the volcano and is continuing. This could indicate a rise of magma in progress and eventually lead to new eruptions in the near future. ... lire toutes

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