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Latest news from Turrialba volcano:

Saturday, Jul 22, 2017
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ... [more]
Friday, Jul 21, 2017
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ... [more]
 

Turrialba volcano

Stratovolcano 3340 m (10,958 ft)
Costa Rica, 10.03°N / -83.77°W
Current status: minor activity or eruption warning (3 out of 5)
Turrialba webcams / live data
Turrialba volcano books | Tours
Last update: 22 Jul 2017
Typical eruption style: Explosive.
Turrialba volcano eruptions: 1723(?), 1847(?), 1853, 1855, 1861(?), 1864-65, 1866, 2010 (Jan 4) - ongoing Turrialba volcano seen from Irazu
TimeMag. / DepthDistanceLocation
Fri, 21 Jul
Fri, 21 Jul 18:12 UTCM 3.0 / 2 km5 km4 km al Oeste de Pacayas, Alvarado.
Fri, 21 Jul 09:47 UTCM 2.5 / 6 km21 km3 km al Sureste de Tobosi, El Guarco.
Fri, 21 Jul 09:27 UTCM 2.5 / 8 km22 km2 km al Sureste de Tobosi, El Guarco.
Fri, 21 Jul 00:25 UTCM 2.5 / 6 km10 km2 km al Noreste de Capellades, Alvarado.
Thu, 20 Jul
Thu, 20 Jul 07:41 UTCM 2.9 / 13 km43 km13 km al Norte de Pacuarito, Siquirres.
View all recent quakes
Turrialba (3340 m) is the easternmost of Costa Rica's active volcanoes. It is a large stratovolcano with a complex of 3 summit craters and its flanks mostly covered by farmland and forest. vegetation. After its previous eruption in 1866, signs of unrest started in 2006 and new phreatic activity began on Jan 4, 2010.

Background:

Turrialba is the easternmost of Costa Rica's active volcanoes and a large vegetated basaltic-to-dacitic stratovolcano. It is located opposite Irazú volcano, both being separated by a broad saddle.
Together with Irazú, Turrialba is one of Costa Rica's largest volcanoes. During the past 3500 years in prehistoric times, it has had at least 5 larger explosive eruptions. The top of Turrialba has 3 craters at the upper SW end of a broad 800 x 2200 m wide summit depression breached to the NE.
Eruptions from Turrialba occurred mostly from the summit craters, although two flank cones are found on the SW flank. During the 19th century, a few eruptions occurred that produced pyroclastic flows. Since an eruption in 1866 and until 2006, Turrialba was quiescent, but showed strong fumarolic activity at the central craters.
Since 2006, increased fumarolic and seismic activity were noted. On Jan 4, 2010, two new vents that later merged into a fissure aligned along the tectonic trend of the summit area opened in its western crater and started to erupt large amounts of sulphur dioxide gas and occasional lithic ash. This phreatic activity was accompanied by strong tremors and continued for a few days, but declined since Jan 8. Ash fall in the surroundings of the volcano and acid rain caused damage to agriculture and prompted evacuation of about 30 inhabitants living in the immediate vicinity of the volcano.


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