Turrialba volcano

Stratovolcano 3340 m (10,958 ft)
Costa Rica, 10.03°N / -83.77°W
Current status: normal or dormant (1 out of 5)
Last update: 16 Mar 2021 (low-level eruptive activity continues)
Turrialba volcano seen from Irazu
Turrialba volcano seen from Irazu

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.

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Typical eruption style: Explosive.
Turrialba volcano eruptions: 1723(?), 1847(?), 1853, 1855, 1861(?), 1864-65, 1866, 2010 (Jan 4) - ongoing

Latest nearby earthquakes

TimeMag. / DepthDistance/Location
Mon, 14 Jun 2021 (GMT) (1 earthquake)
13 de junio del 2021 11:34 pm (14 Jun 2021 05:34:00 GMT)
2.8

74 km
39 km (24 mi)
2.7 km west of San Jose, San José, Costa Rica
Fri, 11 Jun 2021 (GMT) (2 earthquakes)
11 de junio del 2021 4:14 pm (11 Jun 2021 22:14:00 GMT)
3.1

23 km
35 km (22 mi)
Tibas, 3.9 km north of San Jose, San José, Costa Rica
11 de junio del 2021 4:09 pm (11 Jun 2021 22:09:00 GMT)
2.6

9 km
34 km (21 mi)
Desamparados, 5.2 km southeast of San Jose, San José, Costa Rica
Thu, 10 Jun 2021 (GMT) (2 earthquakes)
10 de junio del 2021 3:45 am (10 Jun 2021 09:45:00 GMT)
3.1

1 km
19 km (12 mi)
Pococi, Provincia de Limon, 30 km northeast of San Jose, San José, Costa Rica
09 de junio del 2021 11:51 pm (10 Jun 2021 05:51:00 GMT)
2.7

4 km
19 km (12 mi)
Moravia, 24 km northeast of San Jose, San José, Costa Rica

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.


See also: Sentinel hub | Landsat 8
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