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Sunday, Sep 09, 2012
Minor rockfalls were reported from Irazú´s main crater walls following the magnitude 7.6 earthquake on 5 Sep. ... read all
 

Irazu volcano

Stratovolcano 3432 m / 11,260 ft
Costa Rica, 9.98°N / -83.85°W
Current status: normal or dormant (1 out of 5)
Irazu webcams / live data | Reports
Irazu volcano books | Tours
Last update: 29 Feb 2020
Typical eruption style: Explosive.
Irazu volcano eruptions: 1726, 1775(?), 1821(?), 1822, 1823, 1826(?), 1842, 1844(?), 1847, 1864, 1875, 1882(?), 1909(?), 1914(?), 1917-21, 1924, 1928, 1930, 1933, 1939-40, 1963-65, 1977, 1994
TimeMag. / DepthDistanceLocation
Fri, 10 Jul 2020
Fri, 10 Jul 09:11 UTCM 2.3 / 16 km8 km0 km al Norte de Tierra Blanca, Cartago. (Costa Rica)
Thu, 2 Jul 2020
Thu, 2 Jul 10:33 UTCM 2.9 / 28 km19 km46 km al Suroeste de Bahia Ballena, Osa. (Costa Rica)
Thu, 2 Jul 05:47 UTCM 2.8 / 5 km2 km6 km al Noreste de Llano Grande, Cartago. (Costa Rica)
Wed, 24 Jun 2020
Wed, 24 Jun 18:20 UTCM 2.9 / 73 km25 km4 km al Norte de San Cristobal, Desamparados. (Costa Rica)
Tue, 23 Jun 2020
Tue, 23 Jun 08:30 UTCM 3.4 / 3 km16 km15 km al Suroeste de Guapiles, Pococi. (Costa Rica)
View all recent quakes
Irazú (3432 m) immediately east of the capital San José is Costa Rica's highest and one of its most active volcanoes. Tephra fall (ash) during the last major eruption of Irazú in 1963-65 caused heavy damage to infrastructure and life in San José and its surroundings.

Background:

Irazú is a massive stratovolcano covering more than 500 sq km with at least 10 flank cones on the southern flank, all being older than at least 14,000 years when a massive lava flow (the "Ceravantes" flow) was erupted.
All known eruptions from Irazú during the past 10,000 years have been explosive and originated from the summit craters that show a migration to the W over time. The historically active crater contains a small acid lake of changing size and color.
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Source: GVP, Smithsonian Institution

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