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Miravalles volcano

Stratovolcano 2028 m / 6,653 ft
Costa Rica, 10.75°N / -85.15°W
Current status: normal or dormant (1 out of 5) | Reports
Miravalles volcano books
Typical eruption style: sin especificar
Erupciones del volcán Miravalles: 1946 
Fecha / HoraRevista / ProfundidadDistanciaUbicación
Wed, 15 May 2019
Wed, 15 May 08:35 UTCM 2.6 / 6 km7 km2 km al Noreste de Rio Naranjo, Bagaces. (Costa Rica)
Sun, 12 May 2019
Sun, 12 May 11:50 UTCM 3.6 / 10 km25 km4 km al Este de Liberia, Guanacaste. (Costa Rica)
Wed, 24 Apr 2019
Wed, 24 Apr 22:56 UTCM 2.9 / 59 km37 km14 km al Oeste de Canas, Guanacaste. (Costa Rica)
Wed, 10 Apr 2019
Wed, 10 Apr 18:16 UTCM 3.2 / 12 km11 km10 km al Oeste de Cote, Guatuso. (Costa Rica)
Wed, 10 Apr 07:55 UTCM 1.7 / 5 km12 km9 km al Oeste de Cote, Guatuso. (Costa Rica)
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Background:

Miravalles is a 2028-m-high andesitic stratovolcano that is one of five post-caldera cones along a NE-trending line within the broad 15 x 20 km Guayabo (Miravalles) caldera. The caldera was formed during several major explosive eruptions that produced voluminous dacitic-rhyolitic pyroclastic flows between about 1.5 and 0.6 million years ago. Growth of post-caldera volcanoes in the eastern part of the caldera that overtopped much of the eastern and southern caldera rims was interrupted by edifice collapse that produced a major debris avalanche to the SW. Morphologically youthful lava flows cover the western and SW flanks of the post-caldera Miravalles complex, which rises above the town of Guayabo on the flat western caldera floor. The only reported historical eruptive activity was a small steam explosion on the SW flank in 1946. High heat flow remains, and Miravalles is the site of the largest developed geothermal field in Costa Rica.
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Smithsonian / GVP volcano information


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