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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: unspecified
Miravalles volcano eruptions: 1946 
TimeMag. / DepthDistanceLocation
Sat, 5 Sep 2020
Sat, 5 Sep 12:25 UTCM 2.5 / 3 km6 km3 Km Al Norte De Fortuna, Bagaces. (Costa Rica)
Sat, 22 Aug 2020
Sat, 22 Aug 17:49 UTCM 2.8 / 5 km21 km8 km al Norte de Bagaces, Guanacaste. (Costa Rica)
Sat, 22 Aug 17:44 UTCM 3.0 / 5 km22 km19 km ESE of Liberia, New Zealand
Sat, 22 Aug 15:29 UTCM 3.2 / 5 km21 km8 km al Norte de Bagaces, Guanacaste. (Costa Rica)
Thu, 6 Aug 2020
Thu, 6 Aug 15:29 UTCM 3.5 / 138 km17 km2 Km al sureste de Cuatro Bocas, New Zealand
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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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