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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
Sat, 5 Oct 2019
Sat, 5 Oct 10:32 UTCM 2.7 / 4 km8 km2 km al Oeste de Cuipilapa, Bagaces. (Costa Rica)
Sat, 5 Oct 10:25 UTCM 3.7 / 4 km10 km1 km al Este de Fortuna, Bagaces. (Costa Rica)
Sat, 28 Sep 2019
Sat, 28 Sep 05:29 UTCM 2.7 / 3 km5 km4 km al Este de Mogote, Bagaces. (Costa Rica)
Thu, 26 Sep 2019
Thu, 26 Sep 00:58 UTCM 3.0 / 4 km10 km1 km al Noroeste de Fortuna, Bagaces. (Costa Rica)
Mon, 23 Sep 2019
Mon, 23 Sep 04:07 UTCM 2.9 / 5 km10 km1 km al Oeste de Fortuna, Bagaces. (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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