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Miravalles volcan

Stratovolcano 2028 m / 6,653 ft
Costa Rica, 10.75°N / -85.15°W
Condition actuelle: normal / en sommeil (1 sur 5) | Reports
Miravalles livres
Style éruptif tipique: unspecified
Eruptions du volcan Miravalles: 1946 
HeureMag. / DepthDistanceLocation
Tue, 16 Jul 2019
Tue, 16 Jul 18:57 UTCM 4.1 / 6 km19 km10 km al Suroeste de Fortuna, Bagaces. (Costa Rica)
Tue, 16 Jul 07:23 UTCM 3.1 / 7 km19 km10 km al Norte de Bagaces, Guanacaste. (Costa Rica)
Fri, 12 Jul 2019
Fri, 12 Jul 06:15 UTCM 2.9 / 6 km20 km10 km al Norte de Bagaces, Guanacaste. (Costa Rica)
Thu, 11 Jul 2019
Thu, 11 Jul 17:56 UTCM 2.9 / 5 km21 km9 km al Norte de Bagaces, Guanacaste. (Costa Rica)
Thu, 11 Jul 15:22 UTCM 4.2 / 6 km19 km10 km al Suroeste de Fortuna, Bagaces. (Costa Rica)
Voir tous

Introduction:

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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