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)

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Typical eruption style: unspecified
Miravalles volcano eruptions: 1946 

TimeMag. / DepthDistance/Location
Tuesday, October 26, 2021 09:40 GMT (1 earthquake)
Oct 26, 2021 3:40 am (GMT -6) (Oct 26, 2021 09:40 GMT)
2.8

3 km
21 km (13 mi)
21 km northeast of Liberia, Provincia de Guanacaste, Costa Rica
Saturday, October 23, 2021 16:15 GMT (2 earthquakes)
Oct 23, 2021 10:15 am (GMT -6) (Oct 23, 2021 16:15 GMT)
3.0

4 km
18 km (11 mi)
Cañas, Provincia de Guanacaste, 34 km southeast of San Jose, Costa Rica
Oct 23, 2021 10:00 am (GMT -6) (Oct 23, 2021 16:00 GMT)
2.9

3 km
22 km (14 mi)
Cañas, Provincia de Guanacaste, 36 km southeast of San Jose, Costa Rica
Thursday, October 21, 2021 12:05 GMT (1 earthquake)
Oct 21, 2021 6:05 am (GMT -6) (Oct 21, 2021 12:05 GMT)
2.4

5 km
26 km (16 mi)
Guatuso, Provincia de Alajuela, 26 km northeast of Canas, Costa Rica
Wednesday, October 20, 2021 21:12 GMT (1 earthquake)
Oct 20, 2021 3:12 pm (GMT -6) (Oct 20, 2021 21:12 GMT)
1.9

85 km
42 km (26 mi)
Tilaran, Provincia de Guanacaste, Costa Rica

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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