Sete cidades volcan

stratovolcano, caldera, pyroclastic cones 856 m

Condition actuelle: normal / en sommeil (1 sur 5)
Last update: 22 août 2019

Sete Cidades volcano at the western end of Sao Miguel Island contains a 5-km-wide summit caldera, occupied by two caldera lakes, that is one of the scenic highlights of the Azores.

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Style éruptif tipique: Explosive
Eruptions du volcan Sete cidades: 1500 AD

HeureMag. / ProfondeurDistance/Lieu
lundi, 11. octobre 2021 10:34 GMT (1 séisme)
11 oct. 2021 10:34 (GMT +0) (11. oct. 2021 10:34 GMT)
2.6
50 km (31 mi)
Océan Atlantique Nord, Portugal
jeudi, 7. octobre 2021 00:33 GMT (1 séisme)
7 oct. 2021 00:33 (GMT +0) (7. oct. 2021 00:33 GMT)
2.4
34 km (21 mi)
Océan Atlantique Nord, 45 km à l'ouest de Ponta Delgada, Azores, Portugal

Introduction

The steep-walled, 500-m-deep caldera was formed about 22,000 years ago, and at least 22 post-caldera eruptions have occurred. A large group of Pleistocene post-caldera trachytic lava domes, lava flows, and pyroclastic-flow deposits is found on the western-to-northern flanks. A nearly circular ring of six Holocene pyroclastic cones occupies the caldera floor. These have been the source of a dozen trachytic pumice-fall deposits erupted during the past 5000 years. Sete Cidades is one of the most active Azorean volcanoes. Historical eruptions date back to the 15th century and have occurred from within the caldera and from submarine vents off the west coast.
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Source: Smithsonian GVP


Voyages au volcan Sete cidades :
Green Volcanoes (15 days geo and photo tour to the Azores Islands)

See also: Sentinel hub | Landsat 8
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