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Tuesday, Nov 22, 2016
Volcanic Ash Advisory Center Toulouse (VAAC) issued the following report: ... [more]
 

Sete Cidades volcano

stratovolcano, caldera, pyroclastic cones 856 m
Azores, Portugal, Azores & Madeira, 37.86°N / -25.79°W
Current status: normal or dormant (1 out of 5) | Reports
Sete Cidades volcano books
Last update: 13 Feb 2018
Typical eruption style: Explosive
Sete Cidades volcano eruptions: 1500 AD
TimeMag. / DepthDistanceLocation
Mon, 12 Nov
Mon, 12 Nov 17:29 UTCM 2.4 / 3.6 km29 kmFossa Hirondelle
Fri, 26 Oct
Fri, 26 Oct 23:59 UTCM 1.2 / 1 km6 kmFogo-Congro (S. Miguel)
Fri, 26 Oct 23:55 UTCM 1.4 / 1.3 km5 kmFogo-Congro (S. Miguel)
Fri, 26 Oct 23:51 UTCM 1.1 / 1 km5 kmFogo-Congro (S. Miguel)
Tue, 23 Oct
Tue, 23 Oct 07:42 UTCM 2.5 / 3.1 km4 kmFogo-Congro (S. Miguel)
View all recent quakes
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.

Background:

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

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