Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Sete Cidades
A small peninsula juts into Lagoa Azul ("Blue Lake"), one of two lakes partially filling the summit caldera on Sete Cidades volcano at the western end of Sao Miguel Island. The 5-km-wide caldera was formed about 22,000 years ago, and at least 22 post-caldera eruptions have occurred. This view looks to the NW from the rim of a post-caldera cone, Caldiera Grande. Two other post-caldera cones, Caldiera do Alfreres and Seara Cerrado da Ladeira, lie across the lake, behind and to the right of the town of Sete Cidades. Photo by R.V. Fisher, 1980 (University of California Santa Barbara).
Volcano Number:382080
Volcano Name:Sete Cidades
Country:Portugal
Volcano Type:Stratovolcano
Last Eruption:1880
Elevation:856m
Tectonic Setting:Rift zone / Oceanic crust (< 15 km)
Pop. within 5km:3515
Pop. within 10km:10365
Pop. within 30km:102848
Pop. within 100km:127154
Latitude:37.87
Longitude:-25.78



Eruption Data from the Global Volcanism Program of the Smithsonian Institution
Volcano Number Volcano Name Eruption Number Activity Type Explosivity Index Max Explosivity Index Modifier Activity Area Activity Unit Start Evidence Method Start Date End Date
382080 Sete Cidades 13008 Confirmed Eruption 4 Seara Cerrado da Ladeira Tephrochronology -3050
382080 Sete Cidades 13009 Confirmed Eruption Caldeira do Alfreres and NW flank Tephrochronology -2050
382080 Sete Cidades 13010 Confirmed Eruption SE flank (Eguas) Radiocarbon (uncorrected) -750
382080 Sete Cidades 13011 Confirmed Eruption 4 SE caldera floor (Lagoa de Santiago) Radiocarbon (uncorrected) 90
382080 Sete Cidades 13012 Confirmed Eruption 4 SE caldera floor (Lagoa Rasa) Tephrochronology 380
382080 Sete Cidades 13013 Confirmed Eruption 3 SE flank (Carvao) Radiocarbon (uncorrected) 670
382080 Sete Cidades 13014 Confirmed Eruption 2 SE flank (Ferraria) Radiocarbon (uncorrected) 950
382080 Sete Cidades 13015 Confirmed Eruption 2 West flank (Ponta de Ferraria) Radiocarbon (uncorrected) 1110
382080 Sete Cidades 13016 Confirmed Eruption 4 SW side of caldera (Caldeira Seca) Historical Observations 1444
382080 Sete Cidades 13017 Confirmed Eruption 2 Submarine vent west of Sete Cidades Historical Observations 1638/7/3 1638/7/28
382080 Sete Cidades 13018 Confirmed Eruption 2 Submarine vent west of Sete Cidades Historical Observations 1682/12/13
382080 Sete Cidades 13019 Confirmed Eruption 2 West flank (Pico das Camarinhas) Historical Observations 1713
382080 Sete Cidades 13020 Confirmed Eruption 2 ? Submarine vent west of Sete Cidades Historical Observations 1811/2/1 1811/2/8
382080 Sete Cidades 13021 Confirmed Eruption 3 Submarine vent west of Sete Cidades Historical Observations 1811/6/14 1811/6/22
382080 Sete Cidades 13022 Confirmed Eruption 0 Volcano Uncertain: submarine vent off Sao Miguel 1861
382080 Sete Cidades 13023 Confirmed Eruption 0 Volcano Uncertain: submarine vent off Sao Miguel 1880
Emissions Data from the Global Volcanism Program of the Smithsonian Institution No emissions data found for this volcano.


Data from the Earthchem Portal


Data from the SESAR Database


Data from the MaGa Database
Sorry. No data exist for this volcano in the MaGa database.