Terceira volcano

stratovolcano, caldera, lavadomes 1023 m
Azoren, Portugal, 38.74°N / -27.32°W
Current status: normal or dormant (1 out of 5)

Terceira Island contains four stratovolcanoes constructed along a prominent ESE-WNW-trending fissure zone that cuts across the island.

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Typical eruption style: Explosive
Terceira volcano eruptions: holocene

TimeMag. / DepthDistance/Location
Monday, October 4, 2021 04:43 GMT (2 earthquakes)
Oct 4, 2021 4:43 am (GMT +0) (Oct 4, 2021 04:43 GMT)
2.0
48 km (30 mi)
North Atlantic Ocean, 23 km southeast of Santa Cruz da Graciosa, Portugal
Oct 4, 2021 2:36 am (GMT +0) (Oct 4, 2021 02:36 GMT)
2.2
48 km (30 mi)
North Atlantic Ocean, 23 km southeast of Santa Cruz da Graciosa, Portugal

Background

Historically active Santa Barbara volcano at the western end of the island is truncated by two calderas. The youngest of these formed about 15,000 years ago. Comenditic lava domes fill and surround the caldera. Pico Alto lies north of the fissure zone in the north-central part of the island and contains a Pleistocene caldera largely filled by lava domes and lava flows. Guilherme Moniz caldera lies along the fissure zone immediately to the south, and 7-km-wide Cinquio Picos caldera at the SE end of the island is the largest in the Azores. Historical eruptions have occurred from Pico Alto, the fissure zone between Pico Alto and Santa Barbara, and from submarine vents west of Santa Barbara. Most Holocene eruptions have produced basaltic-to-rhyolitic lava flows from the fissure zone transecting the island.

Terceira Photos

Coast of Biscoitos, Terceira Isl., Acores (Photo: WNomad)
Coast of Biscoitos, Terceira Isl., Acores (Photo: WNomad)
Gruta do Algar do Carvao, Terceira Island, Acores (Photo: WNomad)
Gruta do Algar do Carvao, Terceira Island, Acores (Photo: WNomad)
natural volcanic swimming pools of Biscoitos, Terceira Isl., Acores (Photo: WNomad)
natural volcanic swimming pools of Biscoitos, Terceira Isl., Acores (Photo: WNomad)
Lagoa in Gruta do Algar do Carvao, Terceira Island, Acores (Photo: WNomad)
Lagoa in Gruta do Algar do Carvao, Terceira Island, Acores (Photo: WNomad)
 



Terceira volcano tours:
Green Volcanoes (15 days geo and photo tour to the Azores Islands)

See also: Sentinel hub | Landsat 8
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