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Terceira volcano

stratovolcano, caldera, lavadomes 1023 m
Azores, Portugal, Azores & Madeira, 38.74°N / -27.32°W
Current status: normal or dormant (1 out of 5) | Reports
Terceira volcano books | Tours
Typical eruption style: Explosive
Terceira volcano eruptions: holocene
TimeMag. / DepthDistanceLocation
Tue, 20 Oct 2020 (UTC)
20 Oct 5:39 pm (GMT +0) (20 Oct 17:39:38 UTC)M 2.16 kmWSW Serreta (Terceira), Portugal
20 Oct 4:25 am (GMT +0) (20 Oct 04:25:13 UTC)M 2.12 kmSta. Barbara (Terceira), Portugal
Mon, 7 Sep 2020 (UTC)
Mon, 7 Sep 18:00 UTCM 2.25 kmSta. Barbara (Terceira) (Portugal)
Mon, 7 Sep 18:00 UTCM 2.8 / 6 km4 kmAzores Islands, Portugal
Tue, 25 Aug 2020 (UTC)
Tue, 25 Aug 17:36 UTCM 2.9 / 1 km1 kmAzores Islands, Portugal
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Terceira Island contains four stratovolcanoes constructed along a prominent ESE-WNW-trending fissure zone that cuts across the island.

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)
 


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