Terceira

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  • Portugal
  • Azores
  • Stratovolcano(es)
  • 2000 CE
  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 38.73°N
  • 27.32°W

  • 1023 m
    3355 ft

  • 382050
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

There are no activity reports for Terceira.



 Available Weekly Reports

There are no Weekly Reports available for Terceira.

Summary of eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1998 Nov 25 (?) 2000 Mar (?) Confirmed 0 Historical Observations Serreta Ridge (submarine vent W of Terceira)
1867 Jun 1 1867 Jun 8 Confirmed 3 Historical Observations Submarine vent 3-6 WNW of Terceira
1761 Apr 17 1761 Apr 28 (?) Confirmed 2 Historical Observations Fissure zone (east of Santa Barbara)
1400 ± 50 years Unknown Confirmed   Tephrochronology Farol I dome (Santa Barbara)
1200 ± 300 years Unknown Confirmed   Tephrochronology Guilherme Moniz (Pico Alto)
0920 ± 50 years Unknown Confirmed   Radiocarbon (uncorrected) Guilherme Moniz (Quinta da Madalena)
0820 ± 40 years Unknown Confirmed   Radiocarbon (uncorrected) Santa Barbara
0190 ± 40 years Unknown Confirmed   Radiocarbon (uncorrected) Guilherme Moniz (Pico Alto)
0070 ± 40 years Unknown Confirmed   Radiocarbon (uncorrected) Fissure zone (east of Santa Barbara)
0060 BCE (?) Unknown Confirmed   Radiocarbon (uncorrected) Fissure zone (south of Pico Alto)
0090 BCE ± 100 years Unknown Confirmed   Radiocarbon (uncorrected) Fissure zone (east of Santa Barbara)
0670 BCE ± 300 years Unknown Confirmed   Radiocarbon (uncorrected) Guilherme Moniz, Biscoito Rachado deposit
0940 BCE ± 50 years Unknown Confirmed   Radiocarbon (uncorrected) Santa Barbara NW flank (Lagoinha dome)
2530 BCE ± 40 years Unknown Confirmed   Radiocarbon (uncorrected) Fissure zone (east of Santa Barbara)
6720 BCE ± 50 years Unknown Confirmed   Radiocarbon (uncorrected) Guilherme Moniz (Pico das Pardelas)

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Calvert A T, Moore R B, McGeehin J P, Rodrigues da Silva A M, 2006. Volcanic history and 40Ar/39Ar and 14C geochronology of Terceira Island, Azores, Portugal. J Volc Geotherm Res: 156: 103-115.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

Neumann van Padang M, Richards A F, Machado F, Bravo T, Baker P E, Le Maitre R W, 1967. Atlantic Ocean. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 21: 1-128.

Self S, 1976. The recent volcanology of Terceira, Azores. J Geol Soc London, 132: 645-666.

Self S, 1978. . (pers. comm.).

Self S, Gunn B M, 1976. Petrology, volume and age relations of alkaline and saturated peralkaline volcanics from Terceira, Azores. Contr Mineral Petr, 54: 293-313.

Zbyszewski G, Candido de Medeiros A, Veiga Ferreira O da, Torre de Assuncao C, 1971. Geologic map of Ilha Terceira (Azores). Servicos Geologicos Portugal, 1:50,000 scale map with 43 p text (in Portuguese).

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