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Terceira

Stratovolkan · Portugal · 1023 m

The Monte Brasil pyroclastic cone is seen here beyond the city of Angra do Heroísmo on the south-central coast of Terceira Island. The 1.4 km wide cone is attached to the island by a small peninsula, and is related to the activity of the Guilherme Moniz volcano, which occupies the center of Terceira.
The Monte Brasil pyroclastic cone is seen here beyond the city of Angra do Heroísmo on the south-central coast of Terceira Island. The 1.4 km wide cone is attached to the island by a small peninsula, and is related to the activity of the Guilherme Moniz volcano, which occupies the center of Terceira. · Foto: Photo by Luís A. da Silveira, 2007 (Wikimedia Commons). · Wikimedia Commons
Tipe
Stratovolkan
Negara
Portugal
Wilayah
Samudra Atlantik / Azores-Terceira Rift Volcanic Province
Ketinggian
1023 m
Koordinat
38.730, -27.320
Letusan terakhir
2000
Kondisi tektonik
Rift zone / Oceanic crust (< 15 km)
Bentuk lahan
Composite
Batuan utama
Basalt / Picro-Basalt
Ringkasan geologi

Terceira Island contains multiple stratovolcanoes constructed along a prominent ESE-WNW 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 which 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 is at the SE end of the island. 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.

Ringkasan Wikipedia

Ringkasan Inggris

Terceira is a volcanic island in the Azores archipelago of Portugal, 1,181 km (734 mi) due west of Lisbon. It is one of the larger islands of the archipelago, with a population of 53,311 inhabitants in an area of approximately 396.75 km2 (153.19 sq mi).

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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
6720 BCE~6429 BCE · 1 letusan · VEI maks. ?2652 BCE~2361 BCE · 1 letusan · VEI maks. ?1199 BCE~908 BCE · 1 letusan · VEI maks. ?908 BCE~617 BCE · 1 letusan · VEI maks. ?327 BCE~36 BCE · 2 letusan · VEI maks. ?36 BCE~254 · 2 letusan · VEI maks. ?545~836 · 1 letusan · VEI maks. ?836~1126 · 1 letusan · VEI maks. ?1126~1417 · 2 letusan · VEI maks. ?1707~1998 · 3 letusan · VEI maks. 36720 BCE4686 BCE2361 BCE327 BCE1707

Garis waktu rinci

  1. 1998VEI 0Teramati
    1998-11-25 – 2000-03-16
    Serreta Ridge (submarine vent W of Terceira)
  2. 1867VEI 3Teramati
    1867-06-01 – 1867-06-08
    Submarine vent 3-6 WNW of Terceira
  3. 1761VEI 2Teramati
    1761-04-17 – 1761-04-28
    Fissure zone (east of Santa Barbara)
  4. 1400 (±50 tahun)VEI ?Perkiraan geologi
    1400 – Berlangsung
    Farol I dome (Santa Barbara)
  5. 1200 (±300 tahun)VEI ?Perkiraan geologi
    1200 – Berlangsung
    Guilherme Moniz (Pico Alto)
  6. 920 (±50 tahun)VEI ?Perkiraan geologi
    920 – Berlangsung
    Guilherme Moniz (Quinta da Madalena)
  7. 820 (±40 tahun)VEI ?Perkiraan geologi
    820 – Berlangsung
    Santa Barbara
  8. 190 (±40 tahun)VEI ?Perkiraan geologi
    190 – Berlangsung
    Guilherme Moniz (Pico Alto)
  9. 70 (±40 tahun)VEI ?Perkiraan geologi
    70 – Berlangsung
    Fissure zone (east of Santa Barbara)
  10. 60 SMVEI ?Perkiraan geologi
    BCE 60 – Berlangsung
    Fissure zone (south of Pico Alto)
  11. 90 SM (±100 tahun)VEI ?Perkiraan geologi
    BCE 90 – Berlangsung
    Fissure zone (east of Santa Barbara)
  12. 670 SM (±300 tahun)VEI ?Perkiraan geologi
    BCE 670 – Berlangsung
    Guilherme Moniz
  13. 940 SM (±50 tahun)VEI ?Perkiraan geologi
    BCE 940 – Berlangsung
    Santa Barbara NW flank (Lagoinha dome)
  14. 2530 SM (±40 tahun)VEI ?Perkiraan geologi
    BCE 2530 – Berlangsung
    Fissure zone (east of Santa Barbara)
  15. 6720 SM (±50 tahun)VEI ?Perkiraan geologi
    BCE 6720 – Berlangsung
    Guilherme Moniz (Pico das Pardelas)

Tautan eksternal

⚠ Untuk referensi saja. Bukan untuk tanggap darurat.