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Cerro Azul

Azul, Cerro

Gunung api perisai · Ecuador · 1640 m

A large tuff cone occupies the ENE side of the summit caldera of Cerro Azul volcano at the SW tip of Isabela Island. A small caldera bench is seen above the cone at the upper right, and a larger bench on the northern side of the caldera is outlined by the light-colored line below the horizon at the upper left. The 4 x 5 km wide caldera is one of the smallest of the Galápagos shield volcanoes, but its 650 m depth makes it one of the deepest. Youthful dark-colored lava flows at the left cover much of the caldera floor.
A large tuff cone occupies the ENE side of the summit caldera of Cerro Azul volcano at the SW tip of Isabela Island. A small caldera bench is seen above the cone at the upper right, and a larger bench on the northern side of the caldera is outlined by the light-colored line below the horizon at the upper left. The 4 x 5 km wide caldera is one of the smallest of the Galápagos shield volcanoes, but its 650 m depth makes it one of the deepest. Youthful dark-colored lava flows at the left cover much of the caldera floor. · Foto: Photo by Tom Simkin (Smithsonian Institution). · Wikimedia Commons
Tipe
Gunung api perisai
Negara
Ecuador
Wilayah
Eastern Pacific Volcanic Regions / Galapagos Hotspot Volcano Group
Ketinggian
1640 m
Koordinat
-0.920, -91.408
Letusan terakhir
2008
Kondisi tektonik
Rift zone / Oceanic crust (< 15 km)
Bentuk lahan
Shield
Batuan utama
Basalt / Picro-Basalt
Ringkasan geologi

Located at the SW tip of the J-shaped Isabela Island, Cerro Azul contains a steep-walled 4 x 5 km nested summit caldera complex that is one of the smallest diameter, but at 650 m one of the deepest in the Galápagos Islands. The shield volcano is the second highest of the archipelago. A conspicuous bench occupies the SW and west sides of the caldera, which formed during several episodes of collapse. Youthful lava flows cover much of the caldera floor, which has also contained ephemeral lakes. A prominent tuff cone located at the ENE side of the caldera is evidence of episodic hydrovolcanism. Numerous spatter cones dot the western flanks. Fresh-looking lava flows, many erupted from circumferential fissures, descend the NE and NW flanks. Historical eruptions date back only to 1932, but Cerro Azul has been one of the most active Galápagos volcanoes since that time. Solfataric activity continues within the caldera.

Ringkasan Wikipedia

Ringkasan Inggris

Cerro Azul is a shield volcano on the south western part of Isabela Island in the Galápagos Islands. At a height of 1,689 m (5,541 ft) it is the second highest peak in the Galapagos and due to its topographic prominence of over 1,500 m (4,921 ft) it is categorised as an ultra. The volcano is one of the most active in the Galapagos, with the last eruption between May and June 2008.

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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
950 BCE~753 BCE · 1 letusan · VEI maks. 0556 BCE~358 BCE · 1 letusan · VEI maks. 01219~1416 · 1 letusan · VEI maks. 01811~2008 · 12 letusan · VEI maks. 3950 BCE161 BCE43012191811

Garis waktu rinci

  1. 2008VEI 1Teramati
    2008-05-29 – 2008-06-17
    Summit and SE flank
  2. 1998VEI 1Teramati
    1998-09-15 – 1998-10-21
    N & W caldera floor, SE flank (630-680 m)
  3. 1979VEI 2Teramati
    1979-01-29 – 1979-03-04
    East flank (300 m) and summit
  4. 1968VEI ?Perkiraan geologi
    1968-06-12 – Berlangsung
    North flank?
  5. 1959VEI 2Teramati
    1959-06-29 – 1959-07-31
    East flank
  6. 1951VEI ?Teramati
    1951-07-02 – Berlangsung
  7. 1949VEI 0Teramati
    1949 – Berlangsung
  8. 1948VEI 0Teramati
    1948-06-30 – Berlangsung
  9. 1943VEI 3Teramati
    1943-04-13 – 1943-05-11
    Caldera ring fracture
  10. 1940VEI 0Teramati
    1940 – Berlangsung
    East flank (Cerro de Las Animas)
  11. 1932VEI 1Teramati
    1932 – Berlangsung
  12. 1850VEI ?Perkiraan geologi
    1850 – Berlangsung
  13. 1250VEI 0Perkiraan geologi
    1250 – Berlangsung
  14. 550 SM (±1300 tahun)VEI 0Perkiraan geologi
    BCE 550 – Berlangsung
  15. 950 SM (±900 tahun)VEI 0Perkiraan geologi
    BCE 950 – Berlangsung

Tautan eksternal

⚠ Untuk referensi saja. Bukan untuk tanggap darurat.