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Ubinas

Stratovulcano · Peru · 5608 m

Volcán Ubinas, seen here from the west, is Perú's most active volcano. A small, 1.2-km-wide caldera that cuts the top of Ubinas gives it a truncated appearance. The upper slopes of the stratovolcano steepen to nearly 45 degrees. The steep-walled, 150-m-deep caldera contains an ash cone with a 500-m-wide funnel-shaped vent that is 200-m deep. Holocene lava flows are visible on the volcano's flanks, but historical activity, documented since the 16th century, has consisted of intermittent minor explosive eruptions.
Volcán Ubinas, seen here from the west, is Perú's most active volcano. A small, 1.2-km-wide caldera that cuts the top of Ubinas gives it a truncated appearance. The upper slopes of the stratovolcano steepen to nearly 45 degrees. The steep-walled, 150-m-deep caldera contains an ash cone with a 500-m-wide funnel-shaped vent that is 200-m deep. Holocene lava flows are visible on the volcano's flanks, but historical activity, documented since the 16th century, has consisted of intermittent minor explosive eruptions. · Foto: Photo by Norm Banks, 1988 (U.S. Geological Survey). · Wikimedia Commons
Tipo
Stratovulcano
Paese
Peru
Regione
South America Volcanic Regions / Central Andean Volcanic Arc
Altitudine
5608 m
Coordinate
-16.345, -70.897
Ultima eruzione
2024
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Composite
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

The truncated appearance of Ubinas, Perú's most active volcano, is a result of a 1.4-km-wide crater at the summit. It is the northernmost of three young volcanoes located along a regional structural lineament about 50 km behind the main volcanic front. The growth and destruction of Ubinas I was followed by construction of Ubinas II beginning in the mid-Pleistocene. The upper slopes of the andesitic-to-rhyolitic Ubinas II stratovolcano are composed primarily of andesitic and trachyandesitic lava flows and steepen to nearly 45°. The steep-walled, 150-m-deep summit crater contains an ash cone with a 500-m-wide funnel-shaped vent that is 200 m deep. Debris-avalanche deposits from the collapse of the SE flank about 3,700 years ago extend 10 km from the volcano. Widespread Plinian pumice-fall deposits include one from about 1,000 years ago. Holocene lava flows are visible on the flanks, but activity documented since the 16th century has consisted of intermittent minor-to-moderate explosive eruptions.

Sintesi da Wikipedia

Riassunto in inglese

Ubinas is an active stratovolcano in the Moquegua Region of southern Peru, approximately 60 kilometres (37 mi) east of the city of Arequipa. Part of the Central Volcanic Zone of the Andes, it rises 5,672 metres (18,609 ft) above sea level. The volcano's summit is cut by a 1.4-kilometre-wide (0.87 mi) and 150-metre-deep (490 ft) caldera, which itself contains a smaller crater. Below the summit, Ubinas has the shape of an upwards-steepening cone with a prominent notch on the southern side. The gently sloping lower part of the volcano is also known as Ubinas I and the steeper upper part as Ubinas II; they represent different stages in the volcano's geological history.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
8560 BCE~8207 BCE · 1 eruzioni · VEI max. ?7149 BCE~6796 BCE · 1 eruzioni · VEI max. ?966~1318 · 1 eruzioni · VEI max. 51318~1671 · 4 eruzioni · VEI max. 31671~2024 · 21 eruzioni · VEI max. 38560 BCE6090 BCE3268 BCE798 BCE1671

Cronologia dettagliata

  1. 2024VEI 2Osservata
    2024-05-06 – 2024-06-11
  2. 2023VEI 3Osservata
    2023-06-22 – 2023-12-15
  3. 2019VEI 2Osservata
    2019-06-24 – 2019-09-12
  4. 2016VEI 2Osservata
    2016-09-13 – 2017-03-02
    Summit crater
  5. 2013VEI 2Osservata
    2013-09-01 – 2016-02-27
    Summit crater
  6. 2010VEI 1Osservata
    2010-07-18 – 2010-07-18
  7. 2006VEI 2Osservata
    2006-03-25 – 2009-07-04
  8. 1969VEI 2Osservata
    1969-06-16 – In corso
  9. 1956VEI 2Osservata
    1956-05-16 – 1956-10-21
  10. 1951VEI 2Osservata
    1951-07-23 – In corso
  11. 1937VEI 2Osservata
    1937-06 – In corso
  12. 1907VEI 2Osservata
    1907 – In corso
  13. 1906VEI 2Osservata
    1906-10 – In corso
  14. 1869VEI 2Osservata
    1869-10 – In corso
  15. 1867VEI 2Osservata
    1867-05-24 – 1867-05-28
  16. 1865VEI 2Osservata
    1865 – In corso
  17. 1862VEI 2Osservata
    1862 – In corso
  18. 1830VEI 2Osservata
    1830 – In corso
  19. 1826VEI ?Stima geologica
    1826 – In corso
  20. 1784VEI 2Osservata
    1784 – In corso
  21. 1677VEI 3Osservata
    1677 – In corso
  22. 1667VEI 3Osservata
    1667 – In corso
  23. 1662VEI 3Osservata
    1662 – In corso
  24. 1600VEI 2Stima geologica
    1600 – In corso
  25. 1550 (±50 anni)VEI 3Osservata
    1550 – In corso
  26. 1082 (±82 anni)VEI 5Stima geologica
    1082 – In corso
  27. 6850 a.C. (±150 anni)VEI ?Stima geologica
    BCE 6850 – In corso
  28. 8560 a.C. (±300 anni)VEI ?Stima geologica
    BCE 8560 – In corso

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