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Vulcano Arenal

Arenal

Stratovulcano · Costa Rica · 1670 m

A Strombolian eruption is seen here at Arenal on 15 June 1997. The oldest known Arenal products are about 7,000 years old, and the volcano was active for several thousand years contemporaneously with the older Chato volcano (lower right). A recent eruptive period began with a major explosive event in 1968, and frequent explosive activity and slow lava effusion continued through to 2010.
A Strombolian eruption is seen here at Arenal on 15 June 1997. The oldest known Arenal products are about 7,000 years old, and the volcano was active for several thousand years contemporaneously with the older Chato volcano (lower right). A recent eruptive period began with a major explosive event in 1968, and frequent explosive activity and slow lava effusion continued through to 2010. · Foto: Photo by Olger Aragón, 1997. · Wikimedia Commons
Tipo
Stratovulcano
Paese
Costa Rica
Regione
Middle America-Caribbean Volcanic Regions / Central America Volcanic Arc
Altitudine
1670 m
Coordinate
10.463, -84.703
Ultima eruzione
2010
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Composite
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

Conical Volcán Arenal is the youngest stratovolcano in Costa Rica and one of its most active. The 1670-m-high andesitic volcano towers above the eastern shores of Lake Arenal, which has been enlarged by a hydroelectric project. Arenal lies along a volcanic chain that has migrated to the NW from the late-Pleistocene Los Perdidos lava domes through the Pleistocene-to-Holocene Chato volcano, which contains a 500-m-wide, lake-filled summit crater. The earliest known eruptions of Arenal took place about 7000 years ago, and it was active concurrently with Cerro Chato until the activity of Chato ended about 3500 years ago. Growth of Arenal has been characterized by periodic major explosive eruptions at several-hundred-year intervals and periods of lava effusion that armor the cone. An eruptive period that began with a major explosive eruption in 1968 ended in December 2010; continuous explosive activity accompanied by slow lava effusion and the occasional emission of pyroclastic flows characterized the eruption from vents at the summit and on the upper western flank.

Sintesi da Wikipedia

Riassunto in inglese

Arenal Volcano is a recently active andesitic stratovolcano in north-western Costa Rica around 90 km (56 mi) northwest of San José, in the province of Alajuela, canton of San Carlos, and district of La Fortuna. The Arenal volcano stands 1,633 metres (5,358 ft) high. It is conically shaped with a crater 140 metres (460 ft) in diameter. Geologically, Arenal is considered a young volcano and it is estimated to be less than 7,500 years old. It is also known as "Pan de Azúcar", "Canaste", "Volcan Costa Rica", "Volcan Río Frío" or "Guatusos Peak".

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
5060 BCE~4826 BCE · 1 eruzioni · VEI max. 44591 BCE~4357 BCE · 1 eruzioni · VEI max. ?4123 BCE~3889 BCE · 1 eruzioni · VEI max. 43420 BCE~3186 BCE · 2 eruzioni · VEI max. 42952 BCE~2717 BCE · 1 eruzioni · VEI max. 42483 BCE~2249 BCE · 1 eruzioni · VEI max. 41780 BCE~1546 BCE · 2 eruzioni · VEI max. 41546 BCE~1312 BCE · 1 eruzioni · VEI max. 41312 BCE~1077 BCE · 1 eruzioni · VEI max. 4843 BCE~609 BCE · 1 eruzioni · VEI max. 0609 BCE~375 BCE · 1 eruzioni · VEI max. 4375 BCE~140 BCE · 2 eruzioni · VEI max. 4328~562 · 2 eruzioni · VEI max. 4562~797 · 3 eruzioni · VEI max. 4797~1031 · 2 eruzioni · VEI max. 41265~1499 · 2 eruzioni · VEI max. 41734~1968 · 4 eruzioni · VEI max. 35060 BCE3420 BCE1546 BCE941734

Cronologia dettagliata

  1. 1968VEI 3Osservata
    1968-07-29 – 2010-12-16
    W flank & summit
  2. 1922VEI 2Osservata
    1922-10-05 – 1922-10-23
  3. 1915VEI 2Stima geologica
    1915-02-05 – In corso
  4. 1750 (±50 anni)VEI 0Stima geologica
    1750 – In corso
    Summit and NW flank (A2 lava flows)
  5. 1440VEI 2Stima geologica
    1440 – In corso
  6. 1400VEI 4Stima geologica
    1400 – In corso
  7. 1030VEI 4Stima geologica
    1030 – In corso
  8. 1020VEI 4Stima geologica
    1020 – In corso
  9. 750 (±50 anni)VEI 4Stima geologica
    750 – In corso
  10. 700VEI 4Stima geologica
    700 – In corso
  11. 650 (±100 anni)VEI 4Stima geologica
    650 – In corso
  12. 550VEI 4Stima geologica
    550 – In corso
  13. 400VEI 4Stima geologica
    400 – In corso
  14. 170 a.C. (±200 anni)VEI 4Stima geologica
    BCE 170 – In corso
  15. 270 a.C.VEI 4Stima geologica
    BCE 270 – In corso
  16. 380 a.C. (±200 anni)VEI 4Stima geologica
    BCE 380 – In corso
  17. 830 a.C. (±500 anni)VEI 0Stima geologica
    BCE 830 – In corso
  18. 1250 a.C. (±200 anni)VEI 4Stima geologica
    BCE 1250 – In corso
  19. 1450 a.C.VEI 4Stima geologica
    BCE 1450 – In corso
  20. 1650 a.C.VEI 4Stima geologica
    BCE 1650 – In corso
  21. 1770 a.C. (±100 anni)VEI ?Stima geologica
    BCE 1770 – In corso
    Cerro Chato
  22. 2250 a.C.VEI 4Stima geologica
    BCE 2250 – In corso
  23. 2800 a.C.VEI 4Stima geologica
    BCE 2800 – In corso
  24. 3190 a.C. (±100 anni)VEI ?Stima geologica
    BCE 3190 – In corso
    Cerro Chato
  25. 3350 a.C.VEI 4Stima geologica
    BCE 3350 – In corso
  26. 3900 a.C.VEI 4Stima geologica
    BCE 3900 – In corso
  27. 4450 a.C.VEI ?Stima geologica
    BCE 4450 – In corso
  28. 5060 a.C. (±150 anni)VEI 4Stima geologica
    BCE 5060 – In corso

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