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Jólnir

Vestmannaeyjar

Frattura eruttiva · Iceland · 283 m

The island of Heimaey, about 10 km off the south coast of Iceland, is part of the Vestmannaeyjar volcanic system, which comprises numerous islands and submarine vents. Heimaey probably formed in the Holocene, through numerous eruptions. Here, an ash-laden eruption plume rises above a volcanic cone behind the town of Vestmannaeyjar in 1973. The water pumping operation in the foreground was designed to cool the front of an advancing lava flow that threatened the town and its harbor.
The island of Heimaey, about 10 km off the south coast of Iceland, is part of the Vestmannaeyjar volcanic system, which comprises numerous islands and submarine vents. Heimaey probably formed in the Holocene, through numerous eruptions. Here, an ash-laden eruption plume rises above a volcanic cone behind the town of Vestmannaeyjar in 1973. The water pumping operation in the foreground was designed to cool the front of an advancing lava flow that threatened the town and its harbor. · Foto: Photo by Jack Lockwood, 1973 (U.S. Geological Survey). · Wikimedia Commons
Tipo
Frattura eruttiva
Paese
Iceland
Regione
Atlantic Ocean Volcanic Regions / Iceland Neovolcanic Rift Volcanic Province
Altitudine
283 m
Coordinate
63.416, -20.266
Ultima eruzione
1973
Contesto tettonico
Rift zone / Oceanic crust (< 15 km)
Forma vulcanica
Cluster
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

The mostly submarine Vestmannaeyjar volcanic system is the southernmost and youngest volcanic center of the Eastern Volcanic Zone that cuts across E-central Iceland. It consists of a roughly 30 x 40 km group of basaltic islands and submarine cones occupying a shallow shelf off the S coast of Iceland, and was the site of two of Iceland's most noted 20th-century eruptions. The island of Surtsey grew from the ocean floor during 1963-67. The island of Heimaey, 20 km to the NE, was the site of eruptions in 1973, during which lava flows partially overran the town of Vestmannaeyjar and threatened its harbor. Twenty-two postglacial eruption sites are known, and all ten subaerial vents on Heimaey are of Holocene age.

Sintesi da Wikipedia

Riassunto breve — apri l'articolo completo per maggiori dettagli.

Jólnir è stata un'isola vulcanica a sud dell'Islanda.

Wikipedia · CC BY-SA · Leggi l'articolo completo →

Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
8050 BCE~7716 BCE · 1 eruzioni · VEI max. 47716 BCE~7382 BCE · 1 eruzioni · VEI max. 36379 BCE~6045 BCE · 1 eruzioni · VEI max. ?4709 BCE~4375 BCE · 1 eruzioni · VEI max. ?4375 BCE~4041 BCE · 1 eruzioni · VEI max. 34041 BCE~3707 BCE · 1 eruzioni · VEI max. ?1305~1639 · 1 eruzioni · VEI max. ?1639~1973 · 3 eruzioni · VEI max. 38050 BCE5711 BCE3038 BCE700 BCE1639

Cronologia dettagliata

  1. 1973VEI 3Osservata
    1973-01-23 – 1973-06-28
    Heimaey (Eldfell)
  2. 1963VEI 3Osservata
    1963-11-08 – 1967-06-05
    Surtsey
  3. 1896VEI ?Osservata
    1896-09 – In corso
    South or SE of Hellisey
  4. 1637VEI ?Osservata
    1637-10 – 1638-02-28
    SW of Heimaey ?
  5. 3950 a.C. (±300 anni)VEI ?Stima geologica
    BCE 3950 – In corso
    Heimaey (Helgafell)
  6. 4270 a.C. (±200 anni)VEI 3Stima geologica
    BCE 4270 – In corso
    Heimaey (Saefell tuff cone)
  7. 4550 a.C. (±500 anni)VEI ?Stima geologica
    BCE 4550 – In corso
    Heimaey (Stórhöfdi tuff cone)
  8. 6050 a.C.VEI ?Stima geologica
    BCE 6050 – In corso
    Alsey, Brandur, Sudurey, Hellisey
  9. 7550 a.C.VEI 3Stima geologica
    BCE 7550 – In corso
    NW Heimaey (Nordurklettar)
  10. 8050 a.C.VEI 4Stima geologica
    BCE 8050 – In corso
    NW Heimaey (Háin tuff ring)

Link esterni

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