Antartide · Caldera
isola Deception
Deception Island
- Tipo
- Caldera
- Altitudine
- 602 m
- Ultima eruzione
- 1970
- Tipo
- Caldera
- Paese
- Antartide
- Regione
- Antartide e Scotia / South Shetlands Volcanic Arc
- Altitudine
- 602 m
- Coordinate
- -62.957, -60.637
- Ultima eruzione
- 1970
- Contesto tettonico
- Intraplacca / Crosta continentale (> 25 km)
- Forma vulcanica
- Caldera
- Roccia principale
- Basalto / Picrobasalto
Sintesi geologica
Ring-shaped Deception Island, at the SW end of the South Shetland Islands, NE of Graham Land Peninsula, was constructed along the axis of the Bransfield Rift spreading center. A narrow passageway named Neptunes Bellows provides an entrance to a natural harbor within the 8.5 x 10 km caldera that was utilized as an Antarctic whaling station. Numerous vents along ring fractures circling the low 14-km-wide island have been reported active for more than 200 years. Maars line the shores of 190-m-deep Port Foster caldera bay. Among the largest of these maars is 1-km-wide Whalers Bay, at the entrance to the harbor. Eruptions during the past 8,700 years have been dated from ash layers in lake sediments on the Antarctic Peninsula and neighboring islands.
Sintesi da Wikipedia
Riassunto in ingleseDeception Island is in the South Shetland Islands close to the Antarctic Peninsula with a large and usually "safe" natural harbour, which is occasionally affected by the underlying active volcano. This island is the caldera of an active volcano, which seriously damaged local scientific stations in 1967 and 1969. The island previously held a whaling station. It has now become a tourist destination, attracting over 15,000 visitors annually. Two research stations are operated by Argentina and Spain during the summer season. While various countries have asserted sovereignty, it is still administered under the Antarctic Treaty System, meaning it is under no control.
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Storia delle eruzioni
27 registrateGlossarioCronologia dettagliata
- 1987VEI ?Metodo non indicato1987-07-23 – fine sconosciuta
- 1972VEI ?Metodo non indicato1972-09-29 – 1972-09-29
- 1970VEI 3Osservata1970-08-12 – fine sconosciutaNE of Telefon Bay
- 1969VEI 3Osservata1969-02-21 – 1969-03-16West side of Mount Pond
- 1967VEI 3Osservata1967-12-04 – 1967-12-07North side (Telefon Bay, Yelcho I)
- 1912 (±5 anni)VEI 3Osservata1912-07-02 – fine sconosciutaSW part of island
- 1871 (±40 anni)VEI ?Stima geologica1871-07-02 – fine sconosciutaSE side of caldera bay (Kroner Lake)
- 1842VEI 2Osservata1842-02-16 – fine sconosciutaS caldera rim (flanks of Mt Kirkwood)
- 1839VEI ?Metodo non indicato1839-07-02 – fine sconosciutaCrater Lake, Mt. Kirkwood area
- 1827 (±2 anni)VEI ?Osservata1827-07-02 – fine sconosciutaNE side caldera bay (Pendulum Cove)
- 1800VEI ?Osservata1800-07-02 – fine sconosciutaN side caldera bay (near Telefon Bay)
- 1641 (±3 anni)VEI ?Stima geologica1641 – fine sconosciuta
- 1500VEI ?Stima geologica1500 – fine sconosciuta
- 1200VEI ?Stima geologica1200 – fine sconosciuta
- 900VEI ?Stima geologica900 – fine sconosciuta
- 600VEI ?Stima geologica600 – fine sconosciuta
- 100VEI ?Stima geologica100 – fine sconosciuta
- 100 a.C.VEI ?Stima geologica100 a.C. – fine sconosciuta
- 250 a.C.VEI ?Stima geologica250 a.C. – fine sconosciuta
- 550 a.C.VEI ?Stima geologica550 a.C. – fine sconosciuta
- 700 a.C.VEI ?Stima geologica700 a.C. – fine sconosciuta
- 750 a.C.VEI ?Stima geologica750 a.C. – fine sconosciuta
- 800 a.C.VEI ?Stima geologica800 a.C. – fine sconosciuta
- 1550 a.C.VEI ?Stima geologica1550 a.C. – fine sconosciuta
- 2750 a.C.VEI ?Stima geologica2750 a.C. – fine sconosciuta
- 3250 a.C.VEI ?Stima geologica3250 a.C. – fine sconosciuta
- 6750 a.C.VEI ?Stima geologica6750 a.C. – fine sconosciuta
Vulcani nelle vicinanze
Link esterni
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