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Ischia

Complex volcano · Italy · 789m

The Ischia volcanic complex forms a 6 x 9 km island W of the Bay of Naples seen in this International Space Station image. Tectonism has influenced volcanic activity at Ischia, and its high point (the dark-colored area in the center) is a horst (raised fault block) composed of ignimbrite deposits associated with Pleistocene caldera formation. During the Holocene, a series of pumiceous tephras, tuff rings, lava domes, and lava flows were erupted.
The Ischia volcanic complex forms a 6 x 9 km island W of the Bay of Naples seen in this International Space Station image. Tectonism has influenced volcanic activity at Ischia, and its high point (the dark-colored area in the center) is a horst (raised fault block) composed of ignimbrite deposits associated with Pleistocene caldera formation. During the Holocene, a series of pumiceous tephras, tuff rings, lava domes, and lava flows were erupted. · Photo: NASA International Space Station image ISS002-E-8200, 2001 (http://eol.jsc.nasa.gov/). · Wikimedia Commons
Type
Complex volcano
Country
Italy
Region
European Volcanic Regions / Italian Peninsula Volcanic Provinces
Elevation
789m
Coordinates
40.730, 13.897
Last eruption
1302
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Trachyte / Trachydacite
Geological summary

The Ischia volcanic complex forms a rectangular, 6 x 9 km island immediately SW of the Campi Flegrei area at the western side of the Bay of Naples. The eruption of the trachytic Green Tuff ignimbrite about 56,000 years ago was followed by caldera formation. The high point on the island, Monte Epomeo, is a volcanic horst composed of the Green Tuff ignimbrite deposit that was submerged after its eruption and then uplifted. Volcanism on the island has been significantly affected by tectonism that formed a series of horsts and grabens; at least 800 m of uplift has formed as a result of resurgent doming during past 33,000 years. Many small monogenetic volcanoes were formed around the uplifted block. Volcanism during the Holocene produced a series of pumiceous tephras, tuff rings, lava domes, and lava flows, and a major collapse of Mount Epomeo produced a large submarine debris-avalanche deposit. The latest eruption, in 1302 CE, produced a spatter cone and the Arso lava flow, which reached the NE coast.

From Wikipedia

Ischia is a volcanic island in the Tyrrhenian Sea. It lies at the northern end of the Gulf of Naples, about 30 kilometres from the city of Naples. It is the largest of the Phlegrean Islands. Although inhabited since the Bronze Age, as a Greek emporium it was founded in the 8th or 9th century BCE, and known as Πιθηκοῦσαι, Pithekoūsai.

Wikipedia · CC BY-SA · Read full article →

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
7550 BCE~7255 BCE · 1 eruptions · max VEI ?4009 BCE~3714 BCE · 1 eruptions · max VEI ?3714 BCE~3419 BCE · 1 eruptions · max VEI ?3124 BCE~2829 BCE · 1 eruptions · max VEI ?2829 BCE~2534 BCE · 1 eruptions · max VEI ?2534 BCE~2239 BCE · 1 eruptions · max VEI ?1649 BCE~1354 BCE · 1 eruptions · max VEI ?1059 BCE~763 BCE · 1 eruptions · max VEI ?763 BCE~468 BCE · 3 eruptions · max VEI ?468 BCE~173 BCE · 2 eruptions · max VEI ?173 BCE~122 · 5 eruptions · max VEI 3122~417 · 2 eruptions · max VEI ?417~712 · 1 eruptions · max VEI ?712~1007 · 1 eruptions · max VEI ?1007~1302 · 2 eruptions · max VEI ?7550 BCE5485 BCE3124 BCE1059 BCE1007

Detailed timeline

  1. 1302VEI ?Observed
    1302-01-18 – 1302-03
    Arso
  2. 1290VEI ?Geological estimate
    1290 – Ongoing
  3. 820 (±300 yrs)VEI ?Geological estimate
    820 – Ongoing
    Near Arso
  4. 540 (±150 yrs)VEI ?Geological estimate
    540 – Ongoing
    Montagnone-Moschiata area
  5. 295 (±10 yrs)VEI ?Observed
    295 – Ongoing
    Vateliero, Molara-Cava Nocelle, Rotaro
  6. 145VEI ?Observed
    145 – Ongoing
  7. 80 (±1 yrs)VEI ?Observed
    80 – Ongoing
  8. 69VEI ?Geological estimate
    69 – Ongoing
  9. 40 (±75 yrs)VEI 3Geological estimate
    40 – Ongoing
    Near Bosco della Maddalena
  10. 6 BCE (±20 yrs)VEI ?Observed
    BCE 6 – Ongoing
  11. 91 BCEVEI ?Observed
    BCE 91 – Ongoing
  12. 200 BCE (±200 yrs)VEI ?Geological estimate
    BCE 200 – Ongoing
    Ischia Porto (Spiaggia dei Pescatori)
  13. 370 BCE (±150 yrs)VEI ?Geological estimate
    BCE 370 – Ongoing
    Ischia Porto (San Pietro)
  14. 470 BCEVEI ?Observed
    BCE 470 – Ongoing
    Bosco dei Conti and Fondo Ferraro ?
  15. 490 BCE (±150 yrs)VEI ?Geological estimate
    BCE 490 – Ongoing
    Case Balestrieri?, Cava Nocelle?
  16. 700 BCE (±75 yrs)VEI ?Geological estimate
    BCE 700 – Ongoing
    Costa del Lenzuolo
  17. 930 BCE (±150 yrs)VEI ?Geological estimate
    BCE 930 – Ongoing
    SE of Selva del Napolitano
  18. 1480 BCE (±300 yrs)VEI ?Geological estimate
    BCE 1480 – Ongoing
    Castiglione
  19. 2350 BCE (±1400 yrs)VEI ?Geological estimate
    BCE 2350 – Ongoing
    Costa Sparaina
  20. 2700 BCE (±1750 yrs)VEI ?Geological estimate
    BCE 2700 – Ongoing
    Punta della Cannuccia
  21. 3050 BCE (±1000 yrs)VEI ?Geological estimate
    BCE 3050 – Ongoing
    Cantariello
  22. 3580 BCE (±300 yrs)VEI ?Geological estimate
    BCE 3580 – Ongoing
    Submarine SE flank (Secca d'Ischia)
  23. 3880 BCE (±200 yrs)VEI ?Geological estimate
    BCE 3880 – Ongoing
    Zaro, Marecocco, Spiaggia degli Inglesi
  24. 7550 BCE (±2400 yrs)VEI ?Geological estimate
    BCE 7550 – Ongoing
    Selva del Napolitano, Piedmonte

External links

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