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Zufallsfotos
Map of the Kolumbo submarine crater and other submarine cones on the north-east trending Kolumbo volcano-tectonic rift. Figure courtesy of Haraldur Sigurdsson, Steven Carey, Matina Alexandir and Katy Croff. (from: oceanexplorer.noaa.gov/explorations/06blacksea/logs/summary_thera/summary_thera.html)
Map of the Kolumbo submarine crater and other submarine cones on the north-east trending Kolumbo volcano-tectonic rift. Figure courtesy of Haraldur Sigurdsson, Steven Carey, Matina Alexandir and Katy Croff. (from: oceanexplorer.noaa.gov/explorations/06blacksea/logs/summary_thera/summary_thera.html)
Karte von Jüngsten Erdbeben Unter Santorini, Zeigen Das 3.2 Ereignis bin Kolumbos Vulkan NE von Santorini
Dienstag, Dez 13, 2011
Um 19 h 22 GMT (21 h 22 Ortszeit) Ereignete Sich Ein 3,2 Erdbeben Auf der Wenig Bekannte Unterseeischer Vulkan Kolumbos ca. 8 km Nordöstlich von Santorini, Island, Griechenland. Dies ist Eines der Größten Ereignisse in Den Letzten Monaten. ... [mehr]
 

Kolumbo Vulkan

submarine volcano -18 m / -60 ft
Griechenland, 36.52°N / 25.49°E
Aktueller Status: ruhend (1 von 5) | Reports
Kolumbo Vulkan-B cher
Last update: 3 Jul 2013
Typische Aktivität: explosive
Ausbrüche des Kolumbo: 1650Hydrothermal vents occur when sea water enters the crust and comes in contact with the volcano's magma chamber. The hot fluid becomes enriched with minerals and then emerges through the vent; when it comes in contact with the colder seawater, its minerals are deposited and create mounds and 'chimneys'. Cyanobacteria use the hot water and minerals as an energy source through a process called chemosynthesis; this vent is covered with red, white, and black bacterial mats. Image taken by the ROV Hercules developed by the Institute for Exploration at Kolumbo underwater volcano, located northeast of Santorini in the Aegean Sea. Image courtesy of the Institute for Exploration, the University of Rhode Island (URI) Graduate School of Oceanography (GSO), and the URI Institute for Archaeological Oceanography.
UhrzeitMag. / TiefeDistanceOrt
Sun, 19 Aug
Sun, 19 Aug 05:46 UTCM 4.9 / 114 km45 kmDODECANESE ISLANDS, GREECE
Kolumbo (or Kolumbos) volcano is an active submarine volcano located 8 km NE of Santorini Island in the Aegean Sea. The volcano forms an elliptical SW-NE elongated 3 km wide cone with a 500 m deep and 1.5 km wide crater, whose rim's highest parts rise to 18-15 m beneath sea level.
The crater floor, in particular in its northern part, contains a large and very active high-temperature fumarole field.
The crater of Kolumbo volcano is a small caldera which could have (at least in parts) formed during the volcano's only known, but very violent last eruption which occurred in 1650 AD.

Beschreibung:

The large hydrothermal field in the northern part of the caldera at about 500 m depth contains a massive Kuroko-style sulfide deposit. Only few such deposits are known world-wide and they are of great interest, especially because of the typically high content of gold and silver in the sulfides. In 2010, the exploration Vessel (E/V) Nautilus discovered steep, up to 6 m high chimneys of sulfides above one of the vents.
1650 eruption of Kolumbo volcano
The 1650 eruption was a very explosive event and ejected pumice and ash as far as Turkey, and produced pyroclastic flows that killed about 70 people on Santorini. During the eruption, it constructed a temporary island (hence it's name Kolumbo, in Greece "swimming"). A tsunami occurred as well, probably during the collapse of the cone. It caused damage on nearby islands up to 150 km and invaded the flat coastal areas especially on the eastern side of Santorini, where ruins from Roman times were uncovered. The eruption also caused damage killed a great number of livestock because of poisonous gasses, mainly H2S.

Links:
- Thera 2006 Expedition Summary (NOAA Ocean Explorer)
- Special Volume of Oceanography(pdf)
- <linkhttp://www.nautiluslive.org/>Follow Dr. Robert Ballard and his team as
they explore the ocean on the E/V Nautilus


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