Kolumbo

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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)

Volcan sous-marin Kolumbos (Santorin, Grèce): séisme de magnitude 3,2

mardi, déc. 13, 2011

A 19h22 GMT (21h22 heure locale), un séisme de 3,2 survenu au sous-marin peu connu du volcan Kolumbos ca. 8 km NE de Santorin, l'île, en Grèce. Ceci marque l'un des plus grands événements de ces derniers mois. ... [details]

Kolumbo volcan

Volcan sous-marin -18 m / -60 ft
Grèce, 36.52°N / 25.49°E
Condition actuelle: en sommeil (1 sur 5)

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Dernière mise à jour: 29 juil. 2012
Style éruptif tipique: Explosive
Eruptions du volcan Kolumbo: 1650

Hydrothermal 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.

Derniers séismes proches:

Time	Mag. / Depth	Distance	Location
Sat, 11 May
Sat, 11 May 01:42 UTC	M 1.9 / 14.3 km	1 km	17 Km NNE from Santorini
Sat, 11 May 01:36 UTC	M 1.7 / 12.5 km	3 km	18 Km NNE from Santorini
Thu, 9 May
Thu, 9 May 01:21 UTC	M 2.6 / 26.9 km	31 km	27 Km SSW from Amorgos
Thu, 9 May 00:45 UTC	M 2.2 / 17.7 km	26 km	29 Km SW from Amorgos
Thu, 9 May 00:40 UTC	M 1.9 / 21.5 km	33 km	26 Km SSW from Amorgos

Voir tous

Volcan Kolumbo (ous Kolumbos) is qu'un volcan sous-marin situ8 km au NE de l'le de Santorin DANS la mer ge. Le volcan HNE non elliptique SW-NE, allonge cne 3 km grande AVEC UNE profondeur de 500 m et large de 1,5 km cratre, les parties les plus les hautes de la jante, Qui a lieu 18-15 m sous le Niveau de la mer.
Le plancher du cratre, en Particulier DANS SA party nord, Contains des Nations Unies champion de fumerolles de haute temprature Importante et trs actif.
Le cratre du volcan Kolumbo HNE Une petite caldeira Qui pourrait AVOIR (UA de Dans certaines rgions Moins) formau cours de la Seule connuer du volcan MAIS trs Violente corruption dernire Qui a eu lieu en 1650 AD .

Introduction:

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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