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Kolumbo volcan

Mise à jour: 3 déc.. 2022 01:22 GMT -
Volcan sous-marin -18 m / -60 ft
Grèce, 36.52°N / 25.49°E
Condition actuelle: normal / en sommeil (1 sur 5)
Last update: 20 avril 2021
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.
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.

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.

Montrer carte interactive
Style éruptif tipique: explosive
Eruptions du volcan Kolumbo: 1650

Derniers séismes proches

HeureMag. / ProfondeurDistance/Lieu
vendredi, 2 décembre 2022 GMT (1 séisme)
2 déc. 2022 05:16 (GMT +2) (2 déc.. 2022 03:16 GMT)
2.5

10 km
19 km (12 mi)
Mer Égée, 13 km au sud de Ios, Nomos Kykladon, South Aegean, Grèce
mercredi, 30 novembre 2022 GMT (3 séismes)
30 nov. 2022 22:39 (GMT +2) (30 nov.. 2022 20:39 GMT)
2.4

7.6 km
28 km (17 mi)
Mer Égée, 38 km au nord-est de Oia, Nomos Kykladon, South Aegean, Grèce
30 nov. 2022 05:15 (GMT +2) (30 nov.. 2022 03:15 GMT)
2.4

10 km
25 km (16 mi)
Mer Égée, 21 km à l'est de Ios, Nomos Kykladon, South Aegean, Grèce
30 nov. 2022 05:15 (GMT +2) (30 nov.. 2022 03:15 GMT)
2.3

10 km
33 km (21 mi)
Mer Égée, 45 km au nord-est de Oia, Nomos Kykladon, South Aegean, Grèce

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)
- Follow Dr. Robert Ballard and his team as they explore the ocean on the E/V Nautilus


See also: Sentinel hub | Landsat 8 | NASA FIRMS
mar., 20 avril 2021, 18:13

Moderate earthquake near undersea volcano beside Santorini, Greece. Should we worry?

This morning's earthquake near Kolumbo volcano offshore Santorini
This morning, a magnitude 4.0 earthquake occurred 10 km northeast of Santorini Island. The quake hit at 11.21 am local time. It was felt by many people on Santorini, especially in the northern part of the island in the town of Oia, mostly as weak shaking that lasted a few seconds. ... Read all
mar., 13 déc. 2011, 22:20

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

Carte des séismes récents dessous de Santorin, en montrant l'événement 3,2 à Kolumbos volcan de Santorin NE
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. ... Read all
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)
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