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Summary of world-wide volcanic activity 13-19 June 2012mardi juin 26, 2012 18:33 | AUTEUR : T
The new Smithsonian / USGS Weekly Volcanic Activity Report is summarized as follows: -- new activity --- Fuego (Guatemala): strong strombolian activity, active lava flows Galeras (Colombia): increased seismic activity, ash and gas emissions, plumes up to 2.4 km height Manam (Papua New Guinea): vulcanian explosions, occasional pyroclastic flows Nevado del Ruiz (Colombia): important SO2 emission and ash venting Sirung (Pantar Island, Indonesia): steaming and elevated seismicity --- ongoing activity --- Batu Tara (Sunda Islands, Indonesia): occasional ash eruptions reaching 2-3 km altitude Cleveland (Aleutians): growing lava dome, occasional strong explosions ejecting ash to 10 km altitude Dukono (Halmahera Island, Indonesia): occasional ash eruptions reaching 3 km altitude Karmysky (Kamchatka): thermal anomaly visible on satellite data, occasional weak explosions Kilauea (Hawaii): lava lakes in Pu'u 'O'o and Halema'uma'u crater, lava flows 1.1 km from coast Popocatépetl (Mexico): incandescence at summit crater, sporadic weak to moderate explosions, steam and ash emissions Sakurajima (Japan): 1-2 moderate to strong explosions per day, plumes up to 3-4 km Shiveluch (Kamchatka): growing lava dome, occasional strong explosions ejecting ash to 8-9 km altitude Tungurahua (Ecuador): occasonal ash explosions producing 2-3 km tall plumes ---
Source: Actualités précédentesmardi, juin 26, 2012
A new eruption might be under way at El Hierro (Canary Islands, Spain). Following several weaker swarms in the past weeks, a strong swarm started late on 24 June and increased dramatically to more than 200 earthquakes of M1.5 or more, including volcanic tremor. The quakes locations indicated that magma was moving at depth from N towards the S in a similar way as at the start of the 2011 submarine eruption. Therefore, the possibility of renewed eruptive activity is real. ...
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lundi, juin 18, 2012
New discoveries of petrified trees at the area of Agia Paraskevi show that there has been a dense forest 17 Million years ago on the western part of the island of Lesbos. New excavations under the palaeontologist Prof. Nikos Sourou show about 45 species of trees. Some even in the original position with their roots. In future it is planned to include the new items in the geopark of Lesbos island. The fossils are covered by many meters of pyroclastic material of huge volcanic eruptions that took place in the time around 15-23 Million years. Some of the volcanoes that caused this wonder of nature can be found even today after millions of years of erosion (caldera of Agra, Lepetimnos volcano and other lava domes). ...
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Picture of the Day - VolcanoDiscovery: Aerial view of the eastern part of Santorini with the caldera
mardi, juin 19, 2012
The new Smithsonian / USGS Weekly Volcanic Activity Report is summarized as follows: ...
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