Actualité volcanique, Articles de fond sur étude de volcan, tectonique, récits et photos de voyage
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Seven years ago, began a sudden and powerful eruption, described VEI 4 on Okmok volcano's caldera in the center of the Aleutian arc. On 12 July 2008, the eruptive activity began just a few hours after a subtle increase in seismicity, followed by a short...
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Tambora, the caldera - Doc. Nasa 03.06.2009 To complete the serie on the Tambora, it is necessary to examine its evolution before and after the eruption of 1815. The formation of the stratovolcano: Based on the revelations of the bicentennial eruption...
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The eruption of Tambora did not leave only victims ... Volcanic emissions affect the climate, and are also responsible for optical phenomena: that veil of aerosols, mainly sulfur dioxide / sulfuric acid, can change the colors of the sky at sunset. "Chichester...
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The effects were overall ... "the year without summer" The eruption released a huge volume of sulphate aerosols, estimated at 175 trillion pounds or {175.1018 - Source E.Klemetti - A trillion is equal to one million to the third power ie a million million...
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The "direct" effects of the eruption of 1815 : It's estimated that thousands of people died from the direct effects in the four months following the eruption. Important pyroclastic flows, toxic gas clouds, and tsunamis are responsible of the first victims...
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There are two hundred years, Sumbawa, an island in the group of the Lesser Sunda islands in the Indonesian archipelago, was hit by one of the largest eruptions in the modern times ... The Tambora, this large stratovolcano that forms the peninsula Sanggar,...
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Based on satellite imagery, the VAAC Tokyo reported on November 20, 2013 / 7:17 UTC that a surtseyan eruption starts ( from an estimated depth of -50 m ) , feeding a plume from a height of 600 meters , emerging about 500 meters south of Nishino -shima...
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St. Helens - explosion in the crater on October 1, 2004 / 12:16 PDT. - Photo John Pallister / USGS In late September, an anniversary at St. Helens : the resumption of the volcanic activity after the eruptive crisis of 1980-1986 . On September 23, 2004...
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The eruption of the Capelinhos 1957-1958: After 12 days of earthquakes, on September 23, 1957 , around 6:30 , the sea surface begins to boil , and vapors are emitted one kilometer NW of the lighthouse. Three days later, the activity increases : black...
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Japanese and Salvadorans anthropologists found three skeletons, dating from 1,600 years, in the site of Nueva Esperanza , located 70 kilometers southeast of the capital San Salvador. The bones match those of two adults 25 to 35 years , and a child from...
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