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Post by hanabanana on Aug 28, 2012 13:45:00 GMT 1
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Post by hanabanana on Aug 31, 2012 21:17:43 GMT 1
www.peruthisweek.com/news-2716-Peru%E2%80%99s-El-Misti-Volcano-is-active-says-IGP/Peru's El Misti Volcano is active - Peruvian geologists have revealed that recent activity at El Misti signals that the volcano is active. Last Thursday researchers found that El Misti – located 17km outside the city of Arequipa – had recently recorded the highest amount of seismic activity than in the past five years. 224 earthquakes were registered at El Misti - an event known as an earthquake swarm - and which signaled that the volcano was no longer dormant. El Misti experienced 143 volcano tectonic earthquakes, which were caused by the fracture of rock inside the volcano, due to sudden changes in pressure and temperature. Despite the recent increase in activity, there were still no conditions for an eruption to occur at El Misti, which last erupted sometime between 1450 and 1470. For an eruption to happen, El Misti would have to experience continued earthquakes, which “would have to occur after long-term movements of magma, and causing these earthquakes known as tremors, with lava.”
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Post by hanabanana on Aug 31, 2012 21:32:38 GMT 1
www.wired.com/wiredscience/volcano-webcams-of-the-world/www.therepublic.com/view/story/4d2b33bdd4fa41a3b4183a589e261ea0/AK--Alaska-VolcanoEarthquake clusters detected at remote Alaska volcano in western Aleutian Islands, but no eruption noted. The quakes began Wednesday evening at Little Sitkin Volcano and were continuing as of Thursday morning. No eruption has been detected. There is no direct link to the swarm of earthquakes at Little Sitkin and a cluster of quakes that shook California's Imperial County earlier this week. Little Sitkin is located on an uninhabited island and is far from any populated areas. The seismic activity is UNUSUAL for Little Sitkin, whose last eruption possibly in the early 1900s is questionable. The concern about an eruption would be the possible threat posed to aircraft.
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Post by hanabanana on Sept 6, 2012 10:42:20 GMT 1
media.brisbanetimes.com.au/national/selections/volcano-erupts-in-guatemala-3610439.htmlVideo - Volcano erupts in Guatemala - The Fuego volcano, one of Central America's most-active volcanoes, resumed activity shooting lava and columns of ash into the air on Monday. www.sacbee.com/2012/09/04/4784874/indonesia-warns-of-eruption-on.htmlIndonesia warns of eruption on Anak Krakatau isle - Indonesia has warned tourists and fishermen to stay from Anak Krakatau after a minor eruption on the volcanic island over the weekend. The peak in the Sunda Strait shot volcanic materials and ash up to 400 meters (1,300 feet). Wind carried the dust about 80 kilometers (50 miles) west to Banda Lampung in southern Sumatra. By Tuesday, glowing material fell just around the slopes and volcanic activity decreased. Anak Krakatau, or "Child of Krakatau," rose from the sea in 1930 due to same tectonic forces that caused the 1883 Krakatau eruption that killed some 36,000 people.
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Post by hanabanana on Sept 10, 2012 13:39:01 GMT 1
www.google.com/url?sa=X&q=http://www.huffingtonpost.com/2012/09/09/san-cristobal-eruption-nicaragua-volcano_n_1869029.html&ct=ga&cad=CAEQAhgAIAAoATABOAFAufK0ggVIAVAAWABiAmVu&cd=JSvfxkmjEBA&usg=AFQjCNHP0CRoTPhvAx8mmXr_CKBL_wQyaANicaragua - The country's largest volcano, San Cristobal, emited smoke and ash after an eruption on Saturday, forcing the evacuation of 3,000 people living in nine nearby communities. Activity in the volcano calmed a day after three loud explosions were accompanied by the huge eruption of ash and gas that led officials to evacuate people. San Cristobal volcano is about 95 miles north of the capital Managua in the country's volcano-dotted northwest. The explosions are not considered as the start of an eruptive phase. www.ticotimes.net/Current-Edition/News-Briefs/Nicaraguan-officials-on-alert-for-seismic-activity_Friday-September-07-2012The Apoyeque Volcano, located northwest of the capital, was calm Friday, but officials continued monitoring it for volcanic tremors. The agency registered 21 low-intensity volcano-related tremors between Thursday afternoon and Friday morning, prompting the government to issue a green advisory alert. Seismic activity near the volcano, located 10 kilometers northwest of Managua, “decreased Friday morning, but it doesn’t mean that it has disappeared." The tremors began after the magitude-7.6 earthquake hit neighboring Costa Rica on Wednesday. A group of experts will travel to the volcano to investigate the earthquakes causes. www.google.com/url?sa=X&q=http://www.costaricantimes.com/4-costa-rica-volcanoes-being-closely-watched-after-earthquake/5030&ct=ga&cad=CAEQAhgAIAAoATAIOAhAs46tggVIAVAAWABiAmVu&cd=hCult9dX0Ho&usg=AFQjCNGC7QBeQczhw7tifNCmLa2EPN1OBwFour Costa Rica volcanoes being closely watched following the 7.6 earthquake which hit on Wednesday - Arenal (Alajuela), Rincon de la Vieja (Guanacaste), Turrialba (Cartago) and Poás (Alajuela). At Arenal, locals reported a noise characteristic of rolling boulders. At the Turrialba volcano there was reported a slight collapse, but at “the bottom” of the colossus, rather than volcanic structure. “The emission level is similar to what was observed previously." Scientists have not yet visited the Rincon de la Vieja, but have received reports from residents who live about 17 miles west of the volcano, who claim that the water which is normally crystalline has a milky consistency apparently mixed with sulfur. “He also mentioned alleged cracks opened in the north, but we have not confirmed. We also know that, from time to time, there looms a steam plume. That happens from days before the earthquake.” Guatemala's Fire volcano spewed ash and lava last Monday. Lava flowed for almost a mile down the slopes of Fuego volcano during a 28-hour eruption near Antigua. One of Central America's most active volcanoes, Fuego began spewing lava and plumes of ash on Monday near Guatemala's colonial-era capital of Antigua. www.google.com/url?sa=X&q=http://www.earthweek.com/2012/ew120907/ew120907d.html&ct=ga&cad=CAEQAhgAIAAoATACOAJAtOunggVIAVAAWABiAmVu&cd=qntrKuqj7Ck&usg=AFQjCNGtQLgIsZ3HpyQFfRqnOmQCOytW4wJapan - Pressure Building On Fuji Volcano's Magma Chamber. Mt. Fuji has already been classified as an active volcano, but scientists revealed new readings that show that the current pressure is at 1.6 megapascals, nearly 16 times higher than that required to trigger an eruption (0.1 megapascals). There are lots of examples where volcanoes have erupted after a nearby magnitude 9 earthquake. That's what happened after the Kamchatka, Chile and Sumatra quakes. www.businessweek.com/news/2012-09-09/santorini-volcano-fills-up-with-magma-most-since-last-eruptionGreek Santorini Volcano Runs Risk of First Eruption in 70 Years - Greece’s Santorini Volcano, the site of an eruption 3,600 years ago that wiped out Minoan settlements on the island and in Crete, has begun to fill with molten rock, expanding the most since its last eruption from 1939 to 1941. Santorini was devastated by the Minoan eruption. The chamber of liquid rock, or magma, beneath the volcano expanded by 10 million to 20 million cubic meters from January 2011 to April this year. That’s as much as 15 times the size of London’s Olympic Stadium. While the data don’t suggest an imminent eruption, it can’t be ruled out. Studies at the volcano “strongly suggest that the present episode of volcanic inflation is the only significant one since the eruption of 1939-1941, or shortly thereafter. It would be unwise to assume that the present state of unrest will not end in an eruption.” The expansion of liquid rock has pushed Santorini up by 8 to 14 centimeters (3 to 5.5 inches). Santorini alternates between explosive eruptions that occur every 10,000 to 30,000 years and smaller, more frequent dome- forming eruptions separated by as little as 14 years. The volcano had its last “significant” eruption about 70 years ago. “If the present rate of inflation were to continue for a small number of years, the intruded volume would be equivalent to the volumes of previous eruptions." The volume of molten rock that’s accumulated since the start of 2011 amounts to as much as 50 percent of the amount expelled during Santorini’s smaller eruptions. The increased activity began with three small earthquakes in January 2011 and has subsided since April. “We’re in a situation which is anomalous relative to the past but it still has nothing to do with a volcano that is near eruption.”
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