俄羅斯Shiveluch火山噴發大量的火山灰

俄羅斯Shiveluch火山噴發大量的火山灰，太平洋火環帶的火山活動愈趨頻繁。

September 13, 2011 – KAMCHATKA – A Russian volcano rumbled and spewed a towering ash column on Tuesday, as officials upped threat ratings to a maximum red level. A column of smoke and ash from the volcano Shiveluch in Russia’s Pacific coast Kamchatka peninsula has reached an altitude of 10.3 kilometers and rock slides were likely in progress, officials at Russia’s National Geophysical Service (RNES) told Interfax. The closest town at a distance of 45 kilometers was not in danger, Interfax reported. After a long dormancy ending in 2006, Shiveluch has become one of east Russia’s most active volcanoes. Minor discharges were a frequent occurrence until May 2009, when increasingly tall ash columns thrown up by the volcano became a regular hazard for passing aircraft. The Tuesday upgrade to a red threat level was the first time in 2011 the volcano was at its top danger rating. Shiveluch last catastrophic eruption was in 1956. Experts have differed on whether intensifying activity in recent years could foreshadow another eruption soon

http://www.monstersandcritics.com/news/europe/news/article_1662646.php/Russian-volcano-rumbles-spews-ash

俄羅斯Shiveluch火山噴發大量的火山灰，火山灰噴發的高度達到10.3公里，將有可能對飛過附近的飛機造成危害。目前隨時都有可能大量噴發。

俄羅斯Shiveluch火山位於環太平洋火環帶上，日本上方。目前日本已經有許多火山爆發，美國阿拉斯加也有火山活動並且開始看到火山灰噴發出來，預計未來在環太平洋火環帶上的火山活動都將愈來愈頻繁，甚至很多將有爆發的可能。