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In late May, 2009, activity decreased and the Alaska Volcano Observatory lowered the alert level. A nearly six-month period of relative quiet at the volcano ended on December 27, 2009, with renewed earthquake swarms. The AVO subsequently raised the alert level, and again warned of the possibility of a more vigorous eruption due to dome collapse ...
The 2009 Tonga undersea volcanic eruption began on 16 March 2009, [5] near the island of Hunga Tonga, approximately 62 kilometres (39 mi) from the Tongan capital of Nukuʻalofa. [6] The volcano is in a highly active volcanic region that represents a portion of the Pacific Ring of Fire .
Still larger were the Icelandic eruptions of Katla (the Eldgjá eruption) circa 934, with 18 km 3 (4 cu mi) of erupted lava, and the Þjórsárhraun eruption of Bárðarbunga circa 6700 BCE, with 25 km 3 (6 cu mi) lava erupted, the latter being the largest effusive eruption in the last 10,000 years. [46]
A.D. 79: Mount Vesuvius, Italy. Mount Vesuvius has erupted eight times in the last 17,000 years, most recently in 1944, but the big one was in A.D. 17. One of the most violent eruptions in history ...
The event greatly alarmed volcanologists and other scientists around the world—if we couldn’t properly predict when a volcano might erupt, how wou We Now Know Why This Deadly Volcano Erupted ...
2009 21 0.4 [62] 3 Mount Redoubt [63] Alaska, United States 2009 20 2009 Mount Redoubt eruptive activity: 4 Kasatochi [64] Alaska, United States 2008 13.7 0.15–0.28 [65] 4 Chaitén [66] Chile 2008 30 0.5–1 [67] 1 [68] The town of Chaitén, located about 10 km southwest of the eruption site, was blanketed with ash. About 4,000 people who ...
The 1831 eruption caused global cooling of about 1C that triggered crop failures and famines worldwide
2021 Semeru eruption: 64 Mount Merapi: 2 Indonesia: 1994 [35] 63 Mount Ontake: 3 Japan: 2014 2014 Mount Ontake eruption: 58 Sakurajima: 4 Japan: 1914 [36] 57 Mount St. Helens: 5 United States: 1980 1980 eruption of Mount St. Helens: 56 Mount Etna: 2 Italy: 1843 [6] 56 La Soufrière: 4 Saint Vincent and the Grenadines: 1812 [37] 50 Mount Usu: 4 ...