Activity has increased at Anak Krakatau volcano in Indonesia. Between 19-23 March 2009, an average of 6 shallow volcanic earthquakes were measured per day, compared to 2 per day over the past year. On 24th March, 31 shallow volcanic earthquakes were measured, and 62 earthquakes on 25th March, when visual observations showed white-gray emissions rising [...]
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Dome growth continues at Chaiten volcano in Chile. Between 17-23 March 2009, the lava dome at Chaiten produced constant degassing and release of water vapor, and varying amounts of ash. Gravitational collapse occurred in unstable areas. Dome growth is occurring mainly in the centre, which has formed a tall, hot and unstable spine. Ash emissions [...]
Seismic activity increased markedly at Redoubt volcano between 23-25 January 2009. Tremor became sustained and its amplitude increased. Aviation Color Code was increased to ORANGE. A burst of volcanic tremor occurred at Redoubt volcano, Alaska on Thursday 5th February 2009 at 11:18 am (local time). The tremor lasted 4 minutes and was the most intense [...]
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A major earthquake (Mag 7.6) hit Tonga on Friday 20th March 2009 at 06:17 hr, local time. The earthquake epicentre was located 280 km SSE of Hunga Tonga-Hunga Ha’apai Volcano, which began an undersea eruption three days ago. Sea level readings confirm that a tsunami was generated. The tsunami may have been destructive along coastlines [...]
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An undersea eruption occurred west of the islands of Hunga Tonga and Hunga Ha’apai in Tonga. The eruption was visible from Nuku’alofa, the capital of Tonga. Steam and ash was emitted more than 1 km high. Residents said the steam and ash column first appeared on Monday morning, after a series of sharp earthquakes were [...]
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Galeras volcano in Colombia erupted on Friday 13th March (local time). forcing the evacuation of 3000 people. The explosive eruption occurred at 3:55 pm during a period of heavy rain and cloud which prevented visual observations. An eruption plume reached a height of 8 km above the summit, and drifted northwest. The seismic energy released [...]
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Activity has decreased at Semeru volcano in Indonesia, but scientists have warned this may be a dangerous situation. Volcanologists from Indonesian Centre of Volcanology and Geology have advised residents living near Semeru volcano to remain aware of eruptions, despite signs that volcanic activity is receding. Eruptions have decreased from 63 on 8th March, 58 on [...]
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Increased activity has been reported at Semeru volcano in Indonesia. Between 6th February and 4th March 2009 there were 873 explosion earthquakes registered, with an average of 34 events per day. On 5th March there was one period of tremor recorded. On 6th March one episode of tremor was recorded accompanied by booming sounds which [...]
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