An eruption occurred at Lokon volcano, Indonesia on 1st May 2012. The eruption occurred at 11:55 am, local time and was accompanied by ashfall over a radius of 2.5 km from Tompaluan crater.
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A great earthquake (magnitude 8.6) hit off the coast of Aceh, Indonesia on 11th April 2012. The epicentre was 434 km SW of Banda Aceh, and the focus was at a depth of 22 km. A tsunami warning was issued for countries surrounding the Indian Ocean. Earthquakes of this magnitude have the potential to affect volcanoes within a 700 km radius. This includes Toba, Sinabung, and Sibayak. A magnitude 8.2 aftershock occurred 2 hours after the great earthquake.
Volcanoes of Indonesia…
Tags: indonesia
A paroxysm occurred at SE crater of Mt Etna volcano on 18th March 2012. This was the 22nd paroxysm in a series which began in January 2011. The eruption consisted of a lava fountain with steam and tephra several kilometres high. Lava flowed into the Valle del Bove. The paroxysm lasted 2 hours.
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A seismic swarm continues on the Big island of Hawaii between Kilauea and Mauna Loa volcanoes. The Ka`oiki seismic swarm began on 21st February 2012 at a location 5km NW of Halemaumau crater. Between 21-24th February there were more than 100 earthquakes associated with the swarm. Between 23-24 February there were 74 earthquakes in the swarm, with two over magnitude 4. The earthquakes were felt at the Hawaii volcano observatory where books fell off the shelves. Minor damage occurred at residences in Volcano Golf Course subdivision, located about 3 km from the earthquake epicentre. This area experienced previous seismic swarms in 1990, 1993, 1997, and 2006, which lasted up to several weeks.
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A paroxysmal eruption occurred at SE crater of Mt Etna volcano on 9th February 2012. The eruption came after 12 days of moderate strombolian activity. The paroxysm lasted for 5 hours. A lava flow reached the Valle del Bove and stopped before reaching the bottom of the valley.
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Activity has increased at Semeru volcano, Indonesia. The volcano has been on reduced level 2 alert since 16th July 2009. Eruptions were observed at the volcano on 9,14, and 17 June 2011. Activity resumed at the end of December 2011. Between 29th December 2011 and 15th January 2012 there were eight explosions at Jonggring Seloko crater, sending ash up to 600 m high. Incandescent fallout was observed 200 m radius from the crater. On 2nd February 2012 a pyroclastic flow reached 2.5 km from the crater. The alert status at Semeru volcano was raised to Level 3 (out of a maximum 4) on 3rd February 2012. A 4 km exclusion zone has been placed on the SE slopes of the volcano where pyroclastic flows occur. Climbers are advised to remain at least 1 km from Jonggring Seloko crater.
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A glacial outburst occurred at Grimsvotn volcano in Iceland on 29th January 2012. High snowfall was followed by heavy rain and elevated temperatures. This caused caused snow to melt, damaging parts of the Ring Road between Núpsvötn and Gígjukvísl in Skeiðarársandur, as well as to the east of Gígjukvísl. No eruption occurred at the volcano.
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A magnitude 5.0 earthquake hit Kilauea volcano on Sunday 22nd January 2012 (local time). The earthquake was shallow and had a focus depth of 8 km. The epicentre was located about 6 km south of Pu’u O’o crater. The earthquake was preceded by one minute by a magnitude 4.1 earthquake.
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The current eruption of Kilauea volcano has entered its 29th year. A summit lava lake is located in a 150 m wide pit in Halemaumau crater. The surface of the lava lake varies from a depth of 70-150 m. The vent has been active since an explosion on 19th March 2008. Eruptions continue on the east rift zone and have been continuing since 3rd January 1983. Lava flows are currently active 3 km SE of Pu’u O’o crater. On 6th January 2012 sulphur dioxide emission was 150 tonnes per day.
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Eruptions continue at Puyehue volcano in Chile. On 13th January the airport at Bariloche in Argentina reopened to flights for the first time since the eruption of Puyehue on 5th June 2011. Ashfall caused the closure of the airport again on 16th January 2012.
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