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Lascar volcano (Chile), activity update - summary of activity over the past months

wo, 6 sep 2006, 17:16

Jorge Clavero, José A. Naranjo (Chilean Geological Survey) and Juan Cayupi (Chilean Emergency Office) sent the following report summarizing Lascar's activity over the past months:

<<Lascar in the Central Andes of Northern Chile started a new eruptive cycle on April 18th 2006, after almost one year of apparent repose (last eruption recorded in May 4th 2005). <br>After one week with several phreatic explosive cycles per day (some lasting up to two hours), reaching up to 3,500 m above the crater, the activity decreased. The ash collected in June around the crater area showed no signs of new magma, in agreement with seismic data (three seismometers were installed for one week, and one for nearly one month to record the seismic activity associated to the explosions). The volcano has continued its activity with several smaller explosions during May, July and August, although much more separated in time (up to several weeks). The last observed explosions occurred on June 12th at 16:00 hrs and August 14th at 18:00 hrs (local time, GMT-4)). The latter lasted for 5 minutes and the plume reached up to 450 m above the crater, and was rapidly dispersed towards the East-Southeast. This unusual long-lasting cycle of phreatic vulcanian explosions of Láscar volcano seems to continue, and efforts from the Chilean Geological Survey (Sernageomin) and the Chilean Emergency Office (Onemi) are under way to install permanent seismometers in the area.
Although no signs of new magma have been recognised so far, ascent of new magma in the future cannot be ruled out.>>

Vorig nieuws
Sat, 29 Jul 2006, 23:17
A set of photos from our recent expediton to Nyiragongo volcano has been posted. The next tour to see this unique volcano and the endangered mountain gorilllas of the Virunga volcanic chain is now set to 21-28 Jan. 2007. Details on this page. ... Lees alle
Mon, 17 Apr 2006, 20:09
Because of the recent interesting volcanic activity at Merapi and Semeru volcano on Java, we point to two tours with open spaces for last-minute individual bookings: ... Lees alle
Fri, 10 Mar 2006, 22:26
Due to lack of participants, we decided to cancel the tour to North Sulawesi and postpone it to 2007. As an interesting alternative, we can offer a special trekking tour in Java and Bali from 5-20 August instead. There are two open spaces available. ... Lees alle
Sat, 4 Mar 2006, 01:47
We hare glad to announce that we can now offer an additional date for the tour on Nisyros island, Greece, this autumn: 6-15 October 2006. Details to the tour are found here.  ... Lees alle
Fri, 24 Feb 2006, 20:07
The dates for the new expedition to Nyiragongo volcano are now set to 19-27 July, 2006. 3 spaces are still available. Details here. ... Lees alle

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