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New sporadic eruptions at Rincón de la Vieja volcano, Costa Rica
Thursday Mar 01, 2012 16:29 PM | BY: T
Seismic recording of a phreatic explosion at 00:16 local time on 19 February 2012
New phreatic explosions were recorded at Rincón de la Vieja volcano in northern Costa Rica.
On 23 February, residents in Guachipelin (11 km to the SW) woke up to hear explosion sounds between 0400 and 0430 local time. Seismic recordings showed signals typical for explosions at the same time, although other residents in other areas did not hear any eruption.
Similar seismic signals were detected on 19 Feb at 00:16 and on 20 Feb at 00:46 local time, suggesting that smaller explosions occurred then as well.
The explosions are believed to be phreatic in origin, i.e. caused by explosion of over heated ground water with no fresh magma ejected, and continue a series of similar sporadic eruptions that occurred in September and October 2011.
Links / Sources:
Thursday, Mar 01, 2012
The new Smithsonian / USGS Weekly Volcanic Activity Report is out. It includes: ...
Thursday, Feb 23, 2012
The new Smithsonian / USGS Weekly Volcanic Activity Report is out. Updates include: ...
Saturday, Feb 18, 2012
Photos from our last tour to Guatemala (Jan 2012) - Pacaya, Atitlan, Santiaguito and Fuego volcano are now online! The next tours to Guatemala
: 8-21 Dec 2012 and 22 Dec 12 - 4 Jan 13.
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Monthy earthquake reports
: For each month since July 2012, we publish a summary of quake activity world-wide: find the list of largest quake, a map showing all significant quakes as well as detailed statistics on seismic activity during this time.
Small spherical balls of volcanic ash that form from a wet nucleus falling through a volcanic ash cloud.