San Cristobal volcano news & activity updates
San Cristobal volcano (Nicaragua): new ash eruptions
Sunday Apr 24, 2016 16:45 PM | BY: T
Ash plume from San Cristobal's eruption last Friday (INETER)The volcano had a series of new explosive eruptions on Friday, producing ash plumes that rose up to approx. 2 km above the summit crater, drifted south and caused moderate ash fall in areas up to 10-15 km south and southeast of the volcano, including Las Brisas, Santa Narcisa, and Chichigalpa town.
The new series of eruptions began on 22 April around 10:20 local time with a first explosion, followed immediately by a stronger one (image). Weaker explosions followed intermittently throughout the day, but activity seems to have faded again as of today.
Whether these eruptions were caused by superficial steam explosions (phreatic activity) or involved new magma that has risen inside the volcano's conduit is unknown at the moment (without analysis of the ash and seismic and other parameters).
In any case, the volcano has been at elevated unrest for some time and might continue to do so for a while: unconfirmed minor explosions seem to have occurred earlier this year in February and similar, more significant explosions took place in March and June last year (2015).
Wednesday, Jun 10, 2015
About 41 gas explosions occurred at San Cristóbal between 13:54 and 16:25 local time on 6 June. ... [more]
Monday, Mar 09, 2015
Two explosions occurred last Thursday afternoon, producing moderately strong ash emissions of a few hundred meters height. ... [more]
Monday, Jul 21, 2014
A series of small explosive eruptions took place at the volcano this Sunday (20 Jul). ... [more]
Saturday, Apr 12, 2014
A small eruption probably occurred last evening. VAAC Washington issued an alert against a possible ash plume at 8,000 ft (2.4 km) altitude drifting west of the volcano. ... [more]
Thursday, Feb 06, 2014
A series of small, probably phreatic explosions occurred at the volcano's summit crater early on Tuesday. INETER indicated the activity took place between 6:41 - 8:50 local time and consisted of at least 2 explosions, which generated a small steam and ash plume rising to about 200 m height. ... [more]