Rincón de la Vieja volcano, Costa Rica: activity updates
Rincón de la Vieja volcano (Costa Rica): phreatic eruption on 18 June 2017
Friday Jun 23, 2017 17:14 PM | BY: T
OVSICORI-UNA reported that on 15 June a diffuse plume of mainly water vapor rose 50 m above Rincón de la Vieja's crater rim. A small hydrothermal explosion from the crater with the highly acidic lake was detected around noon on 18 June.
In a report posted the next day OVSICORI-UNA noted that seismicity was characterized by low-frequency events, volcano-tectonic events, and tremor with intensifying amplitude; the seismic patterns were similar to those that preceded the phreatomagmatic events on 23 May and 11 June, though the recent seismicity was not as energetic.
(Source: Smithsonian / USGS Weekly Volcanic Activity Report 14-20 June 2017)
Wednesday, May 24, 2017
A moderately large phreatic eruption occurred from the crater lake at 10:20 local time on 23 May 2017, producing a plume of steam and ash that rose 500-1000 m as well as a lahar that descended the northern flank. [more]
Tuesday, May 03, 2016
OVSICORI-UNA reported that a moderate hydrothermal explosion occurred at 14:37 local time on 1 May in the volcano's crater lake. The seismic network recorded the explosion for 11 minutes. [more]
Sunday, Apr 03, 2016
A smaoo eruption, probably phreatic, occurred on 30 March, ejecting a small ash plume. [more]
Saturday, Mar 12, 2016
The volcano had a new explosion from its crater lake last Wednesday 8 March. The eruption threw deposits of mud and ash onto the northern side of the crater to up to 120 m distance from the rim and generated a small plume of ash that caused light ash fall in nearby villages in up to 6 km distance to the north. ... [more]
Sunday, Sep 21, 2014
The volcano increased its activity. Since 17 Sep, phreatic explosions have regularly occurred from the main crater which contains an acid lake. Although none was observed directly, at least 6 explosions could be identified by seismic signals. An aerial survey yesterday showed no fresh deposits, which suggests that the eruptions were rather small and did not eject material beyond the lake. ... [more]