Those expulsions generated a gas plume of about 3,000 meters above the volcano, according to the report.
Although they did not generate lahars, eruptions have almost no associated seismic signal, so they could be assimilated to exhalations, the OVSICORI argued.
The volcano shows frequent eruptions of low energy but they are capable of triggering a very high gas plume and its activity level is three; so experts need to be precautionary so far, the briefing revealed.
The Rincon de la Vieja volcano is a stratus-volcano located in northwestern Costa Rica, in the canton Liberia municipality in the northern Guanacaste province.
Having a height of 1,895 meters above sea level belongs to the Rincon de la Vieja National Park, which is part of the Guanacaste Conservation Area (ACG) that turned out a World Heritage Site by the United Nations Educational, Scientific and Cultural Organization in 1999.
ef/omr/rgh/alb