The National Seismology Network (RSN) reported an eruption of the Turrialba Volcano this August 15 at 7 a.m., the volcano still maintained a passive emission of ash over four hours after the eruption.

The activity was mild with a column of ash that reached close to 300 meters above the active crater; the ash was being dispersed to the Northeast.

Turrialba Volcano had increased its activity since late July, with sporadic eruptions and passive emissions of ash.

The National University’s Volcanology and Seismology Research Institute (OVSICORI), also informed of the activity of the Rincon de la Vieja Volcano in Guanacaste, which registered an eruption on August 14 at 6:28 p.m. the altitude of the column of ash is unknown due to the visibility conditions in the area.

The RSN had warned since early June that changes had been registered in the behavior of the seismic activity in the Rincon de la Vieja Volcano, with an increase in the low frequency seismic activity which are generally related to circulation of hydrothermal or magmatic flows through ducts within the volcano; this pattern has been registered in the past prior to eruptive periods of this volcano. For this reason, precaution is recommended.

Poas Volcano in Alajuela maintains a period of calm with no eruptions registered; this National Park is scheduled to reopen soon.