A Red Alert was issued for Poás Volcano National Park in Costa Rica on Wednesday, April 23, 2025, after a series of eruptions produced ash plumes reaching up to 4 500 m (15 000 feet) above the crater. Ashfall was reported in several surrounding areas, prompting Orange Alerts in Grecia and Sarchí, and Yellow Alerts in Alajuela, Poás, Naranjo, Río Cuarto, and Zarcero due to increased volcanic hazards.
A sudden explosive eruption took place at the northern part of Costa Rica’s Poas volcano at 08:42 UTC on April 6, 2022.
A hydrothermal eruption, lasting 25 minutes, started at Costa Rica's Poas volcano early September 23, 2019 (UTC). According to the Volcanological and Seismological Observatory of Costa Rica (OVSICORI), the eruption started at 20:59 local time on September 22…
A notable eruption started at Costa Rica's Poas volcano on February 11, 2019, with persistent low-level ash emission and crater incandescence. The eruptive column reached 200 m (650 feet) above the crater or 2 908 m (9 540 feet) above sea level. The eruption…
A strong phreatic eruption took place at Costa Rica's Poas volcano between 00:00 and 01:00 UTC on April 13, 2017 (18:00 and 19:00 local time on April 12), the National University’s Volcanology and Seismology Research Institute (OVSICORI) reported. The…
Increased volcanic activity at Costa Rica's Poas volcano on Sunday, April 9, 2017, forced authorities to evacuate a large group of tourists. The last eruptive activity of this volcano was reported in July 2016. According to the park rangers, the evacuation took…
A strong phreatic eruption occurred at the crater lake of Poas volcano on October 14, 2014. The explosion ejected mud and water more than 200 m into the air. According to first news articles, nobody was hurt, but the visiting areas have been evacuated. Today's erupt
