Massive eruptions of ash were seen at the Turrialba Volcano, 50 kilometers east of Costa Rica’s capital San Jose, on Thursday local time. /CFP Photo

Enormous plumes of ash spurted from the volcano, putting emergency teams in nearby cities on alert. /CFP Photo

Costa Rica has declared a state of emergency given the potential danger of volcanic tremors. /CFP Photo

"For several days now Turrialba Volcano has had continual eruptions marked by the constant expulsion of ash," the National Emergencies Commission said in a statement. /CFP Photo