Located in southeast Costa Rica, Turrialba is a large, densely forested stratovolcano. Three
well-defined craters lie in the upper section of a broad summit depression. Turrialba has been quiet
since a series of explosive eruptions in the 19th century that featured intermittent pyroclastic* flows.
Fumarole activity continues at the summit craters.
Of its three craters, the central one is the deepest and most active, presenting two conic
structures with sulfuric steam and vapors.
OVISCORI-UNA maintains a permanent montioring station at the volcano.