Global Volcanism Program | Image GVP-08625
A lake occupies one of the summit craters of Irazú, one of Costa Rica's most active volcanoes. Irazú rises to 3432 m immediately east of the capital city of San José and is the country's highest volcano. This crater lake (seen here from the southern crater rim) has been the source of many historical eruptions. The first well documented historical eruption of Irazú occurred in 1723, and frequent explosive eruptions have occurred since. Ashfall from its last major eruption during 1963-65 caused significant disruption to San José and surrounding areas.
Photo by José Enrique Valverde Sanabria, 1996 (courtesy of Eduardo Malavassi, OVSICORI-UNA).