Global Volcanism Program | Image GVP-04320
An eruption plume rising above the summit of Irazú volcano is seen in March 1963 from the old San José airport. Eruptions during 1963-65 were among the largest in historical time from Irazú. Intermittent mild-to-moderate explosive activity produced heavy ashfall that severely affected agricultural areas and caused economic disruption. The largest explosions took place on March 13 and July 3, 1963, January 14, April 14, and July 6, 1964, and January 31, 1965.
Copyrighted photo by Dick Stoiber, 1963 (Dartmouth College).