An ash plume erupts from the Irazú summit crater on 14 April 1964, about midway through a major explosive eruption that began in 1963. The ash-covered plateau to the left is Playa Hermosa, an older buried crater. The road to the summit is to the lower left. Heavy ashfall from the 1963-65 eruption was deposited across the Central Valley and caused major economic disruption.

Photo by U.S. Geological Survey, 1964.

This image is made available as a Public Domain Work, but proper attribution is appreciated.

Keywords: crater | tephra | ash | ash plume | plume | vent | explosive eruption | eruption

Irazú