A geologist observes an ash plume rising 400 m above the summit crater of Poás on 25 April 1989. By 19 April, four days before this explosion, the crater lake had disappeared. In May 1989 ash plumes reached 1.5-2 km above the crater.

Photo by Gerardo Soto, 1989 (Instituto Costarricense de Electridad).

This image is made available under the Creative Commons BY-NC 4.0 license terms.

Galleries: Fieldwork | Volcano Monitoring

Keywords: volcano monitoring | volcanologist | ash plume | plume | crater | eruption | explosive eruption | ash | field work

Poás