Global Volcanism Program | Image GVP-04309
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.