Global Volcanism Program | Image GVP-09133
Poás erupted intermittently from June 1987 to June 1990, producing ash plumes such as this one seen on 6 March 1989. Phreatic explosions had resumed from June 1987 until at least October 1988, punctuated by large explosions on 9 April 1988. The crater lake completely disappeared by April 1989, and during May ash plumes reached heights of 1.5-2 km above the crater.
Photo by Gerardo Soto, 1989 (Instituto Costarricense de Electricidad, published in Alvarado, 1989).
This image is made available under the Creative Commons BY-NC 4.0 license terms.