Minor phreatic eruptions ejecting material to heights of several meters were reported in March 1994. Two more phreatic eruptions were reported at the end of April, by which time the crater lake was nearly gone. Intense gas emission in the ensuing months caused health problems and severe economic losses in agricultural areas. Eruptions producing ash plumes that took place on 3 June and 9 July-5 August formed a small new crater. The crater lake (seen here 2 September 1994) returned, and minor phreatic eruptions occurred in October.

Photo by José Enrique Valverde Sanabria, 1994 (courtesy of Eduardo Malavassi, OVSICORA-UNA).

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

Keywords: crater | crater lake | stratigraphy | emissions | gas | tephra | erosion | fumarole | geothermal

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