Global Volcanism Program | Image GVP-07796
Minor phreatic eruptions took place at Tacaná in February, May, and June 1986. Following a seismic swarm that began the previous day, a moderate phreatic explosion around noon on 8 May created a new 10-m-wide vent and ejected a small amount of fine ash. Vegetation was damaged over an area of 200 x 100 m. Vigorous steam emission was continuing at the time of this 25 June photo. The new vent formed at about 3,600 m elevation on the NE flank.
Photo by Bill Rose, 1986 (Michigan Technological University).