Mud pots boil in this 1978 view of the San Jacinto thermal area at El Salvador's Telica volcanic complex. The alignment of fumaroles and mud pots suggests an underlying fault running NNE. Magmatic steam and gases have been emitted from the thermal area for many years at a fairly constant rate.
This aerial view on July 1987 looks almost directly down into the double summit crater of Telica volcano in Nicaragua. An older shallower crater is located on the SW side (top). Steam rises from fumaroles in the NE crater (bottom), the source of recent eruptions. The steep-walled crater is 120 m deep. Ash from frequent historical eruptions keeps the outer slopes of the cone unvegetated.