Global Volcanism Program | Image GVP-07506
Fumaroles of the La Primavera geothermal field steam in the foreground along La Azufrera fault, whose trace can be seen in the vertical rock-filled gully in the background. Note the person observing the fault trace at the lower left-center for scale. The geothermal field at La Primavera has been explored by the Mexican Comisión Federal de Electricidad (CFE). Exploratory drilling began in 1980.
Photo by Pat Dobson, 1982 (Lawrence Berkeley National Laboratory).