Global Volcanism Program | Image GVP-07510
Los Azufres goethermal field has been producing electricity since 1982. A 5 MW power plant is located at well AZ-6, shown here, which descends to a depth of 900 m. The well is located in the southern (Tejamaniles) section of the geothermal field. Surface exposures here consist of the roughly 1-million-year-old Agua Fria rhyolitic rocks. Exploratory drilling began at Los Azufres in 1976. By 1998, 67 wells had been drilled in an area of 60 sq km, of which 33 were producing electricity.
Photo by Pat Dobson, 1982 (Lawrence Berkeley National Laboratory).