C - indicates that this new volcano formed on the rim or flank of an older caldera. P - indicates that smaller cones or vents occur on the flanks of calderas, stratovolcanoes or shield volcanoes. S - indicates that larger satellite volcanoes occur on the flanks of calderas, stratovolcanoes or shield volcanoes. Sometimes this value is a minimum. Geothermal Potential indicates estimated potential for presence of a developable hydrothermal system.
Codes have the following meanings.
C - Confirmed, a hydrothermal system with temperatures suitable for power generation has been confirmed by direct observation by drilling. P - Poor, no visible geothermal manifestations, no Holocene activity, no geologic evidence of a shallow magmatic system.