- The Philippines is surrounded by trenches and the land between is called the Philippine Mobile Belt. On the west, the Asian Plate subducts beneath the Philippine Sea Plate and the Manila Trench highlights the zone. On the east, the Pacific Plate subducts beneath the Philippine Sea Plate and the Philippine Trench highlights the zone. The Philippine Fault is a major left-lateral strike-slip fault that runs central along the length of the islands.
- The mobile belt is separated into two active zones, western and eastern, and it is subject to east-west compression resulting in folds and thrust zones.
- The Philippines has 24# active volcanoes distributed over the Luzon Volcanic Arc, the Eastern Philippine Volcanic Arc, the Mindanao Volcanic Province, and the Negros-Sulu Volcanic Arc.
- The country is ranked 3rd in the world in geothermal electricity generating capacity. Most geothermal systems occur in the vicinity of large Holocene calc-alkaline volcanic complexes.
- Many of the geothermal power plants are located on the southern end of the island of Luzon. Other plants are located on Leyte Island, Negros Island, and Mindanao Island.
- Geothermal areas are located over the entire length of Luzon particularly on the western side. The island of Mindanao has multiple geothermal areas. Substantial work is ongoing to expand geothermal developments.
