the Andaman and Nicobar arc. Deep sedimentary basins of Tertiary age such as the Cambay basin. Radioactive province – Surajkund, Hazaribagh and Jharkhand. Cratonic province – Peninsular India India has about 340 hot springs spread over the country. Of these, 62 are distributed along the northwest Himalaya, in the states of Jammu and Kashmir, Himachal Pradesh and Uttarakhand. They are found concentrated in a 30-50-km wide thermal band mostly along the river valleys. The Naga-Lusai and West Coast Provinces also manifest a series of thermal springs. The Andaman and Nicobar arc is the only place in India where volcanic activity continues, potentially a good site for geothermal energy. The Cambay geothermal belt is 200 km long and 50 km wide, with Tertiary sediments. Thermal springs have been reported from the belt although they are not of very high temperature or flow levels. High subsurface temperature and thermal fluid have been reported in deep drill wells in depth ranges of 1.7 to 1.9 km during drilling in this area. Steam blowout has also been reported in drill holes in a depth range of 1.5 to 3.4 km. The thermal springs in India's peninsular region are more related to the faults, which allow water to circulate to considerable depths. The circulating water acquires heat from the normal thermal gradient in the area, and can emerge at a high temperature. In a December 2011 report, India identified six promising geothermal sites for the development of geothermal energy. In decreasing order of potential, these are: Tattapani (Chhattisgarh) Puga (Jammu & Kashmir) Cambay Graben (Gujarat) Manikaran (Himachal Pradesh) Surajkund (Haryana) Chhumathang (Jammu & Kashmir) Puga and Chumathang area in Ladakh are deemed as the most promising geothermal fields in India. These areas were discovered in 1970s and initial exploratory efforts were made in the 1980s by Geological Survey of India (GSI). On 6 February 2021, the ONGC Energy Center (OEC) signed a Memorandum of Understanding (MoU) with Ladakh and the Ladakh Autonomous Hill Development Council, Leh in the presence of current Lieutenant governor Radha Krishna Mathur. Tidal power Tidal power, also called tidal energy, is a form of hydropower that converts energy obtained from tides into useful forms of power, mainly electricity. Local effects such as shelving, funneling, reflection and resonance can increase the potential of tidal energy in certain regions. India's potential to harness tidal energy is significant. Energy can be extracted from tides