Gravity and magnetic methods can be directly related to physical properties of rocks, i.e. the density and the susceptibility, and are very useful to field geologists and geophysicists in the mapping and identification of various rock types. They are also used for the detection of minerals with a large contrast in density and susceptibility compared to country rock. This reference volume consists of two parts: the first part describes the basic principles nd methodology of the gravity and the magnetic methods of geophysical exploration, illustrated with global examples. It deals with geological studies and gravity and magnetic methods; geodynamic studies (plate tectonics, crustal structures, plume tectonics); resources exploration (geological mapping, hydrocarbon, mineral and groundwater exploration); environmental studies (seismotectonics, engineering sites, climate changes, mining geophysics, volcanoes and volcanic activity, landslides, impact craters) and different modes of surveying. The second part is dedicated to the Indian Continent and deals wit the application of geological data, integrated with other geophysical and geological information. It discusses geodynamics and seismotectonics with respect to the Indian Plate zone, including the Indian Ocean, Himalaya, Tibet and Archean- Proterozoic Cratons and Mobile Belts. Besides several global geodynamic studies, some major/great earthquakes like Shillong, Bhuj, New Madrid, and along the Himalayan front like Kashmir, Kangra, Sichuan, and Sumatra earthquakes and tsunami are treated extensively. It also presents ways for integrated exploration for hydrocarbons, minerals, groundwater in hard rock areas of India and Central Africa and a number of environmental issues relevant in engineering and archaeology.