Geophysics entails the study and exploration of the Earth's interior through physical measurements collected at the earth's surface, in boreholes, from aircraft, and from satellites. Using a combination of mathematics, physics, geology, chemistry, hydrology, and computer science. A geophysicist analyzes these measurements to infer properties and processes within the Earth's complex interior.
I am not a 100% geophysicist. I am metamorphosing from an electrical engineer into a geophysicist. Topics I have worked on in the past include designing seismic data aquisition system, processing ground penetrating radar (GPR) data, running parallel algorithm for geophysical data processing, and performing 3D-inversion of geoelectric data for geothermal exploration. For several years, my central interest has been in the the geophysical imaging.
Broadly speaking, geophysical imaging addresses how to image subsurface condition based on distribution of rocks physical properties constrained by borehole information and geological setting. The image is very useful to estimate the position, distribution, geometry and total amount of the body anomaly beneath us. Furthermore, it can be used for earth resources and mineral exploration, environmental problem monitoring, and also civil engineering project.