What is Geophysics?

Geophysicists apply principles and techniques of physics to the quantitative description of Earth, the other planets, and the interplanetary medium. A geophysicist must acquire skills in physics and mathematics as well as learn the geological processes on Earth and its environment in space. This knowledge is combined to reduce complex phenomena in the real world to mathematical or physical models that further our understanding of Earth's physical characteristics and behavior.

Studies of Earth fall into four main categories: its origin, evolution, composition, and structure. Basic to these is the origin and evolution of the Solar System, including the astronomical environment, the materials of the planets, and their behavior since formation. Models of Earth's interior use fluid dynamics, knowledge of the material properties, and high-pressure physics to explore the planet's evolution. Seismology provides direct information on Earth structure, which is used in conjunction with gravity, heat flow, electricity, and magnetism. Of great practical importance is the outer 10 km of the Earth, where natural resources can be tapped; given the expense of drilling and mining, geophysical surveys are essential before digging for resources

Subdivisions of geophysics are:

• Geodesy (gravity and the shape and movements of the Earth)

• Geomagnetism and Paleomagnetism

• Hydrology (water in and on the Earth)

• Meteorology

• Oceanography

• Planetology

• Seismology

• Solar-Planetary Relationships (the interplanetary medium)

• Tectonophysics

• Volcanology

• Applied Geophysics

More information:

Geophysics/Applied Geophysics B.S., UCLA General Catalog

Geophysics/Geophysics and Space Physics B.S., UCLA General Catalog