Geophysics: methods, seismology and P and S waves

Geophysics

Definition:

A suite of scientific techniques used to determine the physical properties of the subsurface

Deepest Earth to Shallow Soils

Gravity and Microgravity

Magnetics

Electromagnetics

Geoelectrics

Seismology

Satellite Geodesy

Detect faulting, intrustions, salt domes etc

Seismology

Surface to Inner Core

Definition:

The study of elastic waves to image Earth structure and understand seismic sources across a range of length scales

Waves

Equations

P and S Waves

Stress = Force/Area applied to a body

Strain = Change in shape of a body due to an applied stress