Seismology

Seismology

The study of earthquake, seismic sources, and wave propagation through the Earth.

Contributors in Seismology

Seismology

The relative speed with which the two sides of a fault move past each other. Typically, slip rates are measured in millimetres per year. This figure applies to the motion of a fault over an extended ...

Ground shaking

Earth science; Seismology

General term referring to the qualitative or quantitative aspects of movement of the Earth's surface from earthquakes or explosions. Ground motion is produced by waves that are generated by sudden ...

Gravity

Earth science; Seismology

The attraction between two masses, such as the Earth and an object on its surface. Commonly referred to as the acceleration of gravity. Changes in the gravity field can be used to infer information ...

Variance

Earth science; Seismology

The arithmetic mean of the squared deviations from the mean.

Shadow zone

Earth science; Seismology

The area on the Earth's surface protected from seismic wave arrivals.

Earthquake

Earth science; Seismology

The sudden release of stored elastic energy caused by the sudden fracture and movement of rocks along a fault. Some of the energy released is in the form of seismic waves, that cause the ground to ...

Phase velocity

Earth science; Seismology

The velocity of each harmonic component of the surface wave period that depends on the medium parameters such as layer thickness and P and/or S wave velocities. To get good estimates of phase ...