Seismology

Seismology

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

Contributors in Seismology

Seismology

A mathematical tool to describe a scalar (magnitude but no direction; zero-order tensor), a vector (magnitude and directionality; first-order tensor), and a second-order tensor which describes the ...

Step function

Earth science; Seismology

A mathematical function where its value is zero before time t0 and one afterwards. Its derivative is the delta function.

Surface reflections

Earth science; Seismology

A seismic wave that initially travels downward but then is reflected back to the surface, often repeating the cycle. Some examples of surface reflections are PP, PS and PPP.

Ridge

Earth science; Seismology

A major linear elevated landform of the ocean floor, many hundreds of kilometres in extent. It resembles a mountain range with a central rift valley.

Random vibration theory

Earth science; Seismology

A theoretical probabilistic formulation that links band-limited Gaussian noise spectra, representing the spectra of earthquake ground motions, with corresponding time history peak values.