15 articles
Ambient noise cross-correlation
Ambient noise cross-correlation is a seismology technique that estimates the Green's function between two stations by cross-correlating continuous recordings of background seismic noise, treating one as a virtual source.
Ambient noise tomography
Ambient noise tomography is a seismic imaging technique that cross-correlates continuous background noise recorded at station pairs to build 3D shear-wave velocity models of the crust.
Attenuation tomography
Attenuation tomography is a geophysical imaging method that maps seismic wave attenuation in the Earth's interior, imaging the quality factor Q from recorded amplitudes and spectra of seismic waves.
Earthquake tomography
Earthquake tomography, or local earthquake tomography, is a seismological imaging method that uses earthquake wave travel times to map three-dimensional velocity structure of Earth's interior.
Full-waveform inversion
Full-waveform inversion (FWI) is a seismic imaging method that iteratively adjusts a subsurface velocity model until simulated seismic waves match recorded survey data, waveform by waveform.
P-wave tomography
P-wave tomography is a seismic imaging method that inverts compressional wave travel times from millions of earthquakes to build 3-D models of P-wave velocity variations inside the Earth, from dense arrays to the whole mantle.
Passive seismology
Passive seismology is the imaging of Earth's subsurface using natural seismic sources, earthquakes and ambient noise, instead of controlled artificial sources, at much lower cost.
Rayleigh wave tomography
Rayleigh wave tomography is a seismological imaging method that measures Rayleigh wave dispersion along earthquake–station paths and inverts it for 3-D shear-wave velocity models of the crust and upper mantle.
Receiver function
A receiver function is a time series computed from teleseismic seismograms by deconvolution, imaging crustal and upper-mantle discontinuities such as the Moho beneath a seismic station.
Seismic refraction tomography
Seismic refraction tomography (SRT) is a geophysical imaging method that inverts first-arrival seismic travel times into a grid model of subsurface P-wave velocity, used from engineering site characterization to crustal-scale experiments.
Seismic tomography
Seismic tomography is an imaging method that reconstructs three-dimensional maps of Earth's interior from seismic wave travel times recorded by seismometer networks, adapted from medical imaging in the 1970s.
Surface wave tomography
Surface wave tomography is a seismological imaging method that converts measurements of how seismic surface waves disperse into 3D shear-wave velocity models of the crust and upper mantle.
Travel-time tomography
Travel-time tomography is an imaging method that inverts seismic wave arrival times to reconstruct the Earth's internal velocity structure, adapted from medical imaging in the 1970s.
Traveltime tomography
Traveltime tomography is an inverse method that reconstructs a medium's internal velocity structure from measured wave travel times, imaging the Earth's subsurface from oil fields to the entire mantle.
Waveform tomography
Waveform tomography, known as full waveform inversion (FWI), is an iterative seismic method that estimates subsurface velocity structure by minimizing the difference between recorded and synthetic waveforms.