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Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt
Published on: August 7, 2017
Seismic delay times: correlation with other data.
Science (New York, N.Y.)
|November 10, 1967
Summary
Seismic P-wave travel times show global variations linked to Earth
Area of Science:
- Geophysics
- Seismology
- Earth Sciences
Background:
- Understanding global variations in seismic wave travel times is crucial for interpreting Earth's internal structure.
- Previous studies have explored correlations between seismic data and various geophysical parameters.
Purpose of the Study:
- To determine global variations in seismic P-wave travel times using spherical harmonic expansion.
- To investigate correlations between seismic travel-time anomalies and Earth's geopotential, heat flow, and surface topography.
Main Methods:
- Seismic P-wave travel-time residuals were analyzed.
- Spherical harmonic expansion was employed to model global variations.
- Correlation analysis was performed between seismic coefficients and those of geopotential, heat flow, and topography.
Main Results:
- Global variations in seismic P-wave travel times were successfully mapped.
- Moderate correlations were found between seismic delay times and gravitational potential variations.
- A notable correlation was observed between heat flow and surface topography.
Conclusions:
- Seismic travel-time anomalies exhibit correlations with large-scale geophysical properties of Earth.
- Gravitational potential and surface topography are significant factors influencing seismic wave propagation.
- Further research can refine these correlations for improved geophysical modeling.
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