Determining parameters of radiating focus from amplitude spectra of body waves
Abstract
The relationship between the parameters of an earthquake focus and the spectral characteristics of radiation in body waves was studied. It was found that the parameter p = W/L (W is the width and L is the length of the rupture plane) is an index of strength of the medium and the isometric character of the rupture plane and exerts a decisive influence on the dynamics of focal radiation. In addition, a study was made of the correlation between the change in rupturing velocities along the length and width of the rupture plane and the behavior of the spectral characteristics V0.5. When p = const with an increase in the ratio tg phi = c(i)/c(W) the radiation spectrum becomes more high-frequency (displacement earthquakes should be more high-frequency than earthquakes with a thrust mechanism). The possibility of determining the rupturing velocities c(i) and c(W) is demonstrated. These velocities can be used an an informative parameter of the seismic process.
- Publication:
-
USSR Report Earth Sciences JPRS UES
- Pub Date:
- May 1984
- Bibcode:
- 1984RpESc.......51S
- Keywords:
-
- Displacement;
- Earthquakes;
- Foci;
- Parameter Identification;
- Radiation Spectra;
- Seismic Waves;
- Amplitudes;
- Dynamic Characteristics;
- Frequencies;
- Propagation;
- Velocity