Source parameters of some significant earthquakes near Koyna dam,India |
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| Authors: | I D Gupta V Rambabu |
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| Institution: | (1) Central Water and Power Research Station, 411 024 Pune, India |
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| Abstract: | Seismic moment, stress drop, source radius, and fault dislocation have been determined for nineteen significant earthquakes in the Konya area, India using displacement spectra of shear waves computed from strong-motion accelerograph records. Though the stress-drop shows a definite increasing trend with the seismic moment, its correlations with source radius and corner frequency indicate that a constant stress drop of 170 bars represents a good mean value to describe the source mechanism of the Koyna dam earthquakes. An empirical relationship also has been established between magnitude and seismic moment. |
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| Keywords: | Koyna dam accelerogram source parameters moment stress-drop corner frequency |
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