Abstract
Surface wave excitation by the June 16, 1978 Snyder, Texas earthquake indicates a focal depth of 3 km and normal faulting on a northeast striking fault plane. Lg spectra indicate a corner frequency of 0.5 Hz. This corner frequency, together with a surface wave seismic moment of 6.5 E+22 dyne-cm, indicate a stress drop of about 1.5 bars, a value smaller than expected for an earthquake with mb = 4.6 – 4.7.
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