Earthquake Prediction: Absence of a Precursive Change in Seismic Velocities before a Tremor of Magnitude 3frac34.
作者： A. McGarr
DOI: 10.1126/SCIENCE.185.4156.1047
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摘要: P-wave velocities in the region near source of a tremor magnitude 3(3/4) were constant to within 2 percent for 41 days before event; no evidence precursive change velocity was found. Observations S-wave and ratio also showed changes. In recent studies, premonitory changes body-wave about 10 having duration 3 weeks have been reported crustal earthquakes this size.
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sciencemag.org参考文章(7)
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