论文信息 - Variation of P-Wave Velocity before the Bear Valley, California, Earthquake of 24 February 1972

Variation of P-Wave Velocity before the Bear Valley, California, Earthquake of 24 February 1972

Residuals for P-wave traveltimes at a seismnograph station near Bear Valley, California, for small, precisely located local earthquakes at distances of 20 to 70 kilometers show a sharp increase of nearly 0.3 second about 2 months before a magnitude 5.0 earthquake that occurred within a few kilometers of the station. This indicates that velocity changes observed elsewhere premonitory to earthquakes, possibly related to dilatancy, occur along the central section of the San Andreas fault system.

[1] C. M. Scarfe,et al. Viscosity of Basic Magmas at Varying Pressure , 1973 .

[2] Amos Nur,et al. Dilatancy, pore fluids, and premonitory variations of ts/tp travel times , 1972, Bulletin of the Seismological Society of America.

[3] M. L. Sbar,et al. Premonitory Changes in Seismic Velocities and Prediction of Earthquakes , 1973, Nature.

[4] E. F. Savarensky. On the prediction of earthquakes , 1968 .

[5] P. Nelson,et al. Choline Acetyltransferase Activity Is Increased in Combined Cultures of Spinal Cord and Muscle Cells from Mice , 1973, Science.

[6] M. Wyss,et al. Earthquake Prediction based on Station Residuals , 1973, Nature.

[7] K. L. Meagher,et al. Catalog of earthquakes along the San Andreas fault system in central California for the year 1971 , 1972 .

[8] D. L. Anderson,et al. Earthquake Prediction: Variation of Seismic Velocities before the San Francisco Earthquake , 1973, Science.

[9] C H Scholz,et al. Earthquake prediction: a physical basis. , 1973, Science.