论文信息 - Complex P-Wave Seismograms from Simple Earthquake Sources

Complex P-Wave Seismograms from Simple Earthquake Sources

Summary Using simple models of the Earth and earthquake source we investigate theoretically the effects on the complexity of short period P seismograms of: (a) increasing the thickness of a surface layer with low P and S velocities in the source region; (b) increasing the source dimensions so that the body wave pulses radiated from the source last up to a maximum of 3 s; (c) reducing the symmetry of fracture. The results show that although source dimensions and symmetry do influence complexity the main requirement for generating a really complex seismogram with the assumed models is a thick (10km) low velocity surface layer.

J. A. Hudson | A. Douglas | J. B. Young

[1] P. D. Marshall,et al. Absorption and the Complexity of P Signals , 1971 .

[2] P. D. Marshall,et al. Earthquakes that look like Explosions , 1974 .

[3] J. C. Savage. Radiation from a realistic model of faulting , 1966 .

[4] J. Hudson,et al. A Quantitative Evaluation of Seismic Signals at Teleseismic Distances—III Computed P and Rayleigh Wave Seismograms , 1972 .

[5] H. Kanamori. Attenuation of P Waves in the Upper and Lower Mantle , 1967 .

[6] B. Julian,et al. A Study of Short Period P-wave Signals from Longshot , 1972 .

[7] H.I.S. Thirlaway. EARTHQUAKE OR EXPLOSION. , 1963 .

[8] A. Ziolkowski,et al. Observations of Short-Period Seismic Energy from Earthquakes and Inferences about the Seismic Source , 1972 .

[9] H. Thirlaway. Interpreting array records: explosion and earthquake P wavetrains which have traversed the deep mantle , 1966, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.