Constraints from core reflections on mantle Q and density at the core boundary

Details Constraints from core reflections on mantle Q and density at the core boundary Constraints from core reflections on mantle Q and density at the core boundary

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pepi...38....1b&link_type=abstract

Physics of the Earth and Planetary Interiors (ISSN 0031-9201), vol. 38, March 30, 1985, p. 1-8. Research supported by the Spanis

Physics

2

Earth Core, Earth Mantle, Seismic Waves, Seismology, Amplitude Distribution Analysis, Density Distribution, Earthquakes, Seismographs, Wave Attenuation

Scientific paper

The amplitudes and periods of the PcP and PcS phases of two sets of seismic waves were used to derive limits for the mean values of the shear wave damping parameters Q-beta in the mantle, and on the density jump at the mantle-core boundary (MCB). The seismological data were obtained at two different stations during an earthquake in the Aleutian Islands. Amplitude ratios were derived, taking into account geometric spreading. Comparison with plausible earth models confirmed a density jump at the MCB of about 1.7. Average estimates of Q-beta under both continental and ocean regions were in the range 650 + or - 340, in agreement with previous results. The best fit to theoretical data occurred when Q-beta was assumed to increase with shear wave frequency. Correlations between observations and model values yielded compressional velocities of 0.4-1.0 feet/sec in oceanic regions, and 0.3-1.0 feet/sec in continental regions.

Affiliated with

Also associated with

No associations

Rating

Constraints from core reflections on mantle Q and density at the core boundary does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Constraints from core reflections on mantle Q and density at the core boundary, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraints from core reflections on mantle Q and density at the core boundary will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-927613