The velocity of P-waves below the " 20" discontinuity "
Main Article Content
Abstract
Velocity values for P-waves below the " 2 0 ° discontinuit
y " are calculated by applying the Wadati-Masuda method, and by using
separately calculated travel-time curves for the P-waves and the PdPwaves
of each of the five earthquakes examined.
The velocities calculated have a mean value of 10.21 ± 0.24 km/sec,
and are without exception greater than those obtained in a previous piece
of research (9.57 km/sec).
As regards the value of the velocity of the P-waves above the "20°
discontinuity" (8.96 kin/sec), the percentage difference between the velocity
above and the velocity below the "20° discontinuity" is 14%.
Application of the Herglotz-Wiechert procedure in the zone of the
mantle below the "20° discontinuity" does not give significant variations
in the correlation between velocity and depth, in comparison with the results
obtained by other authors.
y " are calculated by applying the Wadati-Masuda method, and by using
separately calculated travel-time curves for the P-waves and the PdPwaves
of each of the five earthquakes examined.
The velocities calculated have a mean value of 10.21 ± 0.24 km/sec,
and are without exception greater than those obtained in a previous piece
of research (9.57 km/sec).
As regards the value of the velocity of the P-waves above the "20°
discontinuity" (8.96 kin/sec), the percentage difference between the velocity
above and the velocity below the "20° discontinuity" is 14%.
Application of the Herglotz-Wiechert procedure in the zone of the
mantle below the "20° discontinuity" does not give significant variations
in the correlation between velocity and depth, in comparison with the results
obtained by other authors.
Article Details
How to Cite
1.
FEDERICO B. The velocity of P-waves below the " 20" discontinuity ". Ann. Geophys. [Internet]. 1975Nov.25 [cited 2022Aug.18];28(1):45-63. Available from: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4890
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