On time-distance curves for Pn waves in the Friuli earthquake of 6 May 1976

Main Article Content

P. F. BIAGI

Abstract

Results obtained in the study of the arrival times of the Pn phase for
the Friuli earthquake of 6 May 1976 (H = 20h00™15s,5; φ = 46° 16'30" N;
λ = 13° 06' 00" E; M = 6.3) with respect to the epicentral distance are
reported. Particular emphasis is given to the fact that the travel-time
curves relative to the Pn waves and the corresponding equations are only
valid for selected alignment. By plotting the time-distance curves it was
possible to derive the depth of the lower surface of the upper mantle for
different zones; the results thus obtained exibit significant differences.

Article Details

How to Cite
BIAGI, P. F. (1979) “On time-distance curves for Pn waves in the Friuli earthquake of 6 May 1976”, Annals of Geophysics, 32(1), pp. 27–35. doi: 10.4401/ag-4728.
Section
OLD