Open AccessThe upper mantle structure of the North Sea region from Rayleigh wave dispersion
Author(s) -
Stuart Graham W.
Publication year - 1978
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1978.tb04238.x
Subject(s) - geology , rayleigh wave , phase velocity , seismology , mantle (geology) , geodesy , dispersion (optics) , traverse , geophysics , surface wave , optics , physics
Summary. The phase velocity dispersion of fundamental mode Rayleigh waves (period range 13–127 s) is determined by the interstation method for three profiles that traverse the North Sea region of northwest Europe. The resulting observations have been combined to produce a regional phase velocity curve with 95 per cent confidence intervals, which belongs to the aseismic continental platform category of Knopoff. Inversions of the regional phase velocity curve by the‘Hedgehog’method indicate that the North Sea region is characterized by an upper mantle low‐velocity zone of S ‐wave velocity 4.35–4.45 km/s between depths of approximately 85–200 km.