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Title: A crustal seismic velocity model for the UK, Ireland and surrounding seas
Authors: Kelly, Annabel
England, Richard W.
Maguire, Peter K. H.
First Published: Dec-2007
Publisher: Oxford University Press for Royal Astronomical Society
Citation: Geophysical Journal International, 2007, 171 (3), pp. 1172-1184
Abstract: A regional model of the 3-D variation in seismic P-wave velocity structure in the crust of NW Europe has been compiled from wide-angle reflection/refraction profiles. Along each 2-D profile a velocity–depth function has been digitised at 5 km intervals. These 1-D velocity functions were mapped into three dimensions using ordinary kriging with weights determined to minimise the difference between digitised and interpolated values. An analysis of variograms of the digitised data suggested a radial isotropic weighting scheme was most appropriate. Horizontal dimensions of the model cells are optimised at 40 × 40 km and the vertical dimension at 1 km. The resulting model provides a higher resolution image of the 3-D variation in seismic velocity structure of the UK, Ireland and surrounding areas than existing models. The construction of the model through kriging allows the uncertainty in the velocity structure to be assessed. This uncertainty indicates the high density of data required to confidently interpolate the crustal velocity structure, and shows that for this region the velocity is poorly constrained for large areas away from the input data.
DOI Link: 10.1111/j.1365-246X.2007.03569.x
ISSN: 0956-540X
eISSN: 1365-246X
Version: Publisher Version
Status: Peer-reviewed
Type: Article
Rights: Copyright © 2007, The Authors. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Geology

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