Rayleigh Wave Group Velocity Dispersion in North Atlantic Region

• Published in: Geophysical Journal International
• Main Authors: Bravo, Cristina, Udías, Agustin
• Format: Text
• Language: English
• Published: Oxford University Press 1974
• Subjects: Articles; Mid-Atlantic Ridge; Pacific; North Atlantic
• Online Access: http://gji.oxfordjournals.org/cgi/content/short/37/2/297; https://doi.org/10.1111/j.1365-246X.1974.tb01240.x

Data from five earthquakes in the Azores Islands recorded in nine stations on the European and American coasts have been used to determine Rayleigh wave group velocity dispersion curves. Analysis of these observations leads to certain conclusions about the nature of the crustal and upper mantle structure in the North Atlantic Ocean. The main results are the presence of lower velocities in the upper mantle for the Atlantic than for the Pacific and the absence of appreciable influence of the Mid-Atlantic Ridge on the dispersion of surface waves.