Rayleigh wave dispersion in the Eifel region

Abstract

We obtain Rayleigh wave dispersion curves and 1D models of the shear wave velocity v s underneath the Eifel region, Germany from teleseismic recordings. Using 31 broadband mobile stations and 10 permanent stations distributed across a nearly 400 km × 400 km wide area centred on the Eifel, an average regional model is obtained which shows a clear low v s anomaly (LVA) at 70 to 200 km depth with a maximum velocity reduction of 2.3 % at 135 km depth. To enhance the resolution below the volcanic Eifel region we calculated a local v s model based on a reduced data set with stations only from that area. This local model contains a more pronounced LVA starting at 45-50 km depth with a minimum v s at around 85 km depth (-2.5 % v s). The upper boundary of this local LVA is interpreted as the uppermost portion of the Eifel plume, and its location is in accordance with receiver function results (see Weber et al., this volume). © 2007 Springer-Verlag Berlin Heidelberg.