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First of all I would like to thank my supervisor Valerie Maupin for guidance and support, and for sharing her scientific wisdom with me. This work would not have been possible without Shu-Huei Hung, to whom I am grateful for our collaboration on finite-frequency tomography. I am also indebted to Christophe Pascal for guidance on lithosphere modelling, and to Andreas Köhler and Andy Frasetto for sharing their work and data with me.I would also like to thank my co-supervisor Christian Weidle and the TopoScandiaDeep working group for discussions and inspiration. I also thank the geologists who helped me to see my geophysical models in a geological light, especially Arild Andresen, Tom Andersen,

Abstract. We present a data-processing routine to compute relative finite-frequency travel time residuals using a combination of the Iterative Cross-Correlation and Stack (ICCS) algorithm and the Multi-Channel Cross-Correlation method (MCCC). The routine has been tailored for robust measurement of P-and S-wave travel times in several frequency bands and for avoiding cycle-skipping problems at the shortest periods. We also investigate the adequacy of ray theory to calculate crustal corrections for finite-frequency regional tomography in normal continental settings with nonthinned crust. We find that ray theory is valid for both P and S waves at all relevant frequencies as long as the crust does not contain low-velocity layers associated with sediments at the surface. Reverberations in the sediments perturb the arrival times of the S waves and the long-period P waves significantly, and need to be accounted for in crustal corrections. The data-processing routine and crustal corrections are illustrated using data from a network in southwestern Scandinavia.