A lithospheric seismic profile along the axis of the Alps, 1975

From 8 to 20 September 1975 refraction seismic measurements were carried out in close European cooperation on a long range profile along the strike of the Alps between France and Hungary. The execution and first results of the Alpine Longitudinal Profile 1975 are presented in this paper, which is the first of a series. 20 shots from 9 different shotpoints were recorded by 193 mobile stations along a main line of a length of 850 km as well as on a number of fans and additional shorter profiles. The recordings were subsequently digitized and a number of computer generated record sections are presented to illustrate the quality of the data. First results are given in the form of a simple crustal cross section along the main profile and of two velocity depth functions, which indicate a substantial difference in type between the westernmost part and the eastern part of the profile.