Data can be downloaded from arclink.ethz.ch using the Arclink or fdsnws protocol. Access is password prortected and restricted to ETH.
Swiss Seismological Service (SED) at ETH Zurich; (2004): Temporary deployments in Sion, Switzerland to understand 3D site amplification; ETH Zurich. Other/Seismic Network. https://doi.org/10.12686/sed/networks/zp
Datacite Link: http://data.datacite.org/10.12686/sed/networks/zp