Data can be downloaded from the SED data portal at arclink.ethz.ch. Access is password protected and restricted to within the ETH domain.
Swiss Seismological Service (SED) at ETH Zurich; (1985): Temporary deployments in Switzerland associated with glacier monitoring; ETH Zurich. Other/Seismic Network. https://doi.org/10.12686/sed/networks/4d
Datacite Link: http://data.datacite.org/10.12686/sed/networks/4d