This web service can be used to download waveform data from all openly accessible stations operated in Switzerland. Data is only available in miniseed format, and is always in raw counts. To convert the data to actual ground motion response requires accessing the station information from fdsnws-station. Full deconvolution requires stationXML or datalessSEED, though correction for the channel sensitivity is sufficient within the sensor pass-band.
To download data from CHNet station BALST, HHZ component, for a M6 event in Greece (that occurred within the specified time window):
wget http://eida.ethz.ch/fdsnws/dataselect/1/query?net=CH&sta=BALST&loc=--&cha=HHZ&starttime=2013-10-12T13:11:53&endtime=2013-10-12T13:21:53&nodata=404" -O BalstHHZ.mseed
Note: This fdsnws-dataselect service only provides access to the stations operated by the Swiss Seismological Service that are available on EIDA. These are typically all unrestricted stations from the national networks and temporary projects, as well as the Swiss AlpArray stations. The SED run internally another fdsnws-dataselect service that includes all stations that are monitored by the network: including foreign stations used for improving seismic event detection and quantification, and additional stations deployed in Switzerland or elsewhere using the Swiss mobile and aftershock pools. The SED does not have the authority to provide public access to stations operated by foreign agencies, users interested in this data can access directly EIDA. Email SED_data_access@sed.ethz.ch if you have reason to access this service.