The Swiss National Network (CHNet) consists of both the Swiss Digital Seismic Network (SDSNet) and the Swiss Strong Motion Network (SSMNet). The Swiss Seismological Service mainly uses broadband seismometers to register weak local, moderate regional and moderate to strong global earthquakes. In addition, SSMNet accelerometers record moderate and strong local quakes.
The accurate pinpointing of earthquake locations depends on observations gathered from multiple stations with no large azimuthal gaps, including stations close to the epicentre. However, since damaging ground motion experienced in Switzerland can also stem from events occurring beyond its borders, the Seismic Network also monitors many of the nearby operational real-time stations in neighbouring countries.