A network of 209 continuously running digital seismic stations equipped with short-period geophones (200 stations) and broadband sensors (9 stations) was deployed in an area of ~14 x ~14 km in the Lausitz (Saxony, Germany) for a period of ~5 weeks. The main objectives were 1) to create a 3-D model of the subsurface (shear wave velocity; ambient noise tomography) using the ambient seismic noise field and 2) to investigate the spatio-temporal distribution of the seismic noise (and noise sources). The project is related to the preparations for the construction of a ‘Low Seismic Lab’ (as part of the German Center for Astrophysics, DZA) and potentially the Einstein Telescope. Waveform data is available from the GEOFON data centre, under network code 9I.
The Eifel Large-N Seismic Network is a concentric network of about 80km aperture around the Laacher See. Instrumentation consists of broad band seismometers, short period instruments (1Hz eigenfrequency) and 4.5Hz geophones. While the broadband and short period stations cover the area rather homogeneously for about 12 month, the geophone stations were moved after 6 month from a layout focussed on the closer vicinity of the Laacher See onto a line crossing the network from south-west to north-east with a dense station spacing. The goal of the experiment is the structural investigation of the feeding system of the East Eifel and a detailed study of the tectonic and volcanic seismic activity in this area. Waveform data is available from the GEOFON data centre, under network code 6E.
A network of 400 continuously running, digital, short-period seismic stations was deployed for a time period of approximately 2 weeks in an area of ~1 x 1.7 km in the Geyer region (Saxony, Germany). The network is part of a feasibility study to check whether and to which extent passive seismic methods, i.e. ambient noise techniques with a large number of stations (LARGE-N) can be used in a mineral exploration context. The project is attached to the INFACT project ("Innovative, Non-invasive and Fully Acceptable Exploration Technologies") funded by the European Union's Horizon 2020 programme. At the same time it serves as a first field test for newly acquired LARGE-N instrumentation of the GIPP instrument pool. Waveform data are available from the GEOFON data centre, under network code XF.