MENU

Station Overview

Overview Location not available
Picture Gallery details...
Network CH
Station Code SFRU
Station Description Fribourg, University, FR
Latitude (WGS84) 46.79133
Longitude (WGS84) 7.157864
Station altitude (CH1903) 639.0
running from 2016-12-13
...until now
Waveform Access open
Sensor Types Accelerometer
Geological Unit Clastic sedimentary rocks (porous sandstones)
Site Morphology Class T1
T1: flat; T2: slope; T3: ridge and T4: steep ridge;
following Pessina and Fiorini (2014) A GIS procedure for fast topographic characterization of seismic recording stations, Soil Dynamics and Earthquake Engineering, 63, p248-258
Site Morphology Description Glacial geomoprhology: shaped by the ice age glaciation (moraine, terminal moraine, current glacier)
Ground type EC8 B
Ground type SIA B
Basin Information On a valley bottom basin
Reference Michel Clotaire, Bergamo P., Lontsi A., Hobiger M. & Fäh D., "SITE CHARACTERIZATION REPORT SFRU: Fribourg (FR) - Université", Swiss Seismological Service, ETH Zürich, 2017
Resonance Frequency (Hz) .82
Uncertainty Factor -
Vs 30 (m/s) 534
Location Map


Federal Office of Topograpy: National Map 1:25‘000
Topography Map


Federal Office of Topograpy: DHM25: Digital Height Model 1:25000
Geology Map

Federal Office of Topograpy: Geological map of Switzerland 1:500‘000

Sensor locations

Location Code (none)
Opening Date 13-12-2016
End Date -
Housing Class Urban free-field
Housing Description big pot, concrete vault, sensor bolted to the Foundation
sensor depth below station 1.0 m
Distance to Building (m) -

Current Instrumentation

Location code (none)
On date 27-02-2017 15:44:00
Off date -
Sensor model EpiSensor ES-T
Sensor manufacturer Kinemetrics
Digitizer model Centaur
Digitizer manufacturer Nanometrics
Channels HGE , HGN , HGZ
Stream Noise (last week) HGE , HGN , HGZ
Location code (none)
On date 13-12-2016 11:00:00
Off date 2017-02-27 15:44:00
Waveform Access open
Sensor model EpiSensor ES-T
Sensor manufacturer Kinemetrics
Digitizer model Centaur
Digitizer manufacturer Nanometrics
Channels HGE , HGN , HGZ

Site Characterization

channel group
 Empirical Amplification
CH.SFRU..HG not available

Obtained from spectral modeling of small earthquakes with constant update.

  • Top: Fourier amplification with elastic (dashed line) and anelastic (solid line) amplification functions;
  • Centre: 5% damped response spectra amplification (anelastic);
  • Bottom: Number of recordings used.

See Edwards et al. (2013), Determination of Site Amplification from Regional Seismicity: Application to the Swiss National Seismic Networks. Seismological Research Letters, 84(4), 611–621.

H/V pick image:
Authoritative Site Characterization Analysis details...
measurements nearby list...