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Station Overview

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legend Overview at SEPFL
Overview Location
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Network CH
Station Code SEPFL
Station Description Lausanne, EPFL, VD
Latitude (WGS84) 46.52123
Longitude (WGS84) 6.565748
Station altitude (CH1903) 396.0
running from 2011-10-26
...until now
Waveform Access open
Sensor Types Accelerometer
Geological Unit Glacial-lacustrine terrace (Pleistocene)
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 Terrace above to the Leman lake
Ground type EC8 C
Ground type SIA D
Basin Information not in a sedimentary basin with possible 2D/3D effects
Reference Michel Clotaire, Poggi V., Roten D., Burjanek J., Cauzzi C., Fäh D., "EPFL (SEPFL) Site characterization report", Swiss Seismological Service, ETH Zürich, 2012
Resonance Frequency (Hz) 1.81
Uncertainty Factor -
Vs 30 (m/s) 217
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 26-10-2011
End Date -
Housing Class Free field
Housing Description SED large vault
sensor depth below station 1.0 m
Distance to Building (m) -

Current Instrumentation

Location code (none)
On date 16-12-2015 11:00:00
Off date -
Sensor model EpiSensor ES-T
Sensor manufacturer Kinemetrics
Digitizer model Taurus
Digitizer manufacturer Nanometrics
Channels HGE , HGN , HGZ
Stream Noise (last week) HGE , HGN , HGZ
Location code (none)
On date 26-10-2011 00:00:00
Off date 2015-12-16 11:00:00
Waveform Access open
Sensor model EpiSensor ES-T
Sensor manufacturer Kinemetrics
Digitizer model Taurus
Digitizer manufacturer Nanometrics
Channels HGE , HGN , HGZ

Site Characterization

channel group
 Empirical Amplification
CH.SEPFL..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.

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Authoritative Site Characterization Analysis details...
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