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Station Overview

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legend Overview at SARK
Overview Location
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Network CH
Station Code SARK
Station Description Sarnen, Kantonsschule, OW
Latitude (WGS84) 46.8914
Longitude (WGS84) 8.24316
Station altitude (CH1903) 472.0
running from 2012-05-29
...until now
Waveform Access open
Sensor Types Accelerometer
Geological Unit Alluvium
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 Plain (in between lake Lucerne and lake Sarnen)
Ground type EC8 B
Ground type SIA E
Basin Information Lake Sarnen basin, interface at fundamental frequency at 160 m depth
Reference Michel Clotaire, Marano S., Poggi V., Burjanek J., Roten D., Cauzzi C., Fäh D., "Sarnen-Kantonsschule (SARK) Site characterization report", Swiss Seismological Service, ETH Zürich, 2013
Resonance Frequency (Hz) 1.39
Uncertainty Factor -
Vs 30 (m/s) 515
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 29-05-2012
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 11-12-2024 15:00:00
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 02-10-2014 12:38:00
Off date 2024-12-11 15:00:00
Waveform Access open
Sensor model EpiSensor ES-T
Sensor manufacturer Kinemetrics
Digitizer model Taurus
Digitizer manufacturer Nanometrics
Channels HGE , HGN , HGZ
Location code (none)
On date 29-05-2012 00:00:00
Off date 2014-10-02 12:38:00
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.SARK..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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