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Station Overview

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legend Overview at SVAM
Overview Location
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Network CH
Station Code SVAM
Station Description Vaz-Muldain, GR
Latitude (WGS84) 46.69337
Longitude (WGS84) 9.526099
Station altitude (CH1903) 1227.0
running from 1991-11-23
...until now
Waveform Access open
Sensor Types Accelerometer
Geological Unit Flysch
Site Morphology Class T2
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 Moving rock slope
Ground type EC8 B
Ground type SIA C
Basin Information not in a sedimentary basin with possible 2D/3D effects
Reference Michel Clotaire, Burjanek J., Poggi V., Cauzzi C., Roten D., Fäh D., "Obervaz-Muldain (SVAM) Site characterization report", Swiss Seismological Service, ETH Zürich, 2013
Resonance Frequency (Hz) 3.17
Uncertainty Factor -
Vs 30 (m/s) 476
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 26-05-2011
End Date -
Housing Class Urban free field
Housing Description SED small vault
sensor depth below station 0.5 m
Distance to Building (m) 2
Location Code (none)
Opening Date 23-11-1991
End Date 2011-05-26
Housing Class Urban free field
Housing Description Inside of transformer house
sensor depth below station 0.0 m
Distance to Building (m) -

Current Instrumentation

Location code (none)
On date 26-05-2011 00:00:00
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 01-01-1999 00:00:00
Off date 2011-05-26 00:00:00
Waveform Access open
Sensor model AC-23
Sensor manufacturer GeoSIG
Digitizer model
Digitizer manufacturer
Channels HGE , HGN , HGZ
Location code (none)
On date 23-11-1991 00:00:00
Off date 1998-12-31 00:00:00
Waveform Access open
Sensor model AC-23
Sensor manufacturer GeoSIG
Digitizer model
Digitizer manufacturer
Channels HGE , HGN , HGZ

Site Characterization

channel group
 Empirical Amplification
CH.SVAM..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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