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Station Overview

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legend Overview at SIOO
Overview Location
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Network CH
Station Code SIOO
Station Description Sion, Ophtalmol, VS
Latitude (WGS84) 46.2328
Longitude (WGS84) 7.3832
Station altitude (CH1903) 495.0
running from 2002-05-31
...until now
Waveform Access open
Sensor Types Accelerometer
Geological Unit Alluvial fan
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 Centre of the Rhone alluvial plain
Ground type EC8 B
Ground type SIA B
Basin Information Rhone basin, interface at fundamental frequency at 540 m depth
Reference Roten Daniel, Fäh D., Olsen K.B., Giardini D. , "A comparison of observed and simulated site response in the Rhone valley", Swiss Seismological Service, ETH Zürich, 2008
Resonance Frequency (Hz) .47
Uncertainty Factor -
Vs 30 (m/s) 565
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 31-05-2002
End Date -
Housing Class Building
Housing Description Basement of a masonry building (concrete slab)
sensor depth below station 0.0 m
Distance to Building (m) -

Current Instrumentation

Location code (none)
On date 19-04-2006 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 14-09-2005 00:00:00
Off date 2006-04-19 00:00:00
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 31-05-2002 00:00:00
Off date 2005-09-14 00:00:00
Waveform Access restricted
Sensor model Unity gain generic accelerometer
Sensor manufacturer Generic
Digitizer model UNITY
Digitizer manufacturer generic
Channels EGE , EGN , EGZ

Site Characterization

channel group
 Empirical Amplification
CH.SIOO..HG not available
CH.SIOO..EG 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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