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Station Overview

Overview Location not available
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Network 2A
Station Code GRAE1
Station Description Graechen, GRAE1, VS
Latitude (WGS84) 46.19952
Longitude (WGS84) 7.841925
Station altitude (CH1903) 1590.0
running from 2007-11-21
...until 2009-04-29
Waveform Access open
Sensor Types Velocimeter
Geological Unit Moraine
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 Rock slope
Ground type EC8
Ground type SIA
Basin Information not in a sedimentary basin with possible 2D/3D effects
Reference
Resonance Frequency (Hz) .77
Uncertainty Factor -
Vs 30 (m/s) -
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 21-11-2007
End Date 2009-04-29
Housing Class Urban free field
Housing Description Ground floor of a transformer house (concrete slab)
sensor depth below station 0.0 m
Distance to Building (m) -

Current Instrumentation

No open epochs

Location code (none)
On date 19-11-2008 00:00:00
Off date 2009-04-29 00:00:00
Waveform Access open
Sensor model LE-3D-5s
Sensor manufacturer Lennartz
Digitizer model
Digitizer manufacturer
Channels EHE , EHN , EHZ
Location code (none)
On date 21-11-2007 00:00:00
Off date 2008-05-15 00:00:00
Waveform Access open
Sensor model STS2
Sensor manufacturer Streckeisen
Digitizer model
Digitizer manufacturer
Channels EHE , EHN , EHZ , HHE , HHN , HHZ

Site Characterization

channel group
 Empirical Amplification
2A.GRAE1..EH not available
2A.GRAE1..HH 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 -
measurements nearby list...