Station Overview

image
legend Overview at SIMPL
Overview Location
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Network CH
Station Code SIMPL
Station Description Simplonpass, VS
Latitude (WGS84) 46.23962
Longitude (WGS84) 8.01958
Station altitude (CH1903) 1930.0
running from 2009-10-28
...until now
Waveform Access open
Sensor Types Accelerometer Velocimeter
Geological Unit Gneiss and Mica-schists
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 Mountain pass
Ground type EC8
Ground type SIA
Basin Information not in a sedimentary basin with possible 2D/3D effects
Reference
Resonance Frequency (Hz) -
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 28-10-2009
End Date -
Housing Class Tunnel
Housing Description Sensor in Tunnel 10m directly below free surface, 15m from nearest entrance. Tunnel drilled in rock. It is an abandoned military bunker with several tunnels, stairs and caverns. BB and EPI sensor placed on concrete ground sitting on rock and insulated with a sheet metal cover. EPI sensor installed 0.8m north-west (-45°) of the BB sensor.
sensor depth below station 0.0 m
Distance to Building (m) -

Current Instrumentation

Location code (none)
On date 22-05-2019 14:00:00
Off date -
Sensor model EpiSensor ES-T
Sensor manufacturer Kinemetrics
Digitizer model Centaur
Digitizer manufacturer Nanometrics
Channels HGE , HGN , HGZ
Stream Noise (last week) HGE , HGN , HGZ
Location code (none)
On date 22-05-2019 14:00:00
Off date -
Sensor model Trillium 240s_g2
Sensor manufacturer Nanometrics
Digitizer model Centaur
Digitizer manufacturer Nanometrics
Channels BHE , BHN , BHZ , HHE , HHN , HHZ
Stream Noise (last week) BHE , BHN , BHZ , HHE , HHN , HHZ
Location code (none)
On date 16-07-2014 00:00:00
Off date 2019-05-22 14:00:00
Waveform Access open
Sensor model Trillium 40s
Sensor manufacturer Nanometrics
Digitizer model Taurus
Digitizer manufacturer Nanometrics
Channels BHE , BHN , BHZ , HHE , HHN , HHZ
Location code (none)
On date 28-10-2009 00:00:00
Off date 2014-07-16 00:00:00
Waveform Access open
Sensor model Trillium 40s
Sensor manufacturer Nanometrics
Digitizer model Taurus
Digitizer manufacturer Nanometrics
Channels BHE , BHN , BHZ , HHE , HHN , HHZ

Site Characterization

channel group
Empirical Amplification
CH.SIMPL..HG not available
CH.SIMPL..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.

H/V pick image:
Authoritative Site Characterization Analysis -
measurements nearby list...