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Station Overview

Overview Location not available
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Network CH
Station Code NALPS
Station Description Val Nalps, GR
Latitude (WGS84) 46.59512
Longitude (WGS84) 8.74828
Station altitude (CH1903) 2346.0
running from 2011-10-31
...until now
Waveform Access open
Sensor Types Accelerometer Velocimeter
Geological Unit Orthogneiss (pre-Variscan)
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) -
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 31-10-2011
End Date -
Housing Class Free field
Housing Description Both sensor in a small box with double insulation (iron-casing, 1.2x1.2x0.8m) on a concrete socket. Concrete socket is placed directly on top of a granite cliff.
sensor depth below station -0.3 m
Distance to Building (m) -

Current Instrumentation

Location code (none)
On date 09-05-2022 10:30:00
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 09-05-2022 10:30:00
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 27-06-2019 10:00:00
Off date 2022-05-09 10:30:00
Waveform Access open
Sensor model EpiSensor ES-T
Sensor manufacturer Kinemetrics
Digitizer model Centaur
Digitizer manufacturer Nanometrics
Channels HGE , HGN , HGZ
Location code (none)
On date 27-06-2019 10:00:00
Off date 2022-05-09 10:30:00
Waveform Access open
Sensor model Trillium 240s_g2
Sensor manufacturer Nanometrics
Digitizer model Centaur
Digitizer manufacturer Nanometrics
Channels BHE , BHN , BHZ , HHE , HHN , HHZ
Location code (none)
On date 24-08-2017 10:00:00
Off date 2019-06-27 10:00:00
Waveform Access open
Sensor model EpiSensor ES-T
Sensor manufacturer Kinemetrics
Digitizer model Centaur
Digitizer manufacturer Nanometrics
Channels HGE , HGN , HGZ
Location code (none)
On date 24-08-2017 10:00:00
Off date 2019-06-27 10:00:00
Waveform Access open
Sensor model Trillium 240s_g2
Sensor manufacturer Nanometrics
Digitizer model Centaur
Digitizer manufacturer Nanometrics
Channels BHE , BHN , BHZ , HHE , HHN , HHZ
Location code (none)
On date 31-10-2011 00:00:00
Off date 2017-08-24 10:00:00
Waveform Access open
Sensor model Trillium Compact 120s
Sensor manufacturer Nanometrics
Digitizer model Taurus
Digitizer manufacturer Nanometrics
Channels HHE , HHN , HHZ

Site Characterization

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