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Station Overview

Overview Location
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Network CH
Station Code LAUCH
Station Description Lauchernalp - Loetschental, VS
Latitude (WGS84) 46.41554
Longitude (WGS84) 7.77166
Station altitude (CH1903) 2160.0
running from 2010-10-21
...until now
Waveform Access open
Sensor Types Velocimeter
Geological Unit Amphibolite
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) .58
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 21-10-2010
End Date -
Housing Class Free field
Housing Description SED big pot on rock. 1m thick concrete foundation on rock.
sensor depth below station 0.5 m
Distance to Building (m) -

Current Instrumentation

Location code (none)
On date 21-10-2010 00:00:00
Off date -
Sensor model Trillium 40s
Sensor manufacturer Nanometrics
Digitizer model Taurus
Digitizer manufacturer Nanometrics
Channels BHE , BHN , BHZ , HHE , HHN , HHZ
Stream Noise (last week) BHE , BHN , BHZ , HHE , HHN , HHZ

Site Characterization

channel group
 Empirical Amplification
CH.LAUCH..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...