MENU

Station Overview

Overview Location
Picture Gallery details...
Network CH
Station Code WALHA
Station Description Wallhausen, Germany
Latitude (WGS84) 47.7528
Longitude (WGS84) 9.1231
Station altitude (CH1903) 419.0
running from 2013-07-29
...until now
Waveform Access open
Sensor Types Velocimeter
Geological Unit Sandstones and marls of Miocene age (Molasse - Tertiary)
Site Morphology Class T4
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 Hillside
Ground type EC8 B
Ground type SIA B
Basin Information not in a sedimentary basin with possible 2D/3D effects
Reference Poggi Valerio, Hobiger M., Fäh D., "Walhausen, Germany (WALHA) Report on site characterization", Swiss Seismological Service, ETH Zürich, 2014
Resonance Frequency (Hz) .55
Uncertainty Factor -
Vs 30 (m/s) 734
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 29-07-2013
End Date -
Housing Class Free field
Housing Description SED big pot in soil on edge of forest.
sensor depth below station 1.0 m
Distance to Building (m) -

Current Instrumentation

Location code (none)
On date 30-09-2020 11:48:00
Off date -
Sensor model Trillium Compact 120s
Sensor manufacturer Nanometrics
Digitizer model Taurus
Digitizer manufacturer Nanometrics
Channels HHE , HHN , HHZ
Stream Noise (last week) HHE , HHN , HHZ
Location code (none)
On date 20-08-2019 09:02:00
Off date 2020-09-30 11:48:00
Waveform Access open
Sensor model Trillium Compact 120s
Sensor manufacturer Nanometrics
Digitizer model Taurus
Digitizer manufacturer Nanometrics
Channels HHE , HHN , HHZ
Location code (none)
On date 29-07-2013 00:00:00
Off date 2019-08-20 09:02:00
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.WALHA..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 details...
measurements nearby list...