Station Overview

Overview Location not available
Picture Gallery details...
Network CH
Station Code ZAPL
Station Description Alpnach, OW
Latitude (WGS84) 46.94788
Longitude (WGS84) 8.24262
Station altitude (CH1903) 840.0
running from 1988-10-24
...until 1991-01-14
Sensor Types Velocimeter
Geological Unit
Site Morphology Class
Site Morphology Description
Ground type EC8
Ground type SIA
Basin Information no information available
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 24-10-1988
End Date 1991-01-14
Housing Class -
Housing Description -
sensor depth below station 0.0 m
Distance to Building (m) -

Current Instrumentation

No open epochs

Location code (none)
On date 24-10-1988 00:00:00
Off date 1991-01-14 23:59:59
Sensor model Unity gain generic velocity sensor
Sensor manufacturer Generic
Digitizer model UNITY
Digitizer manufacturer generic
Channels SHZ , SLZ , SRZ

Site Characterization

channel group CH.ZAPL..SR
Empirical Amplification not available
channel group CH.ZAPL..SL
Empirical Amplification 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: not available
Authoritative Site Characterization Analysis -
measurements nearby list...