Station Overview

Overview Location
Picture Gallery details...
Network CH
Station Code BNALP
Station Description Bannalp, NW
Latitude (WGS84) 46.87034
Longitude (WGS84) 8.4249
Station altitude (CH1903) 1549.0
running from 1998-04-14
...until now
Waveform Access open
Sensor Types Accelerometer Velocimeter
Geological Unit Limestone (Lower Cretaceous)
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 A
Ground type SIA A
Basin Information not in a sedimentary basin with possible 2D/3D effects
Reference Fäh Donat, Fritsche S., Poggi V. et al., "Determination of Site Information for Seismic Stations in Switzerland. Work Package 4: Pegasos Refinement Project", Swiss Seismological Service, ETH Zürich, 2009
Resonance Frequency (Hz) .43
Uncertainty Factor -
Vs 30 (m/s) 1601
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 14-04-1998
End Date -
Housing Class Tunnel
Housing Description Sensors in a gallery at the foot of the dam placed 15m directly below free surface, 20m from nearest entrance. BB placed in a small niche on a thin concrete foundation (niche 1m above tunnel floor). SM sensor placed on a concrete pedestal, 0.2m above concrete base on granite slab on rock.
sensor depth below station -0.2 m
Distance to Building (m) -

Current Instrumentation

Location code (none)
On date 05-07-2017 14:00:00
Off date -
Sensor model EpiSensor ES-T
Sensor manufacturer Kinemetrics
Digitizer model Q330HRS
Digitizer manufacturer Quanterra
Channels HGE , HGN , HGZ
Stream Noise (last week) HGE , HGN , HGZ
Location code (none)
On date 05-07-2017 14:00:00
Off date -
Sensor model STS2_gen3
Sensor manufacturer Streckeisen
Digitizer model Q330HRS
Digitizer manufacturer Quanterra
Channels BHE , BHN , BHZ , HHE , HHN , HHZ
Stream Noise (last week) BHE , BHN , BHZ , HHE , HHN , HHZ
Location code (none)
On date 01-10-2008 00:00:00
Off date 2017-07-05 14:00:00
Waveform Access open
Sensor model EpiSensor ES-T
Sensor manufacturer Kinemetrics
Digitizer model HRD24
Digitizer manufacturer Nanometrics
Channels HGE , HGN , HGZ
Location code (none)
On date 01-10-2008 00:00:00
Off date 2017-07-05 14:00:00
Waveform Access open
Sensor model STS2_gen3
Sensor manufacturer Streckeisen
Digitizer model HRD24
Digitizer manufacturer Nanometrics
Channels BHE , BHN , BHZ , HHE , HHN , HHZ
Location code (none)
On date 12-08-2004 00:00:00
Off date 2008-10-01 00:00:00
Waveform Access open
Sensor model EpiSensor ES-T
Sensor manufacturer Kinemetrics
Digitizer model HRD24
Digitizer manufacturer Nanometrics
Channels HGE , HGN , HGZ
Location code (none)
On date 12-08-2004 00:00:00
Off date 2008-10-01 00:00:00
Waveform Access open
Sensor model STS2_gen3
Sensor manufacturer Streckeisen
Digitizer model HRD24
Digitizer manufacturer Nanometrics
Channels HHE , HHN , HHZ
Location code (none)
On date 12-08-2004 00:00:00
Off date 2008-03-15 00:00:00
Waveform Access open
Sensor model STS2_gen3
Sensor manufacturer Streckeisen
Digitizer model HRD24
Digitizer manufacturer Nanometrics
Channels BHE , BHN , BHZ
Location code (none)
On date 30-07-1999 00:00:00
Off date 2004-08-12 00:00:00
Waveform Access open
Sensor model STS2_gen3
Sensor manufacturer Streckeisen
Digitizer model HRD24
Digitizer manufacturer Nanometrics
Channels BHE , BHN , BHZ , HHE , HHN , HHZ
Location code (none)
On date 26-09-1998 00:00:00
Off date 1999-07-30 00:00:00
Waveform Access open
Sensor model STS2_gen3
Sensor manufacturer Streckeisen
Digitizer model HRD24
Digitizer manufacturer Nanometrics
Channels BHE , BHN , BHZ , HHE , HHN , HHZ
Location code (none)
On date 14-04-1998 00:00:00
Off date 1998-09-26 00:00:00
Waveform Access open
Sensor model STS2_gen3
Sensor manufacturer Streckeisen
Digitizer model HRD24
Digitizer manufacturer Nanometrics
Channels HHE , HHN , HHZ

Site Characterization

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