Station Overview

Overview Location not available
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Network CH
Station Code SBAJ
Station Description Basel, St.Johann, BS
Latitude (WGS84) 47.5669
Longitude (WGS84) 7.5829
Station altitude (CH1903) 298.0
running from 1998-02-16
...until 2009-05-05
Waveform Access open
Sensor Types Accelerometer
Geological Unit Alluvial terrace (Pleistocene)
Site Morphology Class T1
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 Edge of a terrace above Rhine plain
Ground type EC8 B
Ground type SIA C
Basin Information Rhine basin
Reference Havenith Hans-Balder, Fäh D., "INTERREG III Projekt: Erdbebenmikrozonierung am südlichen Oberrhein. Teilbreicht 2: Bestimmung der Scherwellengeschwindigkeiten", Swiss Seismological Service, ETH Zürich, 2006
Resonance Frequency (Hz) .75
Uncertainty Factor -
Vs 30 (m/s) 410
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 16-02-1998
End Date 2009-05-05
Housing Class Urban free field
Housing Description Basement of a wooden hut (concrete pedestal)
sensor depth below station 0.0 m
Distance to Building (m) -

Current Instrumentation

No open epochs

Location code (none)
On date 16-02-1998 00:00:00
Off date 2009-05-05 01:39:51
Waveform Access open
Sensor model AC-23
Sensor manufacturer GeoSIG
Digitizer model
Digitizer manufacturer
Channels HGE , HGN , HGZ

Site Characterization

channel group
Empirical Amplification
CH.SBAJ..HG 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.

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Authoritative Site Characterization Analysis details...
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