MENU

Station Overview

Overview Location not available
Picture Gallery details...
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.

H/V pick image:
Authoritative Site Characterization Analysis details...
measurements nearby list...