Following the ongoing debate about suitability of short-period sensor for seismic noise measurements at frequencies lower than 1 Hz, in this study we compare recordings from two different seismometers (Guralp CMG-3ESPC and Mark L4C-3D) installed side by side in the GeoForschungsZentrum laboratory. The comparison carried out in terms of Power Spectral Density and coherency analysis shows an excellent agreement between the short-period and the broad-band recordings in the frequency band 0.2-20 Hz. Therefore, this result highlights that with a calibrated short-period sensor one can obtain the same results that would be obtained by using a broad-band seismometer in the band of engineering interest.

On the suitability of 1 s geophone for ambient noise measurements in the 0.1-20Hz frequency range: experimental outcomes

Parolai S;
2008

Abstract

Following the ongoing debate about suitability of short-period sensor for seismic noise measurements at frequencies lower than 1 Hz, in this study we compare recordings from two different seismometers (Guralp CMG-3ESPC and Mark L4C-3D) installed side by side in the GeoForschungsZentrum laboratory. The comparison carried out in terms of Power Spectral Density and coherency analysis shows an excellent agreement between the short-period and the broad-band recordings in the frequency band 0.2-20 Hz. Therefore, this result highlights that with a calibrated short-period sensor one can obtain the same results that would be obtained by using a broad-band seismometer in the band of engineering interest.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.14083/124
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