On the suitability of 1 s geophone for ambient noise measurements in the 0.1–20Hz frequency range: experimental outcomes |
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| Authors: | A Strollo D Bindi S Parolai K-H Jäckel |
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| Institution: | (1) GeoForschungsZentrum Potsdam, Telegrafenberg, 14473 Potsdam, Germany;(2) University of Potsdam, Potsdam, Germany;(3) Istituto Nazionale di Geofisica e Vulcanologia, Via Bassini 15, 20133 Milano, Italy;(4) GIPP Geophysical Instrumental Pool Potsdam, Potsdam, Germany |
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| 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 (Güralp 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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| Keywords: | Short-period sensor Broad-band sensor Noise measurements Coherency analysis |
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