BSSA, Vol. 98:2, Electronic Supplement to Strollo et al.

Electronic Supplement to
Suitability of short-period sensors for retrieving reliable H/V peaks for frequencies less than 1 Hz.

by A. Strollo, S. Parolai, K.-H. Jäckel, S. Marzorati and D. Bindi

Further combinations mentioned but not shown in the paper: REFTEK 72A and PDAS digital acquisition systems coupled with 1, 2 and 4,5 Hz sensors.

Figure E1a:	Comparison of different components of self-noise for the REFTEK 72A: Electronic Noise (E n blue), Quantization Noise (Q n light blue), Suspension Noise (S n green) and total self-noise (thick dashed red); the grey shading indicates the area delimited by the NLNM and NHNM of Peterson (1993). Left: Results obtained for a gain equal to 1 and different SPESs. Right: Results obtained for a gain equal to 32 and different SPESs.
Figure E1b:	Self-noise (red), ambient seismic noise (input) from broad-band recordings (blue) and input plus self-noise PSD (thin green) for the REFTEK 72A DAS with gain=1 (left side) and gain=32 (right side) coupled with a 2 Hz SPESs; the grey shading indicates the area delimited by the NLNM and NHNM of Peterson (1993). NS components are shown in the top panels while the UP components are in the center. The bottom panels show the corresponding average H/V spectral ratios of input from the broad-band recordings (blue) and average H/V spectral ratios of input plus self-noise (green); for both the shaded area indicates the 95 % confidence intervals (CL).
Figure E2a:	Self-noise (red), ambient seismic noise (input) from broad-band recordings (blue) and input plus self-noise PSD (thin green) for the REFTEK 72A DAS with gain=1 (left side) and gain=32 (right side) coupled with a 1 Hz SPESs; the grey shading indicates the area delimited by the NLNM and NHNM of Peterson (1993). NS components are shown in the top panels while the UP components are in the center. The bottom panels show the corresponding average H/V spectral ratios of input from the broad-band recordings (blue) and average H/V spectral ratios of input plus self-noise (green); for both the shaded area indicates the 95 % confidence intervals (CL).
Figure E2b:	Self-noise (red), ambient seismic noise (input) from broad-band recordings (blue) and input plus self-noise PSD (thin green) for the REFTEK 72A DAS with gain=1 (left side) and gain=32 (right side) coupled with a 2 Hz SPESs; the grey shading indicates the area delimited by the NLNM and NHNM of Peterson (1993). NS components are shown in the top panels while the UP components are in the center. The bottom panels show the corresponding average H/V spectral ratios of input from the broad-band recordings (blue) and average H/V spectral ratios of input plus self-noise (green); for both the shaded area indicates the 95 % confidence intervals (CL).
Figure E2c:	Self-noise (red), ambient seismic noise (input) from broad-band recordings (blue) and input plus self-noise PSD (thin green) for the REFTEK 72A DAS with gain=1 (left side) and gain=32 (right side) coupled with a 4.5 Hz SPESs; the grey shading indicates the area delimited by the NLNM and NHNM of Peterson (1993). NS components are shown in the top panels while the UP components are in the center. The bottom panels show the corresponding average H/V spectral ratios of input from the broad-band recordings (blue) and average H/V spectral ratios of input plus self-noise (green); for both the shaded area indicates the 95 % confidence intervals (CL).
Figure E3a:	Self-noise (red), ambient seismic noise (input) from broad-band recordings (blue) and input plus self-noise PSD (thin green) for PDAS DAS with the gain=1 (left side) and the gain 100 (right side) coupled with a 1 Hz SPES; the grey shading indicates the area delimited by the NLNM and NHNM of Peterson (1993). NS components are shown in the top panels while the UP components are in the centre. The bottom panels are the corresponding average H/V spectral ratios of input from broad-band recordings (blue) and average H/V spectral ratios of input plus self-noise (green); for both the shaded area indicates the 95 % confidence intervals (CL).
Figure E3b:	Self-noise (red), ambient seismic noise (input) from broad-band recordings (blue) and input plus self-noise PSD (thin green) for PDAS DAS with the gain=1 (left side) and the gain 100 (right side) coupled with a 2 Hz SPES; the grey shading indicates the area delimited by the NLNM and NHNM of Peterson (1993). NS components are shown in the top panels while the UP components are in the centre. The bottom panels are the corresponding average H/V spectral ratios of input from broad-band recordings (blue) and average H/V spectral ratios of input plus self-noise (green); for both the shaded area indicates the 95 % confidence intervals (CL).
Figure E3c:	Self-noise (red), ambient seismic noise (input) from broad-band recordings (blue) and input plus self-noise PSD (thin green) for PDAS DAS with the gain=1 (left side) and the gain 100 (right side) coupled with a 4.5 Hz SPES; the grey shading indicates the area delimited by the NLNM and NHNM of Peterson (1993). NS components are shown in the top panels while the UP components are in the centre. The bottom panels are the corresponding average H/V spectral ratios of input from broad-band recordings (blue) and average H/V spectral ratios of input plus self-noise (green); for both the shaded area indicates the 95 % confidence intervals (CL).

Thanks to Regina Milkereit.

06 December 2007, Angelo Strollo, GeoForschungsZentrum Potsdam, strollo [at] gfz-potsdam.de

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