Figure F4. A. Vertical component spectrograms from day 350 in 2001 to day 27 in 2002 obtained by the shallow buried Guralp CMG 3 broadband seismometer (Stephen et al., this volume). See color version of this figure on the CD-ROM or Web. B. Horizontal component (1) Spectrograms from day 350 in 2001 to day 27 in 2002 obtained by the shallow buried Guralp CMG 3 broadband seismometer (Stephen et al., this volume). The frequency band between 0.1 and 2 Hz is very noisy, typical of the double-frequency microseism and holu spectra. The horizontal component shows much higher noise below 0.01 Hz than the vertical component.

Figure F4. A. Vertical component spectrograms from day 350 in 2001 to day 27 in 2002 obtained by the shallow buried Guralp CMG 3 broadband seismometer (Stephen et al., this volume). See color version of this figure on the CD-ROM or Web. B. Horizontal component (1) Spectrograms from day 350 in 2001 to day 27 in 2002 obtained by the shallow buried Guralp CMG 3 broadband seismometer (Stephen et al., this volume). The frequency band between 0.1 and 2 Hz is very noisy, typical of the double-frequency microseism and holu spectra. The horizontal component shows much higher noise below 0.01 Hz than the vertical component.