Guralp-systems CMG-6T Manuale Utente Scaricare il pdf (Pagina 19)

Operator's Guide

Finally, many pit installations have a large space

around the seismometer, covered with a wooden

roof. Large air-filled cavities are susceptible to

currents which produce lower-frequency

vibrations, and sharp edges and corners can give

rise to turbulence. We recommend that a

wooden box is placed around the sensor to

protect it from these currents. Once in the box,

the emplacement may be backfilled with fresh

turf to insulate it from vibrations at the surface,

or simply roofed as before.

July 2011 19

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Guralp-systems CMG-6T Manuale Utente Pagina 19