SIGNAL AND NOISE IN DEEP WELLS
Keyword(s):
P Waves
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Deep‐well measurements at Grapevine, Texas; Hobart, Oklahoma; and Orlando, Florida, show that the noise is composed of surface waves that decrease in amplitude with depth. At Hobart, a low‐velocity wave guide contains wave‐guided noise. Fundamental and higher mode Rayleigh waves appear to be present in the noise at each site. The amplitudes of incident P waves depend on the depth at which the deep‐well seismometer is operated. High‐frequency P waves from quarry blasts are clearly visible in recordings from the deep‐well seismometer because the high‐frequency noise is suppressed at depth.
Keyword(s):
2008 ◽
Vol 27
(9)
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pp. 1684-1688
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Keyword(s):
1998 ◽
Vol 42
(11)
◽
pp. 2083-2092
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2014 ◽
Vol 11
(3)
◽
pp. 351-363