Evidence for the existence of locally-generated body waves in the short-period noise at the Large Aperture Seismic Array, Montana
1972 ◽
Vol 62
(1)
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pp. 13-29
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Keyword(s):
Abstract The approximate hexagonal configuration of LASA subarrays enables their use as omnidirectional arrays. This property is used to study the phase velocity of short-period seismic noise at different frequencies. It is found that the noise in the low-frequency band consists mainly of surface waves traveling with average velocities in the range 3.0 to 3.5 km/sec. The high-frequency noise, in the band 0.45 to 1.0 Hz, has an average velocity of about 6.0 km/sec. It is quite likely that the high-frequency noise has the nature of locally-generated body waves. Statistical analysis of Pg velocities observed during a crustal refraction experiment at LASA lends support to this hypothesis.
1981 ◽
Vol 52
(2)
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pp. 435-441
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Keyword(s):
1970 ◽
Vol 13
(4)
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pp. 826-838
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Keyword(s):
2013 ◽
Vol 307
◽
pp. 250-256
Keyword(s):
A device to generate high frequency noise from commercially available low frequency acoustic drivers
1988 ◽
Vol 123
(2)
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pp. 261-280
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2021 ◽
Vol 263
(3)
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pp. 3817-3823
2013 ◽
Vol 756-759
◽
pp. 323-326