NATURAL AND MAN-MADE ICE VIBRATIONS IN THE CENTRAL ARCTIC OCEAN IN THE FREQUENCY RANGE FROM 0.1 TO 100 CPS.
During April and May, 1962, ice vibrations in the frequency range from 0.1 to 100 cps were measured aboard drifting ice island ARLIS II in the central Arctic Ocean. A vertical-component seismometer, which was anchored to the surface of the island, was employed as a detector. Typical displacement spe...
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Format: | Text |
Language: | English |
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1965
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Online Access: | http://www.dtic.mil/docs/citations/AD0467176 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0467176 |
Summary: | During April and May, 1962, ice vibrations in the frequency range from 0.1 to 100 cps were measured aboard drifting ice island ARLIS II in the central Arctic Ocean. A vertical-component seismometer, which was anchored to the surface of the island, was employed as a detector. Typical displacement spectra show the following characteristics: (1) a nearly constant decrease in amplitude with increasing frequency from 2.4 x 10 to the 4th power m mu at 0.1 cps to 1.0 m mu at 6 cps, (2) an amplitude minimum of 0.1 m mu between 6 and 10 cps, (3) an amplitude peak of 2 m mu between 30 and 70 cps. (Author) |
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