Accession Number : AD0467176


Title :   NATURAL AND MAN-MADE ICE VIBRATIONS IN THE CENTRAL ARCTIC OCEAN IN THE FREQUENCY RANGE FROM 0.1 TO 100 CPS.


Descriptive Note : Technical rept.,


Corporate Author : LAMONT GEOLOGICAL OBSERVATORY PALISADES NY


Personal Author(s) : Prentiss, David


Report Date : Jun 1965


Pagination or Media Count : 1


Abstract : 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)


Descriptors :   *UNDERWATER SOUND , ARCTIC OCEAN , DETECTORS , SEISMOGRAPHS , ICE , VIBRATION , WIND , VELOCITY , ICE ISLANDS , VERY LOW FREQUENCY , RECORDING SYSTEMS , BANDPASS FILTERS , MEASUREMENT , TABLES(DATA) , SIGNAL TO NOISE RATIO


Distribution Statement : APPROVED FOR PUBLIC RELEASE