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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Bibliographic Details
Main Author: Prentiss, David
Other Authors: LAMONT GEOLOGICAL OBSERVATORY PALISADES NY
Format: Text
Language:English
Published: 1965
Subjects:
*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
ARLIS II (ICE ISLAND)
SOFAR
VELA UNIFORM
Arctic
Arctic Ocean
Online Access:http://www.dtic.mil/docs/citations/AD0467176
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0467176
Description
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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