Accession Number:

AD0752229

Title:

Quasi-Sinusoidal Geomagnetic Variations at Geomagnetic Midlatitude

Descriptive Note:

Final rept. 1 Apr 1971-30 Jun 1972

Corporate Author:

SCIENCE RESOURCES FOUNDATION WATERTOWN MA

Personal Author(s):

• Frey, John H.
• Fischer, William L.

Report Date:

1972-07-31

Pagination or Media Count:

61.0

Abstract:

Three-component quasi-sinusoidal geomagnetic variations micropulsations at Concord, Massachusetts for a five month period have been reduced to hourly average amplitudes in six contiguous octave frequency bands covering the period range from 16 to 1024 seconds. Original high and low sensitivity data have been merged to accommodate the 70 db dynamic range of the natural variations. The local time behavior and spectral characteristics of the variations are discussed. Results of various linear correlation analyses of the varying levels of magnetospheric excitation and to the origin and propagation of hydromagnetic waves in the period range covered are discussed.

Descriptors:

• *GEOMAGNETISM
• MAGNETIC FIELDS
• POWER SPECTRA
• CORRELATION TECHNIQUES
• DIURNAL VARIATIONS

Subject Categories:

• Atmospheric Physics
• Geomagnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE