ULF geomagnetic power near L = 4. VII - A Conjugate area study of power controlled by solar wind quantities

Details ULF geomagnetic power near L = 4. VII - A Conjugate area study of power controlled by solar wind quantities ULF geomagnetic power near L = 4. VII - A Conjugate area study of power controlled by solar wind quantities

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....8710425w&link_type=abstract

(International Union of Geodesy and Geophysics, and International Association of Geomagnetism and Aeronomy, Science Assembly, 4t

Physics

Geophysics

7

Flux Density, Geomagnetism, Magnetic Disturbances, Multivariate Statistical Analysis, Power Spectra, Solar Wind, Diurnal Variations, Kinetic Energy, Magnetometers, Wave Propagation

Scientific paper

Geomagnetic energies are computed at hourly intervals for three period bands from horizontal component magnetometer data recorded at Pittsburg, New Hampshire, Girardville, Quebec, and their approximate conjugate location at Siple, Antarctica. The data were recorded during September 23-29, 1977, a relatively quiet to moderately disturbed geomagnetic interval. High correlations are found at all three stations between dayside ground magnetic energies and the solar wind kinetic energy flux density by using multivariate analysis techniques. The interplanetary quantity, whose values did not exceed 4 x 10 to the 18th erg/s for this data set, is found not to have a significant association with dayside magnetic activity. The similar results found at the conjugate stations indicate that the solar wind kinetic pressure variations are important to control dayside broadband magnetic fluctuations in the Pc 3-5 frequency range measured on the ground.

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