Astronomy and Astrophysics – Astronomy
Scientific paper
May 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ia%26a...29...11d&link_type=abstract
IAA/Ingenieria Aeronautica y Astronautica, vol. 29, May 1977, p. 11-19. In Spanish.
Astronomy and Astrophysics
Astronomy
Geomagnetism, Interplanetary Magnetic Fields, Magnetopause, Earth Ionosphere, Kp Index, Solar Activity Effects, Solar Wind
Scientific paper
A vectorial treatment of the geomagnetic field and interplanetary magnetic field (IMF) is attempted with the object of shedding light on interaction between the fields. Advantages and drawbacks of the three-hour planetary index Kp are considered; the Kp is relied upon in the analysis. Data referable to nearly 35,000 hours during which the velocity of the fields were observable are considered. The kinetic effects of the solar wind perceived in terms of solar wind velocity are found independent of electromagnetic effects. The interaction between the IMF and the geomagnetic field is found maximized when the fields are antiparallel in the equatorial zone and minimized when the angle formed between them is in the 30-50 deg range, and is an increasing function of the intensity of the IMF.
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