Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ia%26a...27....7a&link_type=abstract
IAA/Ingenieria Aeronautica y Astronautica, vol. 27, Feb. 1975, p. 7-20. In Spanish.
Astronomy and Astrophysics
Astronomy
Magnetic Storms, Solar Wind Velocity, Sudden Storm Commencements, Time Dependence, Earth Magnetosphere, Geomagnetism, Graphs (Charts), Kp Index, Linear Equations, Periodic Variations, Solar Activity Effects, Solar Observatories, Velocity Measurement
Scientific paper
The present study analyzes and compares the various expressions obtained by different workers for solar plasma velocity. The data on 43 magnetic storms recorded at the Geophysical Observatory of Toledo during the period 1972-1973 are used to calculate the velocity of solar plasma with the aid of the Snyder-Neugebauer-Rao formula which employs three-hour planetary indices of magnetic activity. This formula is converted into an expression utilizing exclusively parameters which can be recorded at the cited observatory. Based on time periods of 15 and 24 hr after the beginning of a magnetic storm, linear- and potential-type formulas are derived which exhibit a correlation coefficient above 0.90.
Aranaz del Rio F. y.
Rebollo Martinez M. P.
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