Mathematics – Probability
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990p%26ss...38..365r&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 38, March 1990, p. 365-372.
Mathematics
Probability
5
Magnetic Storms, Particle Precipitation, Sudden Storm Commencements, D Region, Interplanetary Magnetic Fields, Ionosondes
Scientific paper
Particle precipitation events coinciding with storm sudden commencements were studied for 328 events occurring during 1970-1979. The study was based on data recorded at seven riometer stations between L = 3.3 and 6.0, on ionosonde data and on IMF Bz data. At L greater than 5, the probability of occurrence of a precipitation event is greater at night than during the day. South of this the probability is almost equal during the day and night. Generally, precipitation increases when IMF Bz is negative. The effect of the precipitation was limited to the D-region of the ionosphere, and no effects on f0E or f0F2 were detected.
Ranta Aarne
Ranta Hilkka
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