Physics
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.3740s&link_type=abstract
Journal of Geophysical Research, vol. 83, Aug. 1, 1978, p. 3740-3744.
Physics
4
Forbush Decreases, Hypervelocity Flow, M Region, Solar Activity, Solar Wind, Approximation, Emission Spectra, Energetic Particles, Frequency Distribution, Geomagnetic Pulsations, Line Spectra, Longitude, Magnetic Effects, Magnetic Storms, Solar Flares, Solar Wind Velocity
Scientific paper
The study provides insight into the possible relation between active regions and M regions on the sun from a correlated examination of recurrent Forbush decreases and active regions. It is shown that the long-lasting huge complexes of activity that produce flares of importance not less than 2B/3N are preferentially near the central meridian of the sun when the recurrent event starts at the earth. From the quasi-radial hypervelocity approximation (Nolte and Roelof, 1973), the leading edge of the associated corotating stream should on the average be located about 40 deg west of the central meridian of the sun. This leads to the conclusion that M regions lie to the west of huge complexes of activity. A number of earlier observations are shown to support such a conclusion.
Bemalkhedkar M. M.
Kaul C. L.
Razdan H.
Shah G. N.
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