Solar activity effects on cosmic ray intensity and geomagnetic field variation

Details Solar activity effects on cosmic ray intensity and geomagnetic field variation Solar activity effects on cosmic ray intensity and geomagnetic field variation

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ijrsp...7..179s&link_type=abstract

(Space Sciences Symposium, Andhra University, Waltair, India, Jan. 9-12, 1978.) Indian Journal of Radio and Space Physics, vol.

Physics

Space Physics

Geomagnetic Pulsations, Solar Activity Effects, Solar Cosmic Rays, Solar Terrestrial Interactions, Artificial Satellites, Forbush Decreases, Solar Flares, Type 4 Bursts

Scientific paper

An analysis has been performed to statistically correlate the date of solar flare occurrence and its importance with the short term cosmic ray intensity decreases (observed by the high latitude neutron monitors) as well as with the geomagnetic field fluctuation indices (Ap and Dst), during the period 1973-76. This period has the particular advantage of being close to a solar minimum to avoid the ambiguity due to closely spaced solar flares. It is found that the intensity decrease starts at least 2-3 days after the date of bright solar flares of Imp 1B, 2B or 3B and the amplitude of the decrease increases with the importance of the solar flare.

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