The large amplitude event observed over the period 22 May to 4 June, 1973

Details The large amplitude event observed over the period 22 May to 4 June, 1973 The large amplitude event observed over the period 22 May to 4 June, 1973

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..68..137m&link_type=abstract

Astrophysics and Space Science, vol. 68, no. 1, Mar. 1980, p. 137-149.

Astronomy and Astrophysics

Astrophysics

10

Cosmic Rays, Diurnal Variations, Interplanetary Magnetic Fields, Radiant Flux Density, Amplitudes, Anisotropy, Forbush Decreases, Maxima

Scientific paper

The enhanced diurnal variation of cosmic-ray intensity observed over the period 22 May to 4 June, 1973 was analyzed. The main characteristic of this large-amplitude wave train is that the enhanced diurnal variation shows a maximum around 1600 h. For this analysis, data from high-latitude neutron monitors and from the satellite HEOS-2 were used. This diurnal variation is caused by the superposition of convection and field-aligned diffusion due to an enhanced density gradient of about 8%/AU. It is shown that the diffusive vector is field-aligned on the days which are separated from magnetic sector boundaries.

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