The cosmic ray ground-level enhancement of 24 October 1989

Details The cosmic ray ground-level enhancement of 24 October 1989 The cosmic ray ground-level enhancement of 24 October 1989

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasau..11...28c&link_type=abstract

Astronomical Society of Australia, Proceedings, vol. 11, no. 1, p. 28-32

Physics

Particle Acceleration, Radiation Sources, Solar Cosmic Rays, Solar Neutrons, Solar Spectra, Wave Propagation, Least Squares Method, Mathematical Models, Solar Magnetic Field, Solar Physics, Solar Terrestrial Interactions, Solar Wind

Scientific paper

The cosmic ray ground-level enhancement (GLE) of 24 October 1989 was the last of a series of GLEs associated with the same solar active region. Intensity enhancements were observed by at least 31 neutron monitors in the worldwide network, with the largest increase (approximately 200%) observed at South Pole, Antarctica around 20:30 UT. Using a least-squares model fit to all available neutron monitor data, spectra, apparent source directions and particle pitch angle distributions have been derived. The effect of disturbed geomagnetic conditions has also been taken into account.

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