CME Geometry Deduced from Cosmic Ray Anisotropy

Details CME Geometry Deduced from Cosmic Ray Anisotropy CME Geometry Deduced from Cosmic Ray Anisotropy

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....6.3561m&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

3

Scientific paper

The geometry of the cosmic-ray depleted region formed behind the shock associated with the CME is derived for each of two events that occurred in April 11 and August 27, 2001 by analyzing the cosmic-ray anisotropy observed by a global network of muon detectors. The preliminary analysis based on a simple model for the density distribution in space tells us that the temporal variation of the observed spatial gradient of cosmic-ray density is consistent with the depleted region confined in an inclined "cylinder" approaching and then leaving the earth with a constant velocity. The orientation of the axis, the thickness and the propagation speed of the cylinder are obtained for each event. This is the first result deriving the three dimensional geometry of the cosmic-ray depleted region from the observation of high energy cosmic rays by muon detectors.

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