Determination of ICME orientations at Earth from galactic cosmic ray observation

Details Determination of ICME orientations at Earth from galactic cosmic ray observation Determination of ICME orientations at Earth from galactic cosmic ray observation

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh24a..03k&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH24A-03

Physics

[2104] Interplanetary Physics / Cosmic Rays, [2111] Interplanetary Physics / Ejecta, Driver Gases, And Magnetic Clouds

Scientific paper

A method for determining ICME (interplanetary coronal mass ejection) geometry and orientation at Earth from galactic cosmic ray data recorded by the ground-based muon detector network is decribed. The cosmic ray density depression inside the ICME, which associated with a Forbush decrease, is represented by an expanding cylinder that is based on a theoretical model of the cosmic ray particle diffusion. The cosmic ray density gradient inside the ICME is also represented by the model, and is determined from anisotropy observation results from the gyro motion of galactic cosmic ray particles. ICME geometry and orientation are deduced from observed time variations of cosmic ray density and density gradient, and are compared with those deduced from a magnetic flux rope model.

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