Geometry of Interplanetary CME Deduced from Cosmic Rays

Details Geometry of Interplanetary CME Deduced from Cosmic Rays Geometry of Interplanetary CME Deduced from Cosmic Rays

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh53b0331k&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SH53B-0331

Other

2104 Cosmic Rays, 2111 Ejecta, Driver Gases, And Magnetic Clouds, 2114 Energetic Particles, Heliospheric (7514), 2118 Energetic Particles, Solar, 2164 Solar Wind Plasma

Scientific paper

A coronal mass ejection (CME) associated with an X17 solar flare reached Earth on October 29, 2003, causing an ˜ 11 % decrease in the intensity of high-energy Galactic cosmic rays recorded by muon detectors. The CME also produced a strong enhancement of the cosmic ray directional anisotropy. Based upon a simple inclined cylinder model, we use the anisotropy data to derive for the first time the three-dimensional geometry of the cosmic ray depleted region formed behind the shock in this event. We also compare the geometry derived from cosmic rays with that derived from in situ interplanetary magnetic field (IMF) observations using a Magnetic Flux Rope model. We also will analyze other events with the same model and discuss the geometry of the depleted region in each event.

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