Determination of interplanetary coronal mass ejection geometry and orientation from ground-based observations of galactic cosmic rays

Details Determination of interplanetary coronal mass ejection geometry and orientation from ground-based observations of galactic cosmic rays Determination of interplanetary coronal mass ejection geometry and orientation from ground-based observations of galactic cosmic rays

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jgra..11405109k&link_type=abstract

Journal of Geophysical Research, Volume 114, Issue A5, CiteID A05109

Physics

5

Interplanetary Physics: Cosmic Rays, Interplanetary Physics: Coronal Mass Ejections (7513), Interplanetary Physics: Ejecta, Driver Gases, And Magnetic Clouds, Interplanetary Physics: Interplanetary Magnetic Fields

Scientific paper

We have developed a method for determining interplanetary coronal mass ejection (ICME) geometry from galactic cosmic ray data recorded by the ground-based muon detector network. The cosmic ray density depression inside the ICME, which is associated with a Forbush decrease, is represented by an expanding cylinder that is based on a theoretical model of the cosmic ray particle diffusion. 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. From March 2001 to May 2005, 11 ICME events that produced Forbush decreases >2% were observed, and clear variations of the density gradient due to ICME passage were observed in 8 of 11 events. In five of the eight events, signatures of magnetic flux rope structure (large, smooth rotation of magnetic field) were also seen, and the ICME geometry and orientation deduced from the two methods were very similar in three events. This suggests that the cosmic ray-based method can be used as a complementary method for deducing ICME geometry especially for events where a large Forbush decrease is observed.

Affiliated with

Also associated with

No associations

Rating

Determination of interplanetary coronal mass ejection geometry and orientation from ground-based observations of galactic cosmic rays does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Determination of interplanetary coronal mass ejection geometry and orientation from ground-based observations of galactic cosmic rays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determination of interplanetary coronal mass ejection geometry and orientation from ground-based observations of galactic cosmic rays will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-813655