Study of A CME-CME Interaction Event Based on Multiple Observations

Details Study of A CME-CME Interaction Event Based on Multiple Observations Study of A CME-CME Interaction Event Based on Multiple Observations

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh22a..02s&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH22A-02

Astronomy and Astrophysics

Astrophysics

[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections

Scientific paper

The CME-CME's interaction during their propagation in interplanetary space has been widely reported and such complex structure was thought to be the major source of extremely large geomagnetic storm. But, previous results of CME's interaction are almost obtained from the remote observations at near solar region only and in-situ observations at 1AU. The interaction of CMEs during their propagation in interplanetary space was only studied by MHD simulation. After 2006, the launch of STEREO twin satellites and their combination with other observatories provide us a good opportunity to study the CME's interaction during its propagation in interplanetary space. At 2008 November 4, the HI1 instrument on STEREO B recorded direct images of the interaction between two CMEs in interplanetary space from about 30 Rs. At the same time, a radio signature caused by the CME's interaction was recorded by WIND/WAVES. Then, the HI1 and HI2 instruments on STEREO B further tracked this interacted structure to 1AU and the in-situ instruments of STEREO A detected it at 2008 November 8. Based on these remote and in-situ observations, this CME-CME interaction event will be studied detailed in this work. Especially, what happened during the CME's interaction will be stressed.

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