SH51E-05:
The CME event on 07 January 2014: Why was it a geomagnetic dud?
Friday, 19 December 2014: 9:00 AM
Robin C Colaninno, Naval Research Lab DC, Washington, DC, United States, Nour-Eddine Raouafi, Applied Physics Laboratory Johns Hopkins, Laurel, MD, United States, Angelos Vourlidas, Naval Research Laboratory, Alexandria, VA, United States, Guillermo Stenborg, George Mason University Fairfax, Fairfax, VA, United States, David Lario, The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States and Viacheslav G Merkin, The Johns Hopkins University, Laurel, MD, United States
Abstract:
The X-class flare-associated CME event on 07 January 2014 originated from a large sunspot group near disk center and reached > 2000 km s-1 at its initial phases. In-situ measurements at 1 AU show a strong solar proton event. The CME was expected to cause a significant geomagnetic response. However, arriving at 1 AU the CME was significantly slower than expected (~500 km s-1) and was a complete dud in terms of geomagnetic activity. We present a comprehensive analysis of the CME using EUV and white light observations as well as in-situ measurements to understand why it was not geo-effective. We particularly study CME deflection caused by coronal holes and eventual interaction with other pre-existing and slower CMEs.
