The CME event on 07 January 2014: Why was it a geomagnetic dud?
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.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2014
- Bibcode:
- 2014AGUFMSH51E..05R
- Keywords:
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- 2101 Coronal mass ejections;
- 7519 Flares;
- 7524 Magnetic fields;
- 7959 Models