The November 20, 2003 magnetic cloud: Comparison of two models.

Details The November 20, 2003 magnetic cloud: Comparison of two models. The November 20, 2003 magnetic cloud: Comparison of two models.

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh31a0372m&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SH31A-0372

Physics

2111 Ejecta, Driver Gases, And Magnetic Clouds, 7513 Coronal Mass Ejections (2101), 7833 Mathematical And Numerical Techniques (0500, 3200), 7959 Models

Scientific paper

The fast (v ~ 730 km/s) magnetic cloud which reached Earth on November 20, 2003 elicited the strongest geomagetic storm of this current cycle. This presentation focuses on the structure of this ejection. Specifically, we compare two models: (i) the force-free, constant-alpha flux rope model, and (ii) the reconstruction based on the Grad-Shafranov equation. Particular attention is given to the predictions on the orientation of the magnetic field as this is a major factor determining the strength with which this ejection couples to the magnetosphere. The magnetic cloud was observed first by ACE and then by WIND, ~1.4 hours later when the spacecraft were separated by ~340 Re. This affords an excellent opportunity to study the robustness of the results obtained and, further, to draw attention to interesting transient features.

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