1. Observations of December 2006 events Yang Liu – Stanford University yliu@solar.stanford.edu

2. From GOES

3. Observation from ACE

4. LASCO observation

5. CMEs and Dst (from Gopalswamy’s group) v(halo)=1774 km/s v(halo)=1042 km/s

6. December 13 2006 flare

7. Magnetic field on the Sun AR10930

8. Magnetic distribution over the Sun’s surface AR10930 SOLIS MDI

9. AR10930 and large- scale magnetic field. AR10930

10. Evolution of AR10930 from Hinode

11. Vector field on Dec 12 (20:30UT) (from Hinode) Observation Potential Field highly sheared along the neutral line.

12. Vector field on Dec 13 (04:30UT) (from Hinode) Observation Potential Field

13. NLFFF (only closed field lines plotted) (from McTiernan’s code available in SSW) Dec 12 20:30 UT Dec 13 04:30 UT

14. Surface flow map derived from Longcope’s MEF code

15. Energy of AR10930 main spot fast-spin spot Magnetic field Poynting from surface flow Vertical electric current Poynting from emerging flux