Observations of December Observations of December 2006 events2006 events

Yang Liu – Stanford UniversityYang Liu – Stanford University

yliu@solar.stanford.eduyliu@solar.stanford.edu

From GOESFrom GOES

Observation from ACEObservation from ACE

LASCO observationLASCO observation

CMEs and Dst (from Gopalswamy’s CMEs and Dst (from Gopalswamy’s group)group)

v(halo)=1774 km/sv(halo)=1042 km/s

December 13 2006 flareDecember 13 2006 flare

Magnetic field on the SunMagnetic field on the Sun

AR10930

Magnetic distribution over the Sun’s Magnetic distribution over the Sun’s surfacesurface

AR10930

SOLIS

MDI

AR10930 and large-scale magnetic field.

AR10930

Evolution of AR10930 from Evolution of AR10930 from HinodeHinode

Vector field on Dec 12 Vector field on Dec 12 (20:30UT) (from Hinode)(20:30UT) (from Hinode)

Observation Potential Field

highly sheared along the neutral line.

Vector field on Dec 13 Vector field on Dec 13 (04:30UT) (from Hinode)(04:30UT) (from Hinode)

Observation Potential Field

NLFFF (only closed field lines plotted) NLFFF (only closed field lines plotted) (from McTiernan’s code available in (from McTiernan’s code available in

SSW)SSW)

Dec 12 20:30 UT Dec 13 04:30 UT

Surface flow map derived from Surface flow map derived from Longcope’s MEF codeLongcope’s MEF code

Energy of AR10930Energy of AR10930

main spot fast-spin spot

Magnetic field

Poynting from surface flow

Vertical electric currentPoynting from emerging flux