20120714 Log

Note: only for an example. 20120714 log will be generated later. For now, using 20120121 event as an example

ICME Event: 2012/01/21

History: 2018/11/23: Jie Zhang started this event

1. ICME

1.1. ICME Catalogs

     Identified in ICME catalogs: Richardson & Can List
     RC catalog:
     Disturbance start time: 2012/01/21 05:01 UT
     Ejecta      Start time: 2012/01/21 06:00 UT
     Ejecta      End   time: 2012/01/22 08:00 UT
     dv = 30 km/s, v = 320 km/s, vmax= 330 km/s
     MC index:     2
     Dst:        -10 nT
     Suggested source CME: 2012/01/18 12:24 UT
     V_transit:  650 km/s

1.2. Comments

     Overall ICME quality index: 2
     ICME signatures: Bmax: 10.9 nT
                      Bz rotation
     Others ICME signature: no
     Peculiar behavior: extremely high plasma density at the center - 50 cm^-3
                        extremely high temperature at the center 3x10^5 k :

     Disturbance time 350 km/s  -> search window 119 hrs -> 2012/01/16 06 UT

2. CME

2.1. A. Candidate A

   A.1. LASCO:    
     #CME 2012/01/16 03:12 UT, full halo (from CDAW)
          major CME, fast 1060 km/s and bright

Sharp LF and fuzzy core, indicating an axial view

   A.2 .STEREO: 
          Also seen as a major CME in COR2-A and COR2 B

Front-side halo CME, consistent witht the flare source region

  A.3. AIA & GOES

corresponding flare: C2.1 at 2012/01/16 02:48 UT flare from AR11401 at N17E46

   A.4 Comment:  

Unlikey the source: the eject is in the nother-east quadrant the ejecta does not cross the equator the ejecta does not cross the polar

          Peculiar behavior: LASCO CME shows the axis of the flux rope is along the light of sight. However, the AI

A post-eruption arcade shows an orientation of north-south, indicating a size view of the axis. The two views are no t reconciled.

2.1, B, Candidate B

    B.1. LASCO  
      #CME 2012/01/18 12:24 UT, partial halo (from CDAW)
          fairly major CME, 267 km/s

central PA down toward the south pole Two flanks bairely touch the equatorial lines

    B.2. STEREO
        front-side CME with angular widht about 60 degree, mostly southward

    B.3. AIA & GOES
         #GOES flare C2.4 at 2012/01/18 12:10 UT from AR 1401 at N17E32

not corresponding to the CME, even though the timing is okay Occur at the northern hemisphere no dimming, a compact flare # coronal dimming as the disk center ~N00E00 seen in AIA 131 and other AIA passband No flare Filament activiated, but eruption feature is weak

    B.3. Comment
        Possibly the source, given the true speed is much higher than the projected speed

However, the component mostly soutward, not cross the equatorial ine

2.1.C. Candidate C

     C.1. LASCO
       #CME 2012/01/19 14:36 UT, full halo CME (from CDAW)

a major CME, speed 1120 km/s, and bright

     C.2. STEREO
       # major CME, front-side CME

     C.3. AIA and GOES

     C.4. not likely to be the source
          Too close the time

Too fast the CME, inconsistent with the arrival time and SW speed at the arrival time

2.2. Comment

       Likely solar source is Candidate B: 

4. Summary

   SW index 2
   Source index 2
   Overall index 2.