Note on tracking Sun-Earth connection event

ICME Event: 2010/02/07

Observer: Jie Zhang on 2019/07/10

1. ICME
  1.1. Catalog
     # Identified in ICME catalogs: Richardson & Can List
      RC catalog:
      Disturbance start time: 2010/02/07 17:00 UT
      Ejecta      Start time: 2010/02/07 18:00 UT
      Ejecta      End   time: 2010/02/08 22:00 UT
      dv =230 km/s, v = 370 km/s, vmax= 410 km/s
      MC index:     1
      Dst:        -22 nT
      Suggested source CME: N/A
      V_transit:  N/A
      
  1.2. Comments
      Overall ICME quality index: 2
      ICME signatures: Bmax: 10.8 nT
                       Bz_max: 6.2 nT
                 however, no low temperature, low speed  
      Others ICME signature: 
      Peculiar behavior: :

      Disturbance time 400 km/s  -> search window 104 hrs -> 2010/02/03 09 UT

2. CME
   2.1. A. Candidate A
    A.1. LASCO:    
      #CME 2010/02/01 09:50 UT, PA 244, AW 113, vel=237 km/s (from CDAW)
           not a halo CME
	   faint, slow but a large angular width
	   angular width grow at time goes
	   (only candidate in the exended search window)

    A.2 .STEREO: 
           COR2A: see a partial halo CME (2010/02/01 20:54 UT)
	   COR2B: see a nice circular CME
	   COR2A-B: propagation toward the Earth, and also indicate that the source is on the west hemisphere

    A.3. GOES: A B3 flare at about 2010/02/01 05:40 UT; not sure this CME is associated with this flare or not, since there is no appropriate EUV disk images to make the connection

    A.4. AIA: No AIA data yet
         EIT: EIT has a data gap
	   
    A.5 Comment:  
	   Unlikey the source: the CME event time seems too early 
           Peculiar behavior: N/A

     2.1. B. Candidate B
    B.1. LASCO:    
      #CME: LASCO data gap
    B.2 .STEREO: 
           COR2A: see a small CME (AW ~45deg) move toward lower-left direction starting at 2010/02/03 03:24 UT
	   COR2B: see a corresponding event move twoard lower-right at the same time
	   COR2A-B: propagation right toward the Earth, however, toward the south
           comment: very interestingly, a similar CME emerged at the same time from the opposite side of the Sun, seen in both A and B, possibly indicating a global streamer blowout surrounding the entire Sun

    B.3. GOES: A gradual B2 flare at about 2010/02/03 04:10 UT; not sure this CME is associated with this flare or not, since there is no appropriate EUV disk images to make the connection

    B.4. AIA: No AIA data yet
         EIT: has no apparent signature
	   
    B.5 Comment:  
	   Unlikey the source: the CME event time seems too early 
           Peculiar behavior: the symmetry of CMEs from both side of the Sun in both A and B may indicate a global streamer blow out.


   2.2. Comment: candiate CME is more likely to be candidate B at 2010/02/03 03:24 UT from COR2A, but it is highly spectalucar
        Transit Time:110 hr
	Transit Velocity: 
        


3. Other Comments


4. Summary
    SW index 2
    Source index 3
    Overall index 3