Note on tracking Sun-Earth connection event

ICME Event: 2011/06/04

Observer: Eleni Nikou on 2019/05

1. ICME
  1.1. Catalog
     # Identified in ICME catalogs: Richardson & Can List
      RC catalog:
      Disturbance start time: 2011/06/04 20:45 UT
      Ejecta      Start time: 2011/06/05 02:00 UT
      Ejecta      End   time: 2011/06/05 19:00 UT
      dv = 120 km/s, v = 510 km/s, vmax= 560 km/s
      MC index:     2
      Dst:        -45 nT
      Suggested source CME: 2011/06/02 12:24 UT
      V_transit:  680 km/s
      
  1.2. Comments
      Overall ICME quality index: 2
      ICME signatures: Bmax: 19.8 nT
                       Bz rotation (Bz seems relatively constant at the second half of the ICME interval), u decreases but not quite smoothly, beta has a high value at the end of the ICME interval (1.4), Tp<Texp with Tp peaks at 22:00 UT 2011/06/04, 07:00 UT and 14:00 UT 2011/06/05.
      
      Disturbance time 510 km/s  -> search window 3-4 days -> 2011/06/01

2. CME
   2.1. A. Candidate A
    A.1. LASCO:    
      #CME 2011/06/01 18:36 UT, partial halo (from CDAW)
           
    A.2 .STEREO: 
           CME in COR2-A and COR2 B, first appearence 18:54 UT
	   Front-side halo CME

    A.3. AIA & GOES
	   corresponding flare: C4.1 at 2011/06/01 17:08 UT
	                        flare from AR11226 at S19E19

    A.4 Comment:  
	   Dimmings are not extended.
           Could be the source

   2.1, B, Candidate B
     B.1. LASCO  
       #CME 2011/06/02 08:12 UT, halo (from CDAW)
           
     B.2. STEREO
         CME in COR2-A and COR2 B, first appearence 08:24 UT
	   Front-side halo CME

     B.3. AIA & GOES
          #GOES flare C3.7 at 2011/06/02 07:22 UT from AR11227 at S19E25
	  # coronal dimming around the active region but there is saturation 

     B.3. Comment
         Likely the source, because it is faster than candidate A and there is a better agreement on the timing.


   2.2. Comment

   source: Candidate B
        
   The two events (candidates A and B) occured in neighboring active regions and from the AIA data it seems that there were interconnecting loops between them.

3. Other Comments


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