Note on tracking Sun-Earth connection event

ICME Event: 2011/09/08

Observer: Eleni Nikou on 2019/06

1. ICME
  1.1. Catalog
     # Identified in ICME catalogs: Richardson & Can List
      RC catalog:
      Disturbance start time: 2011/09/08 10:00 UT
      Ejecta      Start time: 2011/09/08 10:00 UT
      Ejecta      End   time: 2011/09/09 12:00 UT
      dv = 0 km/s, v = 320 km/s, vmax= 340 km/s
      MC index:     1
      Dst:        -7 nT
      Suggested source CME: -
      V_transit: -
      
  1.2. Comments
      Overall ICME quality index: 3
      ICME signatures: Bmax: 3.1 nT
               ICME signatures: u decreases smoothly
      
      Disturbance time 320 km/s  -> search window 5-6 days -> 2011/09/02-03

2. CME
   2.1. A. Candidate A
    A.1. LASCO:    
      #CME 2011/09/02 09:12 UT, very poor partial halo CME
           

    A.2 .STEREO: 
           Also seen as a CME in COR2-A and COR2 B (first frame at COR2-A 09:24 UT)
	   Front-side CME 
           (data gap 07:54 UT - 09:24 UT)

    A.3. AIA & GOES
	   corresponding flare: B8.9 at 2011/09/02 08:49 UT
	                        flare from AR11283 at N13E49

    A.4 Comment:  
	   Could be the source: The timing and orientation is in agreement with the observations


   
3. Other Comments

     AR11283 gave flares starting from 08/31/2011. We can not see dimmings.

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