Note on tracking Sun-Earth connection event

ICME Event: 2011/10/06

Observer: Eleni Nikou on 2019/06

1. ICME
  1.1. Catalog
     # Identified in ICME catalogs: Richardson & Can List
      RC catalog:
      Disturbance start time: 2011/10/06 12:00 UT
      Ejecta      Start time: 2011/10/06 12:00 UT
      Ejecta      End   time: 2011/10/06 23:00 UT
      dv = 10 km/s, v = 370 km/s, vmax= 380 km/s
      MC index:     2
      Dst:        -22 nT
      Suggested source CME: -
      V_transit: -
      
  1.2. Comments
      Overall ICME quality index: 2
      ICME signatures: Bmax: 12.1 nT
               ICME signatures: B relatively smooth, Tp<Texp except for two peaks at 21:30 UT and 22:30 UT, low beta except for 12:00 UT - 14:00 UT, (v is almost constant)
      
      Disturbance time 370 km/s  -> search window 4-5 days -> 2011/10/01

2. CME
   2.1. A. Candidate A
    A.1. LASCO:    
      #CME 2011/10/02 around 02:24 UT, partial/ halo CME
           

    A.2. STEREO: 
           Also seen as a CME in COR2-A and COR2 B (first frame at COR2-A 01:54 UT)
	   Front-side CME

    A.3. AIA & GOES
	   corresponding flare:  2-Oct-2011 00:37 UT 
           class: M3.9 from AR11305 at N09W12   

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


  3. Other Comments

     The same active region AR11305 gave a plethora of CMEs the previous days.
 
     Not extended dimming areas.

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