Note on tracking Sun-Earth connection event

ICME Event: 2011/08/04

Observer: Eleni Nikou on 2019/06

1. ICME
  1.1. Catalog
     # Identified in ICME catalogs: Richardson & Can List
      RC catalog:
      Disturbance start time: 2011/08/04 21:53 UT
      Ejecta      Start time: 2011/08/05 05:00 UT
      Ejecta      End   time: 2011/08/05 14:00 UT
      dv = 70 km/s, v = 430 km/s, vmax= 440 km/s
      MC index:     1
      Dst:        -15 nT
      Suggested source CME: 2011/08/02 06:36 UT
      V_transit:  670 km/s
      
  1.2. Comments
      Overall ICME quality index: 3
      ICME signatures: Bmax: 5.9 nT
               ICME signatures: Tp<Texp, apart from two peaks
      
      Disturbance time 430 km/s  -> search window 4 days -> 2011/07/31

2. CME
   2.1. A. Candidate A
    A.1. LASCO: 2011/07/31
      #poor event on 2011/07/31 at 20:00 UT           

    A.2 .STEREO: 
           It seems that there is a poor event - surge like - that is CME in COR2-A and COR2 B (first frame at COR2-A 19:54 UT)
	   Front-side CME

    A.3. AIA & GOES
	   corresponding flare: 31-Jul-2011 19:01 UT
           C1.7 location: N18W50 at AR11265
	                        

    A.4 Comment:  
	   The source of this ICME is not clear

   
3. Other Comments

     It is not clear which is the source of this ICME, because there were very poor events at this time period and no clear halo or partial halo CME. 

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