Note on tracking Sun-Earth connection event

ICME Event: 2011/03/29

Observer: Eleni Nikou on 2019/05

1. ICME
  1.1. Catalog
     # Identified in ICME catalogs: Richardson & Can List
      RC catalog:
      Disturbance start time: 2011/03/29 16:02 UT
      Ejecta      Start time: 2011/03/29 23:00 UT
      Ejecta      End   time: 2011/03/31 04:00 UT
      dv = 50 km/s, v = 360 km/s, vmax= 390 km/s
      MC index:     2
      Dst:        -4 nT
      Suggested source CME: 2011/03/24 19:00 UT
      V_transit:  360 km/s
      
  1.2. Comments
      Overall ICME quality index: 2
      ICME signatures: Bmax: 14.5 nT
                       Bz rotation (relatively smooth decrease of Bz), low n, low beta, Tp<Texp (with some peaks of Tp), u (very slow decrease, seems relatively constant in the beginning)

      Disturbance time 360 km/s  -> search window 4-5 days -> 2011/03/25

2. CME
   2.1. A. Candidate A
    A.1. LASCO:    
      #CME 2011/03/24 UT, poor event (from CDAW)
           
    A.2 .STEREO: 
           CME in COR2-A and COR2 B (first appearence at COR2-A 18:54 UT)
	   Front-side halo CME

    A.3. AIA & GOES
	   GOES gives consecutive flares from AR11176. The active region is located at the southern eastern hemisphere and the location is in agreement with the direction of the CME as observed by COR2.

    A.4 Comment:  
    Likely not the source, based on the timing and velocity, this event happens too early to cause the disturbance. 
           
   2.1, B, Candidate B
     B.1. LASCO  
       #CME 2011/03/25 14:36 UT, partial halo (from CDAW)
           it moves towards the south

     B.2. STEREO
         front-side CME - it is a long duration event, first apperarence at COR2-A, 07:24 UT

     B.3. AIA & GOES
          #GOES flare 25-Mar-2011, 00:57 UT, C1.0, AR11176	   
          Dimming area is very small

     B.3. Comment


   2.2. Comment

    source: candidate B

3. Other Comments


4. Summary
    SW index 1
    Source index 2
    Overall index 2