Jie Format:
Note on tracking Sun-Earth connection event

ICME Event: 2009/07/20

Observer: Taylor Cox on 2018/11/27

1. ICME
  1.1. Catalog
     # Identified in ICME catalogs: Richardson & Cain List
      RC catalog
      Disturbance start time: 2009/07/20 14:00 UT
      Ejecta      Start time: 2009/07/21 01:00 UT
      Ejecta      End   time: 2009/07/22 04:00 UT
      dv = 20 km/s, v = 330 km/s, vmax= 350 km/s
      MC index:     1
      Dst:        -83 nT
      Suggested source CME: 2009/07/15 04:30 UT W
      V_transit:  330 km/s

  1.2. Comments
      Overall ICME quality index: #
      ICME signatures: Bmax:  6.9 nT
                       Bz rotation
      Others ICME signature: 
      Peculiar behavior: density and temperature data is lost within the ejecta

      Disturbance time 330 km/s  -> search window 126 hrs -> 2009/07/14 17:00 UT

2. CME
   2.1.A.  Candidate A
    A.1. LASCO:
      #CME 2009/07/15 17:00 UT, 
	  CDAW imaging not available this day.
	  The beginning of the following day, the remains of this event can be seen drifting off of the edge of the field of view on the left edge. This shows possibility to be a partial halo.

     A.2. STEREO:
	    STEREOS A and B both exhibit clear outflows at the time listed above. These outflows have a behavior that appears characteristic of CMEs, though the details are difficult to observe. They agree that this CDAW-undetected CME would be in the Earthward direction.

     A.3. AIA & GOES:
	    
     A.4. Comments:
            Though the LASCO images are unavailable for the most important day, observations at the start of the next day, as well as the quality and agreement of the STEREO images that happen so close to the expected time of the event indicate that this is the most likely event to be the source of the CME.

   
   2.2 Decided Source
       The most likely solar source is Candidate A.

3. Other Comments



4. Summary
    SW index _
    Source index _
    Overall index _