Note on tracking Sun-Earth connection event

ICME Event: 2009/01/18

Observer: Taylor Cox on 2018/11/27

1. ICME
  1.1. Catalog
     # Identified in ICME catalogs: Richardson & Cain List
      RC catalog
      Disturbance start time: 2009/01/18 21:00 UT
      Ejecta      Start time: 2009/01/19 02:00 UT
      Ejecta      End   time: 2009/01/19 05:00 UT
      dv = 40 km/s, v = 430 km/s, vmax= 450 km/s
      MC index:     1
      Dst:        -6 nT
      Suggested source CME: N/A
      V_transit:  N/A

  1.2. Comments
      Overall ICME quality index: 2
      ICME signatures: Bmax:  12.7 nT
                       Bz rotation
      Others ICME signature: 
      Peculiar behavior: density and temperature data is lost within the ejecta

      Disturbance time 400 km/s  -> search window 104 hrs -> 2009/01/15 13:00 UT

2. CME
   2.1.A.  Candidate A
     A.1. LASCO:
      CME 2009/01/14 06:30 UT, partial halo
	   Extends off the left of the solar disk
	   

     A.2. STEREO:
      CME 2009/01/14 06:37 UT, STEREO A, Earth-directed
	   This observation confirms the LASCO-observed CME as a candidate

      CME 2009/01/14 12:37, STEREO B
	   This is a faint observation of a partial halo, mostly visible off the right of the solar disk.
           It appears significantly later than prior measurements, but still may support the candidacy of event A.

     A.3. AIA & GOES:
	    flare magnitudes from goes and AR region data/descriptors from AIA/EIT

     A.4. Comments:
             Most likely candidate. Mostly angled away from Earth, this CME has a possibility to expand enough to be Earth-affecting.

   2.1.B. Candidate B.
     B.1. LASCO:
      CME 2009/01/16 02:30 UT, outflow
	   Extends off the right of the solar disk for the duration of the day following a minor CME
	   

     B.2. STEREO:
	    STEREO A
		For the duration of the day, a significant flow can be seen headed away from the Earth on STEREO A, though a weaker flow        		Earthward is present.

	    STEREO B
		For the duration of the day, very faint outflows can be observed both towards and away from Earth. The Earthward side seems   		        possibly more intense.

     B.3. AIA & GOES:
	    flare magnitudes from goes and AR region data/descriptors from AIA/EIT

     B.4. Comments:
             This outflow occurs very close to the ICME time, and is faint enough to also be a very unlikely source. The observations in STEREO
	     make it difficult to completely eliminate though, so it is included as a candidate with an extremely unlikely quality rating.

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

3. Other Comments

N/A

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