Note on tracking Sun-Earth connection event

ICME Event: 2013/01/18

Observer: Suman Dhakal on 2019/05 (part 1);

1. ICME
  1.1. Catalog
	# Identified in ICME catalogs: Richardson & Can List
	RC catalog:
	Disturbance start time: 2013/01/18 12:37UT
	Ejecta      start time:	2013/01/19 00:00 UT
	Ejecta      End   time:	2013/01/19 17:00 UT
	dv =  40 km/s, v =  430 km/s, vmax=  460 km/s
      	MC index: 1    
	Dst:       -25  nT
     	Suggested source CME: 
     	V_transit:   km/s
      
  1.2. SW Plots
	Overall ICME quality index: 2 (because of low B)
	SW type: EJ+SH
	ICME signatures: Bmax: 6 nT
			 Bz smoothly changing, mostly close to zero.
	Other ICME signatures: smoothly decreasing velocity; low plasma density; low proton temperature than the expected one
				low plasma beta
                     
	Peculiar behavior: magnetic field decreased after the disturbance, avg around 5 nT.
                         
	Search Window:
	Upper bound: Disturbance speed 430 km/s: 97 hrs: 2013/01/14
	Lower bound: Transit speed < 700 km/s: 60 hrs < 2013/01/16

2. CME
   2.1. A. Candidate A
	A.1. LASCO:
		#CME 2013/01/14 09:24 UT, partial halo (from CDAW)
			slow CME with linear velocity of 264 km/s and angular width 129

	A.2. STEREO:
	  	Observed in both COR2-A and COR2-B, seems only part of the CME was moving toward the front side.

	A.3. AIA and GOES:
		Not associated with flare, eruption from the eastern limb (southern hemisphere). 
		

	A.4. Comments:
		Unlikely the source: Erupting structure was mostly behind the limb, only one foot was in front side of the Sun.



   2.1. B. Candidate B
	B.1. LASCO:
		#CME 2013/01/15 08:12, poor event (from CDAW)
			slow CME with linear velocity of 221 km/s and angular width of 105.
			Leading front was not sharp.
	B.2. STEREO:
		Seen as front side moving CME in both COR2-A and COR2-B. 

	B.3. AIA and GOES:
			Associated with M-class flare, peaked at 06:58 UT, from AR 11650

	B.4. Comments:
		located at the SE quadrant, unlikely to be the source due to small velocity and direction.



  2.1.C. Candidate C
	C.1. LASCO
		#CME 2013/01/16 19:00 UT, partial Halo (from CDAW)
			Fast CME with linear velocity 648 km/s.
			seeds C2 velocity: 573 km/s
			Sharp LE, crossed the equatorial line.
	C.2. STEREO
		Seen as major CME in COR2-A (852 km/s) and COR2-B.
		

	C.3. AIA and GOES:
		 AIA data is not available.
	
	C.4. Comments:
		Likely the source.
 

3. Other Comments
	Probable solar sorce is not identified for the disturbance.


4. Summary
  
	SW index: 2
	Source index: 3
	overall index: 3