Note on tracking Sun-Earth connection event

Observer: SD

ICME

1.1.Catalog
# Identified in ICME catalogs: Richardson & Cane List
RC Catalog
Disturbance start time: 2012/07/04 19:00 UT
Ejecta start time: 2012/07/05 00:00 UT
Ejecta end time: 2012/07/06 08:00 UT
dv= 50 km/s, v = 470 km/s, vmax = 540 km/s
Bmax (nT): 8
Dst: -19
Suggested source CME: 2012/07/02 08:36
V_transit: 730 km/s

1.2.Comments
Overall ICME quality index: 2
SWl type: MC
ICME signatures: some rotational signature of magnetic field components
smoothly decreasing SW velocity
low proton temperature
*** magnetic field increases in the middle


Based on 540 km/s -> search window 76.9547 hrs or 3.20645 days -> 2012/07/01 14:02:42.938

2. CME
2.1. A. Candidate A
A.1. LASCO:
#CME 2012/07/02 20:24, partial Halo (from CDAW)
angle: 145; velocity: 527 km/s

A.2. STEREO:
Moderate CME in both COR2-A and COR2-B. Frontside moving CME

A.3. AIA & GOES:
Associated with M3.8 class flare from AR 11515 (~S17W01)
A.4. Comment:
Could be the source of disturbance, it is also possible that this CME interacted with the earlier CME (candidate B).



2.1. B. Candidate B
B.1. LASCO:
#CME 2012/07/02 11:24 UT, partial halo (from CDAW)
angle: 125; velocity: 313 km/s

B.2. STEREO:
Moderate CME in both COR2-A and COR2-B. Frontside moving CME

B.3. AIA & GOES:
Associated with M5.6 class flare from AR 11515 (~S17E08)

B.4. Comment:
Could be the source of the disturbance.


2.1. C. Candidate C
C.1. LASCO:
#CME 2012/07/01 15:36 UT (from CDAW)
angle: 135, velocity: 723 km/s


C.2. STEREO:
CME front is not distinguishable in both COR2-A and COR2-B. Front side moving CME.


C.3. AIA & GOES
Eruption from/near AR 11514 (~S18E14), not associated with any major flare
C.4. Comment:
less likely to be related to the disturbance due to the propagation direction of the CME.



2.1. D. Candidate D
D.1. LASCO:
#CME 2012/07/02 06:24 UT, partial halo (from CDAW)
angle: 134; velocity: 988 km/s

D.2. STEREO:
Observed in both COR2-A and COR2-B. CME is fainter in COR2-B. Ejecta is moving westward.

D.3. AIA & GOES:
Filament eruption from ~S19W52, not associated with any major flare.

D.4. Comment:
less likely to be related to the disturbance due to the propagation direction of the CME.


3. Other Comments

4. Summary
SW index : 2
Source index: 2
Overall index: 2
Filament: NA
WDA: Y

comment on CMEs within search window


Curators: Jie Zhang (jzhang7 AT gmu.edu); Suman Dhakal (sdhakal2 AT masonlive.gmu.edu);
Last updated: 2022/01