Jie Format: Note on tracking Sun-Earth connection event ICME Event: 2009/06/03 Observer: Taylor Cox on 2018/11/27 1. ICME 1.1. Catalog # Identified in ICME catalogs: Richardson & Cain List RC catalog Disturbance start time: 2009/06/03 16:00 UT Ejecta Start time: 2009/06/04 02:00 UT Ejecta End time: 2009/06/05 16:00 UT dv = 20 km/s, v = 310 km/s, vmax= 330 km/s MC index: 1 Dst: -21 nT Suggested source CME: N/A V_transit: 300 1.2. Comments Overall ICME quality index: # ICME signatures: Bmax: # nT Bz rotation Others ICME signature: Peculiar behavior: density and temperature data is lost within the ejecta Disturbance time 300 km/s -> search window 138 hrs -> 2009/05/29 22:00 UT 2. CME 2.1.A. Candidate A A.1. LASCO: #CME 2009/05/30 17:00 UT, partial halo CDAW CME off of the right limb seems to expand in a way to indicate a partial halo. A.2. STEREO: on STEREO A, a clear SME leaves in the direction away from earth, while in STEREO B, a fainter signiture can also be seen in the Earthward direction. This likely indicates that this event was on the Earth-facing side of the sun, but is likely not Earthbound. A.3. AIA & GOES: A.4. Comments: given the STEREO observations, this likely is not the source CME of the ICME. 2.1.B. Candidate B. #CME 2009/05/31 00:00 UT, partial halo CDAW CME off of the left limb seems to expand in a way to indicate a partial halo. B.2. STEREO: on STEREO A, a clear SME leaves in the direction towards earth, while in STEREO B, a fainter outflow can also be seen in the Earthward direction. The outflow is not a promising signature, but the direction is in agreement with STEREO A for an Earthbound CME. B.3. AIA & GOES: B.4. Comments: The stereo B observations agree in direction here and the CDAW observations show expansion that could become a partial halo. This is the most likely candidate observed. 2.2 Decided Source The most likely solar source is Candidate B. 3. Other Comments 4. Summary SW index _ Source index _ Overall index _