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Coronal Mass Ejection
Catalog: M2M_CATALOG
Start Time: 2023-04-16T00:36Z ( SOHO: LASCO/C2 )
All Detecting Spacecrafts:
SOHO: LASCO/C2
SOHO: LASCO/C3
STEREO A: SECCHI/COR2
Activity ID: 2023-04-16T00:36:00-CME-001 (version 1)
Source Location: N20W20
Note Keyword:
DFL: Likely deflection of the event within the FOV
Faint: Faint event; may affect type assignment
FF: Event fails/disappears before exiting COR2
GAP: Data gap
HAL: Halo CME
OVR: Event partially overlaps with another CME
Source Signature Keyword:
PEA: Post eruption arcade
DIM: Dimming
Morphology Keyword:
L: Loop
Note: Partial northern halo CME seen in SOHO LASCO C2 (very faintly in C3) and likely covered fully by the nighttime data gap in STEREO A COR2. The CME is very faint but with clear front event in white light imagery. A possible source is the long filament (or two parallel filaments) erupting between ARs 3277, 3273 and 3280 and stretching approximately from N30W20 to S09W55 seen in AIA 193/304, EUVI A 195 starting ~2023-04-15T22:30Z as dimming along the filament channel centered at ~N15W35 and more northern dimming centered at N20W20. There are also post-eruptive arcades centered at N25W30. The halo source is possibly the dimming centered at N20W20 although the halo longitude is almost 0 degrees, so either there was a significant deflection West, or the halo could be backsided.
Submitted on 2023-04-16T14:43Z by Anna
Chulaki
No Notification has been sent for this activity yet.
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The List of CME Analysis already entered: |
| Event Type |
Catalog |
Measurement TypeCME measurement type: Leading Edge (LE), Shock Front (SH), Right Hand Boundary (RHB), Left Hand Boundary (LHB), Black/White Boundary (BW), Prominence Core (COR), Disconnection Front (DIS), Trailing Edge (TE). |
Prime?"primary flag" which is either True or False. If there are multiple CME analysis entries for a single CME, earlier measurements are marked as false when new or more accurate measurements are made. This is a helpful flag if you would like to download only one most accurate CME analysis per CME |
Technique |
Long |
Lat |
Speed |
Type |
Half Width |
Time 21.5 |
Note |
WSA-ENLIL+Cone Result(s) |
Submitted By |
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CME Analysis
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M2M_CATALOG |
LE
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true |
SWPC_CAT |
1.0 |
15.0 |
317.0 |
S |
45.0 |
2023-04-16T11:59Z |
Very uncertain analysis of the leading edge using only SOHO C2 frames (one coronagraph method in swpc_cat) based on the shape of the northern halo which is almost symmetrical and with the default half width of 45 degrees since the CME is only seen as halo and in one coronagraph. The source being significantly more western (at least 20 degrees to the west of the central meridian), adding to the uncertainty of this analysis. |
1: Result 1 (2.0 AU)
Earth = 2023-04-20T10:56Z
STEREO A = 2023-04-20T09:09Z
OSIRIS-REx = 2023-04-21T18:00Z
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Anna Chulaki on 2023-04-19T11:32Z |
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CME Analysis
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M2M_CATALOG |
LE
|
false |
SWPC_CAT |
10.0 |
12.0 |
338.0 |
S |
50.0 |
2023-04-16T11:32Z |
Leading edge measurement using only SOHO C2 frames which considers a latitude/longitude closer to the source and a wider half-width to account for the northeast and western portions of the front simultaneously. |
1: Result 1 (2.0 AU)
Earth = 2023-04-20T04:33Z
STEREO A = 2023-04-20T04:33Z
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Anna Chulaki on 2023-04-17T17:42Z |
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