Coronal Mass Ejection Alerts

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2024-02-28T17:48:00-CME-001

  • Catalog: M2M_CATALOG
  • Start: Wed, 28 Feb 2024 17:48:00 +0000
  • Source: N19W59
  • Region: 13590
  • Note: Bright CME visible in the NW of SOHO LASCO C2/C3. Not seen in STEREO A COR2 due to a data gap from 2024-02-28T13:23Z to 2024-02-29T03:09Z. Associated with a M1.5-class flare from AR 3590 (N19W59) starting at 2024-02-28T16:24Z. Dimming visible in SDO AIA 193, rising loops and post-eruptive arcades are visible in SDO AIA 171/193, and flare with long-lasting post-eruptive arcades visible in SDO AIA 94/131.
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2024-02-28T15:27:00-CME-001

  • Catalog: M2M_CATALOG
  • Start: Wed, 28 Feb 2024 15:27:00 +0000
  • Source: S37W10
  • Region:
  • Note: A very southern CME with a brighter narrower bulk and a fainter wider shock, covered by a data gap in STA. An unlikely source is a super small, faint dimming around (S37W10) in AIA 193 around 2024-02-28T13:00. This is very unlikely (the CME is fast and even has a pronounced shock) so then the source is most likely backsided.
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2024-02-28T09:24:00-CME-001

  • Catalog: M2M_CATALOG
  • Start: Wed, 28 Feb 2024 09:24:00 +0000
  • Source: S16E30
  • Region:
  • Note: A relatively faint CME with the clear source a C5.1 class flare centered (~S15E31) peaking at 2024-02-28T09:09Z (there is no associated active region). The CME is also associated with a faint EUV wave in AIA 193, a type II radio burst, faint dimming and tightly woven bright but small area post-eruptive arcades. The CME overlaps with one or two more CMEs.
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2024-02-28T09:12:00-CME-001

  • Catalog: M2M_CATALOG
  • Start: Wed, 28 Feb 2024 09:12:00 +0000
  • Source: N35E50
  • Region:
  • Note: Source of this bright lightbulb-shaped CME in the NE is possibly a medium-size dimming near the NE limb (~N35E50) starting around 2024-02-28T08:30Z. However, there is also an more complex faint sigmoid filament eruption in the NE quadrant seen in AIA 304 as post-eruptive arcade and in AIA 193 as arcades and a relatively faint dimming. The erupting filament seems to stretch from from AR 3594 northeastward to AR 3596 and might be centered around (N20E35) but its center is hard to determine because of the complexity and dimness of the coronal signatures.
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2024-02-27T20:24:00-CME-001

  • Catalog: M2M_CATALOG
  • Start: Tue, 27 Feb 2024 20:24:00 +0000
  • Source:
  • Region:
  • Note: Slow faint CME with the source a prominence eruption seen in AIA 171/304 behind/on the SW limb slowly rising after 2024-02-27T13Z.
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2024-02-27T11:36:00-CME-001

  • Catalog: M2M_CATALOG
  • Start: Tue, 27 Feb 2024 11:36:00 +0000
  • Source: S38E02
  • Region:
  • Note: CME seen to the S in all coronagraphs. Reanalysis of this CME from the initial entry finds the source to be front-sided, sourced at a filament centered around S38E02 (spanning approximatley S48W14 to S32E10) at 2024-02-27T08:01Z when it began to lift off best seen in SDO AIA 304. The filament fades moreso than it is observed leaving the disk, but it is the best candidate source and aligned well with coronagraph analysis between SOHO LASCO C2/C3 and STEREO COR2A.
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