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Donki Story bundle Space Weather

SEP

26 May 2026, 11:35 GMT 2 variants

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - SEP (STEREO A) ## ## Message Issue Date: 2026-05-26T11:35:49Z ## Message ID: 20260526-AL-005 ## ## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly. ## Summary: Solar energetic particle event detected by STEREO A. The flux of 13-100 MeV protons exceeded 10^(-1) pfu/MeV starting at 2026-05-26T04:07Z. NASA spacecraft at orbits near STEREO A can be impacted. Activity ID: 2026-05-26T04:07:00-SEP-001. ## Notes: This SEP event (2026-05-26T04:07:00-SEP-001) is associated with O-type CME with ID 2026-05-25T22:12:00-CME-001 (see notification 20260526-AL-002).

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SEP
Donki Sep Space Weather

SEP

26 May 2026, 04:19 GMT

https://webtools.ccmc.gsfc.nasa.gov/DONKI/view/SEP/46379/-1

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Donki Story bundle Space Weather

SEP

26 May 2026, 00:26 GMT 2 variants

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - SEP (GOES) ## ## Message Issue Date: 2026-05-26T00:26:20Z ## Message ID: 20260526-AL-003 ## ## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly. ## Summary: Solar energetic particle event detected by GOES. The flux of > 10 MeV protons exceeds 10 pfu starting at 2026-05-26T00:15Z. NASA spacecraft at MEO, GEO and other high-altitude orbits and high-inclination LEO can be impacted. Activity ID: 2026-05-26T00:15:00-SEP-001. ## Notes: This SEP event (2026-05-26T00:15:00-SEP-001) is associated with O-Type CME with ID 2026-05-25T22:12:00-CME-001 (see notification 20260526-AL-002).

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SEP
Donki Sep Space Weather

SEP

26 May 2026, 00:23 GMT

https://webtools.ccmc.gsfc.nasa.gov/DONKI/view/SEP/46373/-1

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Donki Sep Space Weather

SEP

25 May 2026, 23:57 GMT

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - SEP (SOHO) ## ## Message Issue Date: 2026-05-25T23:57:55Z ## Message ID: 20260525-AL-003 ## ## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly. ## Summary: Solar energetic particle event detected by SOHO. The flux of one or more of the >15.8 MeV protons channels exceeds 10^(-1) pfu/MeV starting at 2026-05-25T23:34Z. NASA spacecraft at L1 and near-Earth orbits can be impacted. Activity ID: 2026-05-25T23:39:00-SEP-001. ## Notes: This SEP event (2026-05-25T23:39:00-SEP-001) is associated with O-Type CME with ID 2026-05-25T22:12:00-CME-001.

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Donki Story bundle Space Weather

SEP

25 May 2026, 23:54 GMT 2 variants

https://webtools.ccmc.gsfc.nasa.gov/DONKI/view/SEP/46371/-1

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SEP
Donki Sep Space Weather

SEP

25 May 2026, 23:35 GMT

https://webtools.ccmc.gsfc.nasa.gov/DONKI/view/SEP/46365/-1

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Donki Sep Space Weather

SEP

25 May 2026, 23:24 GMT

https://webtools.ccmc.gsfc.nasa.gov/DONKI/view/SEP/46366/-1

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