Message ID: 20251222-AL-001
Issue Time: 2025-12-22T19:48Z
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - Continued Radiation Belt Enhancement
##
## Message Issue Date: 2025-12-22T19:48:46Z
## Message ID: 20251222-AL-001
##
## 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:
Significantly elevated energetic electron fluxes in the Earth's outer radiation belt. GOES "greater than 2.0 MeV" integral electron flux remains elevated, recently crossing the threshold of 1000 pfu at 2025-12-22T14:40Z.
The elevated energetic electron flux levels observed since 2025-12-16T18:15Z are caused by the arrival of coronal hole high speed stream starting on 2025-12-12, reaching sustained speeds of approximately 715 km/s (see notifications 20251216-AL-001, 20251216-AL-002, 20251218-AL-001, and 20251220-AL-001). A subsequent coronal hole high speed stream starting on 2025-12-22 has further enhanced the electron fluxes. The solar wind speed observed at L1 is currently around 800 km/s.
NASA spacecraft at GEO, MEO and other orbits passing through or in the vicinity of the Earth's outer radiation belt can be impacted.
Activity ID: 2025-12-16T18:15:00-RBE-001.
## Notes:
URL: View Details
Message ID: 20251220-AL-001
Issue Time: 2025-12-20T18:30Z
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - Continued Radiation Belt Enhancement
##
## Message Issue Date: 2025-12-20T18:30:20Z
## Message ID: 20251220-AL-001
##
## 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:
Significantly elevated energetic electron fluxes in the Earth's outer radiation belt. GOES "greater than 2.0 MeV" integral electron flux remains elevated, recently crossing the threshold of 1000 pfu at 2025-12-20T06:55Z.
The elevated energetic electron flux levels observed since 2025-12-16T18:15Z are caused by the arrival of a coronal hole high speed stream starting on 2025-12-12, reaching sustained speeds of approximately 715 km/s (see notifications 20251216-AL-001, 20251216-AL-002, 20251218-AL-001). The solar wind speed observed at L1 is currently around 420 km/s.
NASA spacecraft at GEO, MEO and other orbits passing through or in the vicinity of the Earth's outer radiation belt can be impacted.
Activity ID: 2025-12-16T18:15:00-RBE-001.
## Notes:
URL: View Details