Ειδοποιήσεις από το σύστημα έγκαιρης προειδοποίησης DONKI της NASA (διαστημικός καιρός, Ήλιος)
NASA DONKI Notifications
NASA DONKI Notifications
Message Type: CME
Message ID: 20260727-AL-001
Issue Time: 2026-07-27T15:46Z
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (Europa Clipper, OSIRIS-APEX)
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## Message Issue Date: 2026-07-27T15:46:46Z
## Message ID: 20260727-AL-001
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## 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:
C-type CME detected by STEREO A / GOES.
Start time of the event: 2026-07-27T07:09Z.
Estimated speed: ~578 km/s.
Estimated opening half-angle: 20 deg.
Direction (lon./lat.): -43/23 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-07-27T07:09:00-CME-001
Based on preliminary analysis by the Moon to Mars Space Weather Analysis Office and heliospheric modeling carried out at NASA Community Coordinated Modeling Center, it is estimated that the CME may impact Europa Clipper (glancing blow) and OSIRIS-APEX (glancing blow). The flank of the CME will reach Europa Clipper at 2026-07-31T08:00Z and OSIRIS-APEX at 2026-07-31T08:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2026-07-27T07:09:00-CME-001):
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - Continued Radiation Belt Enhancement
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## Message Issue Date: 2026-07-26T14:16:24Z
## Message ID: 20260726-AL-002
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## 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 2026-07-26T13:55Z.
The elevated energetic electron flux levels observed since 2026-07-24T13:40Z (see notifications 20260724-AL-002, 20260724-AL-003) are likely caused by the arrival a coronal hole high speed stream which started on 2026-07-22, reaching maximum sustained speeds of approximately 700 km/s. The solar wind speed observed at L1 is currently around 500 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.
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (BepiColombo, Parker Solar Probe)
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## Message Issue Date: 2026-07-26T00:41:34Z
## Message ID: 20260726-AL-001
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## 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:
C-type CME detected by STEREO A.
Start time of the event: 2026-07-25T07:23Z.
Estimated speed: ~695 km/s.
Estimated opening half-angle: 15 deg.
Direction (lon./lat.): 30/30 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-07-25T07:23:00-CME-001
Based on preliminary analysis by the Moon to Mars Space Weather Analysis Office and heliospheric modeling carried out at NASA Community Coordinated Modeling Center, it is estimated that the CME may impact BepiColombo (glancing blow) and Parker Solar Probe (glancing blow). The flank of the CME may reach BepiColombo at 2026-07-26T04:00Z and Parker Solar Probe at 2026-07-27T10:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2026-07-25T07:23:00-CME-001):
