Ειδοποιήσεις από το σύστημα έγκαιρης προειδοποίησης DONKI της NASA (διαστημικός καιρός, Ήλιος)
NASA DONKI Notifications
NASA DONKI Notifications
Message Type: RBE
Message ID: 20260718-AL-001
Issue Time: 2026-07-18T17:50Z
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: 2026-07-18T17:50:21Z
## Message ID: 20260718-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 2026-07-18T17:10Z.
The elevated energetic electron flux levels observed since 2026-07-16T17:25Z are likely caused by the combined arrival of a coronal hole high speed stream starting on 2026-07-14, reaching a maximum speed of approximately 500 km/s, and the arrival of the CME with ID 2026-07-11T04:38:00-CME-001. The arrival of this CME was likely detected at L1 by SOLAR-1 and ACE at 2026-07-14T14:38Z. The solar wind speed observed at L1 is currently around 350 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 - CMEs (Mars, Psyche)
##
## Message Issue Date: 2026-07-17T22:29:11Z
## Message ID: 20260717-AL-002
##
## 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:
Multiple CMEs have been detected as follows:
1: C-type CME detected by STEREO A / GOES / SOHO.
Start time of the event: 2026-07-17T18:00Z.
Estimated speed: ~833 km/s.
Estimated opening half-angle: 22 deg.
Direction (lon./lat.): 127/-16 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-07-17T18:00:00-CME-001
2: S-type CME detected by STEREO A / GOES / SOHO.
Start time of the event: 2026-07-17T18:12Z.
Estimated speed: ~464 km/s.
Estimated opening half-angle: 32 deg.
Direction (lon./lat.): 119/-26 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-07-17T18:12:00-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 CMEs may impact Mars and Psyche. The leading edge of the CMEs may reach Mars at 2026-07-22T15:31Z and Psyche at 2026-07-22T10:46Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CMEs: 2026-07-17T18:00:00-CME-001 and 2026-07-17T18:12:00-CME-001):
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (Lucy, Solar Orbiter)
##
## Message Issue Date: 2026-07-17T12:25:10Z
## Message ID: 20260717-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:
C-type CME detected by STEREO A / SOHO.
Start time of the event: 2026-07-17T00:12Z.
Estimated speed: ~520 km/s.
Estimated opening half-angle: 31 deg.
Direction (lon./lat.): -126/-11 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-07-17T00:12:00-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 Lucy (glancing blow) and Solar Orbiter (glancing blow). The flank of the CME will reach Lucy at 2026-08-02T02:00Z and Solar Orbiter at 2026-07-18T21:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2026-07-17T00:12:00-CME-001):
(a) 2 AU outer boundary
https://iswa.gsfc.nasa.gov/api/redirect?filename=20260717_065200_2.0_anim.tim-den.gif
https://iswa.gsfc.nasa.gov/api/redirect?filename=20260717_065200_2.0_anim.tim-vel.gif
https://iswa.gsfc.nasa.gov/api/redirect?filename=20260717_065200_2.0_ENLIL_CONE_timeline.gif
https://iswa.gsfc.nasa.gov/api/redirect?filename=20260717_065200_2.0_ENLIL_CONE_SolO_timeline.gif
(b) 5.5 AU outer boundary
https://iswa.gsfc.nasa.gov/api/redirect?filename=20260717_065200_5.5_anim.tim-den.gif
https://iswa.gsfc.nasa.gov/api/redirect?filename=20260717_065200_5.5_anim.tim-vel.gif
https://iswa.gsfc.nasa.gov/api/redirect?filename=20260717_065200_5.5_ENLIL_CONE_Lucy_timeline.gif
## Notes:
SCORE CME typification system:
S-type: CMEs with speeds less than 500 km/s
C-type: Common 500-999 km/s
O-type: Occasional 1000-1999 km/s
R-type: Rare 2000-2999 km/s
ER-type: Extremely Rare >3000 km/s
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - Radiation Belt Enhancement
##
## Message Issue Date: 2026-07-16T17:50:48Z
## Message ID: 20260716-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 is above 1000 pfu starting at 2026-07-16T17:25Z.
The elevated energetic electron flux levels are likely caused by the combined arrival of a coronal hole high speed stream starting on 2026-07-14, reaching a maximum speed of approximately 500 km/s, and the arrival of the CME with ID 2026-07-11T04:38:00-CME-001. The arrival of this CME was likely detected at L1 by SOLAR-1 and ACE at 2026-07-14T14:38Z. The solar wind speed observed at L1 is currently around 430 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.
