Ειδοποιήσεις από το σύστημα έγκαιρης προειδοποίησης DONKI της NASA (διαστημικός καιρός, Ήλιος)
NASA DONKI Notifications
NASA DONKI Notifications
Message Type: RBE
Message ID: 20260417-AL-001
Issue Time: 2026-04-17T12:34Z
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: 2026-04-17T12:34:02Z
## Message ID: 20260417-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 2026-04-17T10:05Z.
The elevated energetic electron flux levels observed since 2026-04-10T13:55Z (see notifications 20260411-AL-001, 20260413-AL-001, 20260415-AL-001) are caused by the arrival of a coronal hole high speed stream which started on 2026-04-10, reaching maximum sustained speeds of approximately 620 km/s. The solar wind speed observed at L1 is currently around 310 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 (Europa Clipper, OSIRIS-APEX, STEREO A, Missions Near Earth)
##
## Message Issue Date: 2026-04-16T19:38:00Z
## Message ID: 20260416-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 / GOES / SOHO.
Start time of the event: 2026-04-16T09:00Z.
Estimated speed: ~677 km/s.
Estimated opening half-angle: 16 deg.
Direction (lon./lat.): 22/-9 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-16T09:00:00-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 this CME may affect Europa Clipper (glancing blow), OSIRIS-APEX (glancing blow), and STEREO A (glancing blow). The flank of the CME will reach Europa Clipper at 2026-04-21T06:00Z, OSIRIS-APEX at 2026-04-19T04:00Z, and STEREO A at 2026-04-19T05:00Z (plus minus 7 hours).
The simulation also indicates that the CME may have a glancing blow at NASA missions near Earth. Simulations indicate that the flank of the CME will reach NASA missions near Earth at about 2026-04-18T14:00Z (plus minus 7 hours). The roughly estimated expected range of the maximum Kp index is 3-5 (below minor to minor).
Links to the movies of the modeled event (includes CME: 2026-04-16T09:00:00-CME-001):
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (Mars, Parker Solar Probe, Psyche, BepiColombo, Solar Orbiter)
##
## Message Issue Date: 2026-04-15T18:31:43Z
## Message ID: 20260415-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:
C-type CME detected by STEREO A / GOES / SOHO.
Start time of the event: 2026-04-15T11:53Z.
Estimated speed: ~880 km/s.
Estimated opening half-angle: 32 deg.
Direction (lon./lat.): 143/12 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-15T11:53:00-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 Mars, Parker Solar Probe, Psyche, BepiColombo (glancing blow), and Solar Orbiter (glancing blow). The leading edge of the CME will reach Mars at 2026-04-19T02:24Z, Parker Solar Probe at 2026-04-17T03:54Z, and Psyche at 2026-04-19T07:02Z (plus minus 7 hours). The flank of the CME will reach BepiColombo at 2026-04-16T11:00Z, and Solar Orbiter at 2026-04-17T18:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2026-04-15T11:53:00-CME-001):
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information (CCMC DONKI)
## Message Type: Weekly Space Weather Summary Report for April 08, 2026 - April 14, 2026
##
## Message Issue Date: 2026-04-15T17:18:08Z
## Report Coverage Begin Date: 2026-04-08T00:00Z
## Report Coverage End Date: 2026-04-14T23:59Z
## Message ID: 20260415-7D-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:
Solar activity was at moderate levels during this reporting period with 1 M-class flare, 1 O-type CME, and 5 C-type CMEs (see details below).
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 was estimated that the following CMEs were predicted to impact the listed locations:
CME Starting time | Predicted Impacts (plus minus 7 hours)
-----------------------------------------------------------------------------
2026-04-10T06:09Z BepiColombo at 2026-04-11T07:18Z, Juice at 2026-04-15T11:00Z (minor impact), Parker Solar Probe at 2026-04-12T00:00Z (glancing blow), STEREO A at 2026-04-13T09:00Z (glancing blow) (see notification 20260410-AL-002).
2026-04-12T17:23Z Mars at 2026-04-16T16:00Z (minor impact), Psyche at 2026-04-16T21:00Z (minor impact) (see notification 20260412-AL-001).
2026-04-13T04:00Z BepiColombo at 2026-04-14T06:00Z (glancing blow), STEREO A at 2026-04-15T07:00Z (glancing blow) (see notification 20260413-AL-002).
2026-04-13T14:00Z BepiColombo at 2026-04-14T14:00Z (glancing blow) (see notification 20260413-AL-003).
2026-04-13T18:24Z Mars at 2026-04-17T18:02Z, Parker Solar Probe at 2026-04-16T03:26Z, Psyche at 2026-04-17T23:09Z, BepiColombo at 2026-04-15T04:00Z (glancing blow) (see notification 20260414-AL-001).
Geomagnetic activity was at below minor levels with Kp index (a measure of geomagnetic activity, ranging 0-9) <= 4.33 for the reporting period.
The > 2.0 MeV energetic electron flux detected at GOES was elevated above the threshold level of 1000 pfu at the beginning of the reporting period due to a threshold crossing from a previous reporting period starting at 2026-04-03T09:05Z (see notifications 20260403-AL-002, 20260405-AL-001, 20260407-AL-001, 20260409-AL-001). This elevation of energetic electron flux levels was likely associated with the arrival of a coronal hole high speed stream detected at L1 by ACE and DSCOVR on 2026-04-02. The fluxes briefly returned to background levels on 2026-04-10.
The >2.0 MeV energetic electron flux levels crossed the threshold of 1000 pfu again at 2026-04-10T13:55Z (see notifications 20260411-AL-001, 20260413-AL-001, 20260415-AL-001). This subsequent elevation of energetic electron flux levels was likely associated with the arrival of a coronal hole high speed stream detected at L1 by ACE and DSCOVR on 2026-04-10. The energetic electron flux levels remained elevated through the end of the reporting period.
The energetic proton flux of >10 MeV protons detected at GOES, the flux of one or more of the >15.8 MeV proton channels detected at SOHO, and the 13-100 MeV protons at STEREO A were all at near background levels for the entire reporting period.
Space Weather Impact:
Space weather impacts on NASA spacecraft are expected to have been moderate this reporting period due to the elevated energetic electron flux in the Earth's outer radiation belt described above.
##Events:
Flares (M-class and above)
Date Start Stop Peak Class Location
2026-04-09 08:23:00 09:05:00 08:45:00 M1.0 N01W76 ( 14409 )
CMEs (>500 km/s):
Earth directed:
NONE
Non-Earth directed (POS = Plane Of Sky):
Starting time Speed (km/s) Type Direction (LON/LAT in HEEQ) Half-Angle width (degrees) Detecting spacecraft (real-time)
2026-04-10T06:09Z ~763 C 85/-2 18 STEREO A, SOHO, GOES
2026-04-12T17:23Z ~650 C 138/-3 13 STEREO A, SOHO
2026-04-13T04:00Z ~1065 O 63/-20 10 SOHO
2026-04-13T14:00Z ~670 C 80/-26 10 SOHO, STEREO A, GOES
2026-04-13T18:24Z ~630 C 152/-9 35 SOHO, GOES
2026-04-14T19:12Z ~580 C -51/19 23 SOHO, STEREO A
## Space Weather Outlook:
## Outlook Coverage Begin Date: 2026-04-15T00:00Z
## Outlook Coverage End Date: 2026-04-21T23:59Z
Solar activity is expected to vary between low to moderate levels during the outlook period. There are currently three numbered Active Regions on the Earth-facing disk.
Geomagnetic activity is expected to vary between low to moderate levels during the outlook period. A large coronal hole centered around N05E15 (as seen in available EUV imagery from SDO/AIA 193), with its westernmost extent located around N08W10, may become geoeffective on or around 2026-04-17. The energetic electron flux levels at GOES mentioned above exceeded the threshold of 1000 pfu at 2026-04-10T13:55Z and may continue to be elevated during the outlook period.
## 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 - Continued Radiation Belt Enhancement
##
## Message Issue Date: 2026-04-15T12:30:06Z
## Message ID: 20260415-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 2026-04-15T11:40Z.
The elevated energetic electron flux levels observed since 2026-04-10T13:55Z (see notifications 20260411-AL-001, 20260413-AL-001) are caused by the arrival of a coronal hole high speed stream which started on 2026-04-10, reaching maximum sustained speeds of approximately 620 km/s. The solar wind speed observed at L1 is currently around 340 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 (Mars, Parker Solar Probe, Psyche, BepiColombo)
##
## Message Issue Date: 2026-04-14T00:03:23Z
## Message ID: 20260414-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 GOES / SOHO.
Start time of the event: 2026-04-13T18:24Z.
Estimated speed: ~630 km/s.
Estimated opening half-angle: 35 deg.
Direction (lon./lat.): 152/-9 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-13T18:24:00-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 Mars, Parker Solar Probe, Psyche, and BepiColombo (glancing blow). The leading edge of the CME may reach Mars at 2026-04-17T18:02Z, Parker Solar Probe at 2026-04-16T03:26Z, Psyche at 2026-04-17T23:09Z, and the flank of the CME may reach BepiColombo at 2026-04-15T04:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2026-04-13T18:24:00-CME-001):
