Message Type: Report
Message ID: 20260729-7D-001
Issue Time: 2026-07-29T20:04Z
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information (CCMC DONKI)
## Message Type: Weekly Space Weather Summary Report for July 22, 2026 - July 28, 2026
##
## Message Issue Date: 2026-07-29T20:04:15Z
## Report Coverage Begin Date: 2026-07-22T00:00Z
## Report Coverage End Date: 2026-07-28T23:59Z
## Message ID: 20260729-7D-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 3 M-class flares and 13 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 missions near Earth:
CME Starting time | Predicted Impacts (plus minus 7 hours)
-----------------------------------------------------------------------------
2026-07-24T04:38Z NASA missions near Earth at 2026-07-26T19:25Z, Kp index 4-6 (below minor to moderate)
(see notifications 20260724-AL-001, 20260725-AL-001).
Ensemble: https://iswa.gsfc.nasa.gov/ENSEMBLE/2026-07-24_ncmes1_sims35_M2M-SWAO095/Detailed_results_20260724_043800_ncmes1_sims35_M2M-SWAO095.txt
The arrival of this CME was likely detected at L1 around 2026-07-27T15:27Z.
It was also estimated that the following CMEs were predicted to impact the listed locations:
CME Starting time | Predicted Impacts (plus minus 7 hours)
-----------------------------------------------------------------------------
2026-07-24T04:38Z OSIRIS-APEX at 2026-07-27T15:20Z, Parker Solar Probe at 2026-07-26T00:34Z, BepiColombo at 2026-07-25T04:00Z (glancing blow), Europa Clipper at 2026-07-27T12:00Z (glancing blow), Juice at 2026-07-27T18:00Z (glancing blow) (see notifications 20260724-AL-001, 20260725-AL-001).
2026-07-24T12:48Z Solar Orbiter at 2026-07-25T21:58Z (see notification 20260724-AL-004).
2026-07-25T07:23Z BepiColombo at 2026-07-26T04:00Z (glancing blow), Parker Solar Probe at 2026-07-27T10:00Z (glancing blow) (see notification 20260726-AL-001).
2026-07-26T20:26Z Lucy at 2026-08-12T00:00Z (minor impact).
2026-07-27T07:09Z Europa Clipper at 2026-07-31T08:00Z (glancing blow), OSIRIS-APEX at 2026-07-31T08:00Z (glancing blow) (see notification 20260727-AL-001).
Geomagnetic activity was at minor levels with Kp index (a measure of geomagnetic activity, ranging 0-9) <= 5.33 for the reporting period. The highest value of Kp = 5.33 occurred during the synoptic period 2026-07-23T15:00Z to 2026-07-23T18:00Z. This enhancement in geomagnetic activity was associated with the arrival of the coronal hole high speed stream detected by SOLAR-1 at L1 on 2026-07-22.
The > 2.0 MeV energetic electron flux in the Earth's outer radiation belt crossed the threshold level of 1000 pfu starting at 2026-07-24T13:40Z (see notifications 20260724-AL-002, 20260724-AL-003, 20260726-AL-002). This elevation of energetic electron flux levels was likely associated with the arrival of the coronal hole high speed stream detected by SOLAR-1 at L1 on 2026-07-22. The energetic electron flux returned to background levels on 2026-07-28.
The energetic proton flux of >10 MeV protons detected at GOES, the flux of one or more of the >15.8 MeV proton channels at SOHO, and the 13-100 MeV protons at STEREO A were at 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
2026-07-22 06:27:00 06:37:00 06:35:00 M3.6 N07W05 ( 14493 )
2026-07-26 15:17:00 15:32:00 15:28:00 M3.2 S05E03 ( 14494 )
2026-07-27 02:37:00 02:48:00 02:43:00 M1.0 S05W04 ( 14494 )
CMEs (>500 km/s):
Earth directed:
Starting time Speed (km/s) Type Direction (LON/LAT in HEEQ) Half-Angle width (degrees) Detecting spacecraft (real-time)
2026-07-24T04:38Z ~794 C -10/-19 31 STEREO A, SOHO, GOES
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)
2026-07-23T19:00Z ~522 C -153/57 34 SOHO, STEREO A, GOES
2026-07-24T12:48Z ~714 C -134/-23 41 SOHO, STEREO A, GOES
2026-07-25T02:00Z ~531 C 50/-34 10 SOHO, GOES
2026-07-25T07:23Z ~695 C 30/30 15 STEREO A
2026-07-26T20:26Z ~501 C -92/34 44 SOHO, GOES
2026-07-27T07:09Z ~578 C -43/23 20 STEREO A, GOES
2026-07-27T14:30Z ~927 C 80/-22 10 GOES
2026-07-27T14:48Z ~545 C -75/12 13 SOHO, STEREO A, GOES
2026-07-27T15:12Z ~775 C -73/35 11 SOHO, STEREO A, GOES
2026-07-27T17:24Z ~518 C NONE(POS)/26 10 SOHO, GOES
2026-07-27T23:48Z ~844 C -75/36 11 SOHO, STEREO A, GOES
2026-07-28T01:26Z ~546 C -66/34 19 SOHO, STEREO A, GOES
## Space Weather Outlook:
## Outlook Coverage Begin Date: 2026-07-29T00:00Z
## Outlook Coverage End Date: 2026-08-04T23:59Z
Solar activity is expected to vary between low and moderate levels during the outlook period. There are currently nine numbered Active Regions on the Earth-facing disk. Active Region 14498 (N14E52) has produced C-class flaring activity in the reporting period and may continue to produce similar levels of flaring activity during the outlook period.
Geomagnetic activity is expected to be at low levels during the outlook period. The northwestern extent of a southern polar coronal hole (reaching approximately S30W55) which started crossing the central meridian on 2026-07-26 (as seen in available imagery from SDO/AIA 193) may reach geoeffective longitudes on or around 2026-07-29.
## 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
URL: View Details
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)
##
## Message Issue Date: 2026-07-27T15:46:46Z
## Message ID: 20260727-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.
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):
https://iswa.gsfc.nasa.gov/api/redirect?filename=20260727_140200_2.0_anim.tim-den.gif
https://iswa.gsfc.nasa.gov/api/redirect?filename=20260727_140200_2.0_anim.tim-vel.gif
https://iswa.gsfc.nasa.gov/api/redirect?filename=20260727_140200_2.0_ENLIL_CONE_timeline.gif
https://iswa.gsfc.nasa.gov/api/redirect?filename=20260727_140200_2.0_ENLIL_CONE_Osiris_timeline.gif
https://iswa.gsfc.nasa.gov/api/redirect?filename=20260727_140200_2.0_ENLIL_CONE_EuropaClippr_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
URL: View Details
GIFs:
