Message ID: 20260506-7D-001
Issue Time: 2026-05-06T19:41Z
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information (CCMC DONKI)
## Message Type: Weekly Space Weather Summary Report for April 29, 2026 - May 05, 2026
##
## Message Issue Date: 2026-05-06T19:41:01Z
## Report Coverage Begin Date: 2026-04-29T00:00Z
## Report Coverage End Date: 2026-05-05T23:59Z
## Message ID: 20260506-7D-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 low to moderate levels during this reporting period with 1 M-class flare 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)
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2026-05-02T11:24Z Parker Solar Probe at 2026-05-04T16:21Z, STEREO A at 2026-05-06T00:00Z (glancing blow) (see notification 20260502-AL-001).
Geomagnetic activity was at moderate levels with Kp index (a measure of geomagnetic activity, ranging 0-9) <= 6.33 for the reporting period. The highest value of Kp = 6.33 occurred during the synoptic period 2026-05-04T18:00Z to 2026-05-04T21:00Z (see notifications 20260504-AL-001, 20260504-AL-002). This enhancement in geomagnetic activity was associated with the interplanetary shock detected at L1 by ACE at 2026-05-04T04:10Z, which was associated with the combined arrival of the S-type CME first seen in STEREO A COR2 at 2026-04-30T12:38Z and the S-type CME first seen in SOHO LASCO C2 at 2026-04-30T18:24Z.
The > 2.0 MeV energetic electron flux detected at GOES remained below the threshold level of 1000 pfu for the entire reporting period.
The energetic proton flux of >10 MeV protons detected at GOES and the 13-100 MeV protons at STEREO A were all at background levels for the entire reporting period.
Space Weather Impact:
Space weather impacts on NASA spacecraft are expected to have been low this reporting period.
##Events:
Flares (M-class and above)
Date Start Stop Peak Class Location
2026-05-04 01:13:00 01:44:00 01:33:00 M1.8 N17W80 ( 14424 )
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)
2026-04-29T00:00Z ~790 C -26/20 10 SOHO
2026-04-30T06:24Z ~634 C -74/-22 11 SOHO, STEREO A, GOES
2026-05-01T15:28Z ~515 C -61/-17 23 SOHO, STEREO A, GOES
2026-05-02T11:24Z ~603 C 92/16 20 SOHO, STEREO A, GOES
2026-05-03T03:28Z ~581 C -168/46 10 SOHO, STEREO A
## Space Weather Outlook:
## Outlook Coverage Begin Date: 2026-05-06T00:00Z
## Outlook Coverage End Date: 2026-05-12T23:59Z
Solar activity is expected to vary between low to moderate levels during the outlook period. There are currently eight numbered Active Regions on the Earth-facing disk.
Geomagnetic activity is expected to vary between low to moderate levels during the outlook period. A coronal hole (as seen in available EUV imagery from SDO/AIA 193) centered around N00W28 may become geoeffective on or around May 7th.
## 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 ID: 20260504-AL-002
Issue Time: 2026-05-04T21:17Z
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - Geomagnetic Storm
##
## Message Issue Date: 2026-05-04T21:17:52Z
## Message ID: 20260504-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:
Ongoing space weather storm in the Earth's magnetosphere. Geomagnetic Kp index has reached level 6.33 (moderate) during the synoptic period 2026-05-04T18:00Z to 2026-05-04T21:00Z.
The storm is caused by the Interplanetary Shock with ID 2026-05-04T04:10:00-IPS-001 and the arrival of CME with ID 2026-04-30T12:38:00-CME-001 and/or CME with ID 2026-04-30T18:24:00-CME-001.
NASA spacecraft at GEO, MEO, polar and other orbits passing through or in the vicinity of the Earth's ring current and auroral regions can be impacted.
Activity ID: 2026-05-04T18:00:00-GST-001.
## Notes:
URL: View Details
Message ID: 20260504-AL-001
Issue Time: 2026-05-04T21:03Z
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Auto-generated Space Weather Notification - Geomagnetic Storm
##
## Message Issue Date: 2026-05-04T21:03:41Z
## Message ID: 20260504-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:
Ongoing space weather storm in the Earth's magnetosphere. Geomagnetic Kp index has reached level 6.33 (moderate) during the synoptic period 2026-05-04T18:00Z to 2026-05-04T21:00Z.
NASA spacecraft at GEO, MEO, polar and other orbits passing through or in the vicinity of the Earth's ring current and auroral regions can be impacted.
Activity ID: 2026-05-04T18:00:00-GST-001.
## Notes:
URL: View Details