NASA StreaM

https://webtools.ccmc.gsfc.nasa.gov/DONKI/view/GST/45731/-1

## 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. Activity ID: 2026-04-10T13:55:00-RBE-001. ## Notes:

## 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): https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260416_131300_2.0_anim.tim-den.gif https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260416_131300_2.0_anim.tim-vel.gif https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260416_131300_2.0_anim.tim-vel-Stereo_A.gif https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260416_131300_2.0_anim.tim-den-Stereo_A.gif https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260416_131300_2.0_ENLIL_CONE_timeline.gif https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260416_131300_2.0_ENLIL_CONE_STA_timeline.gif https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260416_131300_2.0_ENLIL_CONE_Osiris_timeline.gif https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260416_131300_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

https://webtools.ccmc.gsfc.nasa.gov/DONKI/view/RBE/45621/-1

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - Continued Radiation Belt Enhancement ## ## Message Issue Date: 2026-04-09T09:40:19Z ## Message ID: 20260409-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 2026-04-08T01:10Z. The elevated energetic electron flux levels observed since 2026-04-03T09:05Z (see notifications 20260403-AL-002, 20260405-AL-001, 20260407-AL-001) are likely caused by the coronal hole high speed stream detected by ACE at L1 on 2026-04-02, reaching maximum sustained speeds of approximately 700 km/s. The solar wind speed observed at L1 is currently around 370 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. Activity ID: 2026-04-03T09:05:00-RBE-001. ## Notes:

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - M7.5 Flare ## ## Message Issue Date: 2026-04-04T01:26:42Z ## Message ID: 20260404-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: Significant flare detected by GOES. Flare start time: 2026-04-04T01:07Z. Flare peak time: 2026-04-04T01:17Z. Flare intensity: M7.5 class. Source region: N02W02 (Active Region 14409) (based on SDO and GOES imagery). Increased energetic proton fluxes possible. Updates on this event will be provided when available. Activity ID: 2026-04-04T01:07:00-FLR-001. ## Notes:

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - Geomagnetic Storm ## ## Message Issue Date: 2026-04-03T18:17:47Z ## Message ID: 20260403-AL-005 ## ## 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 6.67 (strong) during the synoptic period 2026-04-03T15:00Z to 2026-04-03T18:00Z. The storm is caused by the Interplanetary Shock with ID 2026-04-03T15:02:00-IPS-001 (see notification 20260403-AL-003) and the arrival of the CME with ID 2026-04-01T23:45:00-CME-001 (see notifications 20260402-AL-001, 20260402-AL-002, 20260402-AL-005). 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: 2026-04-03T15:00:00-GST-001. ## Notes:

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - Interplanetary Shock ## ## Message Issue Date: 2026-04-03T15:50:13Z ## Message ID: 20260403-AL-003 ## ## 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: Significant interplanetary shock detected by ACE at L1 at 2026-04-03T15:02Z. The shock is likely associated with the CME with ID 2026-04-01T23:45:00-CME-001 (see notifications 20260402-AL-001, 20260402-AL-002, and 20260402-AL-005). Magnetospheric compression and geomagnetic storm possible. Activity ID: 2026-04-03T15:02:00-IPS-001. ## Notes: This arrival signature is still developing and analysis is ongoing.

https://webtools.ccmc.gsfc.nasa.gov/DONKI/view/GST/45535/-1

https://webtools.ccmc.gsfc.nasa.gov/DONKI/view/RBE/45529/-1

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - CME update (OSIRIS-APEX, Missions Near Earth) ## ## Message Issue Date: 2026-04-03T00:28:41Z ## Message ID: 20260403-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: Update on CME with ID 2026-04-02T20:46:00-CME-001 (see previous notification 20260402-AL-006). Based on updated 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 OSIRIS-APEX (glancing blow). The flank of the CME may reach OSIRIS-APEX at 2026-04-05T21:00Z (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 southern flank of the CME may reach NASA missions near Earth at about 2026-04-05T20:00Z (plus minus 7 hours). The roughly estimated expected range of the maximum Kp index is 3-4 (below minor). Updated CME parameters are: Start time of the event: 2026-04-02T20:46Z. Estimated speed: ~832 km/s. Estimated opening half-angle: 16 deg. Direction (lon./lat.): 15/20 in Heliocentric Earth Equatorial coordinates. Activity ID: 2026-04-02T20:46:00-CME-001 Links to the movies of the modeled event (includes CME: 2026-04-02T20:46:00-CME-001): https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260402_235300_2.0_anim.tim-den.gif https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260402_235300_2.0_anim.tim-vel.gif https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260402_235300_2.0_ENLIL_CONE_timeline.gif https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260402_235300_2.0_ENLIL_CONE_Osiris_timeline.gif ## Notes: This CME event (2026-04-02T18:48:00-CME-001) is associated with M3.5 flare from Active Region 14044 (N12W18) with ID 2026-04-02T17:23:00-FLR-001 which peaked at 2026-04-02T18:15Z. 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

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - Geomagnetic Storm ## ## Message Issue Date: 2026-04-02T18:16:52Z ## Message ID: 20260402-AL-004 ## ## 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 5.67 (moderate) during the synoptic period 2026-04-02T15:00Z to 2026-04-02T18:00Z. The storm is caused by a coronal hole high speed stream starting on 2026-04-02. 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: 2026-04-02T15:00:00-GST-001. ## Notes:

https://webtools.ccmc.gsfc.nasa.gov/DONKI/view/GST/45511/-1

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - Continued Radiation Belt Enhancement ## ## Message Issue Date: 2026-04-01T16:08:12Z ## Message ID: 20260401-AL-004 ## ## 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 2026-04-01T13:10Z. The elevated energetic electron flux levels observed since 2026-03-31T14:20Z are caused by a coronal hole high speed stream which arrived on 2026-03-29, reaching maximum sustained speeds of approximately 490 km/s. 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. Activity ID: 2026-03-31T14:20:00-RBE-001. ## Notes: Previously elevated energetic electron flux levels observed since 2026-03-22T14:15Z (see notifications 20260322-AL-003, 20260324-AL-001, 20260326-AL-001, 20260328-AL-002, and 20260330-AL-007) were likely caused by the combined arrival of the CMEs with IDs 2026-03-17T05:08:00-CME-001, 2026-03-17T06:38:00-CME-001, 2026-03-17T08:23:00-CME-001, and 2026-03-17T10:53:00-CME-001 (see notification 20260320-AL-001), as well as the arrival of CME with ID 2026-03-18T09:23:00-CME-001 (see notifications 20260318-AL-002, 20260318-AL-003, and 20260320-AL-004), and the arrival of a coronal hole high speed stream starting on 2026-03-21.

https://webtools.ccmc.gsfc.nasa.gov/DONKI/view/RBE/45469/-1

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - Continued Radiation Belt Enhancement ## ## Message Issue Date: 2026-03-30T16:34:58Z ## Message ID: 20260330-AL-007 ## ## 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 2026-03-30T14:25Z. The elevated energetic electron flux levels observed since 2026-03-22T14:15Z (see notifications 20260322-AL-003, 20260324-AL-001, 20260326-AL-001, 20260328-AL-002) are likely caused by the combined arrival of the CMEs with IDs 2026-03-17T05:08:00-CME-001, 2026-03-17T06:38:00-CME-001, 2026-03-17T08:23:00-CME-001, and ID 2026-03-17T10:53:00-CME-001 (see notification 20260320-AL-001), as well as the arrival of CME with ID 2026-03-18T09:23:00-CME-001 (see notifications 20260318-AL-002, 20260318-AL-003, and 20260320-AL-004), and the arrival of a coronal hole high speed stream starting on 2026-03-21, reaching a maximum speed of approximately 700km/s. The solar wind speed observed at L1 is currently around 450km/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. Activity ID: 2026-03-22T14:15:00-RBE-001. ## Notes: The arrival of the CME with ID 2026-03-18T09:23:00-CME-001 was associated with geomagnetic storm with ID 2026-03-20T18:00:00-GST-001 and modeled magnetopause crossing with ID 2026-03-20T21:13:00-MPC-001. The arrival of the coronal hole high speed stream starting on 2026-03-21 was associated with a strong geomagnetic storm with ID 2026-03-22T09:00:00-GST-001.

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - X1.4 Flare ## ## Message Issue Date: 2026-03-30T03:46:43Z ## Message ID: 20260330-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: Significant flare detected by GOES. Flare start time: 2026-03-30T02:47Z. Flare peak time: 2026-03-30T03:19Z. Flare intensity: X1.4 class. Source region: S27E45 (Active Region 14405) (based on SDO imagery). Increased energetic proton fluxes possible. Updates on this event will be provided when available. Activity ID: 2026-03-30T02:47:00-FLR-001. ## Notes: This flare is associated with the CME first seen in SOHO LASCO C2 at 2026-03-29T03:24Z. Updates on this event will be provided when available.

## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI ) ## Message Type: Space Weather Notification - Geomagnetic Storm ## ## Message Issue Date: 2026-03-22T18:08:28Z ## Message ID: 20260322-AL-004 ## ## 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: Intensifying space weather storm in the Earth's magnetosphere. Geomagnetic Kp index has reached level 6.67 (strong) during the synoptic period 2026-03-22T15:00Z to 2026-03-22T18:00Z. The storm is likely caused by the arrival of a coronal hole high speed stream starting on 2026-03-21. 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: 2026-03-22T09:00:00-GST-001. ## Notes:

https://webtools.ccmc.gsfc.nasa.gov/DONKI/view/RBE/45238/-1