CME
3 Apr 2026, 00:28 GMT
Topic: space_weather
## 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