CCMC CME Scoreboard
Prediction for CME (2026-04-30T18:24:00-CME-001)
CME Observed Time: 2026-04-30T18:24ZDONKI Link: https://kauai.ccmc.gsfc.nasa.gov/DONKI/view/CME/45936/-1
CME Note: Second of two faint, wide CMEs seen to the south-southwest in SOHO LASCO C2 and to the southeast more prominently in STEREO A COR2; the source could be associated with a minor eruption in 14428 (~S24W11), with a slowly varying dimming signature starting after 18:00Z best viewed in SDO composite imagery, particularly the 304/211/171 Angstrom imager. Follows shortly behind CME: 2026-04-30T12:38Z which has a similar appearance. Triangulation between the SOHO and STEREO A spacecraft strongly suggests a front-sided source location, though the source is relatively uncertain. CME arrival characterized by rapid magnetic field enhancement from 4 to 8 nT near 2026-05-04T04:10Z, a slow gradual rise to above 10 nT, and separation in magnetic field components after 2026-05-04T15:00Z until approximately 2026-05-06T04:00Z. Enhancements in solar wind density and small increases and decreases in velocity and temperature, respectively, were also observed.
CME Shock Arrival Time: 2026-05-04T04:10Z
Observed Geomagnetic Storm Parameters due to CME:
----
Predicted Arrival Time: 2026-05-05T06:00Z
Predicted geomagnetic storm max Kp range due to CME: 2.0 - 4.0
Prediction Method: Median of all Methods
Prediction Method Note:
This is the auto generated median of all submitted predictions for this CME.Lead Time: 77.32 hour(s)
Difference: -25.83 hour(s)
Prediction submitted by Auto Generated (CCMC) on 2026-04-30T22:51Z
CCMC
Rules of the Road: CCMC requests that users notify the CCMC, CME
model/technique developers and submitting forecasters/researchers before
performing event and validation studies with data from the CME Arrival
Time Scoreboard. It is recommended that such studies be performed with
the knowledge and collaboration of developers and submitting
forecasters/researchers.
If you are looking for the official U.S. Government forecast for space weather, please go to NOAA's Space Weather Prediction Center (https://swpc.noaa.gov). This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.
Curator: Chiu Wiegand | NASA Official: Dr. Masha Kuznetsova | Privacy and Security Notices | Accessibility | CCMC Data Policy