CME ScoreBoard Header

CME Scoreboard

CME Scoreboard: Prediction Detail

Prediction for CME (2023-05-07T23:12:00-CME-001)

CME Observed Time: 2023-05-07T23:12Z
CME Note: This CME is visible as a partial halo to the NW in SOHO LASCO C2/C3 and STEREO A COR2 imagery. The source is likely an eruption and subsequent long duration M1.6 flare from AR 3296 starting around 2023-05-07T22:15Z in SDO AIA 131, 171, 193, 304 imagery. An opening of field lines is visible at the time of the eruption with post eruptive dimming and arcades visible starting around 23:45Z in SDO AIA 193 and STEREO A EUVI 195 imagery. The arrival signature at L1 is characterized by jumps in B_total to >15nT, solar wind speed to >550km/s, temperature >600K, and density >15 N(cm^-3). The CME might have arrived at STEREO A at 2023-05-09T19:00Z. From LASSOS team discussion: CME shock arrives on 6/9 and arrival signature ends ~2023-05-10T21:00Z. (It is possible that there are two close arrivals in this signature, with the second shock around 2023-05-10T05Z).
CME Shock Arrival Time: 2023-05-09T22:06Z
Observed Geomagnetic Storm Parameters due to CME:
Max Kp: 5.37

Predicted Arrival Time: 2023-05-10T07:00Z (-7.0h, +7.0h)
Prediction Method: EAM (Effective Acceleration Model)
Prediction Method Note:
% Compiled module: EAM
Most pr. speed = 1494.0 km/sec
The EAM version you are running is: v3
Utilizing the upgraded version EAM_v3 [Paouris et al. 2021 - DOI: 10.1007/s11207-020-01747-4]
u_r =      856.842
Acceleration:      -1.12922
Duration in seconds:        200917.79
Duration in days:        2.3254374
Acceleration of the CME:  -1.13 m/s^2
Velocity of the CME at 1 AU:  630.0 km/s
Expected date and time for the arrival of the CME: 10/05/2023 Time: 07:00 UT
Lead Time: 25.78 hour(s)
Difference: -8.90 hour(s)
Prediction submitted by Evangelos Paouris (UoA) on 2023-05-08T20:19Z
CME Scoreboard Footer

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 ( 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 | CCMC Data Collection Consent Agreement