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"A halo or partial-halo CME was detected with the following characteristics: t0 | dt0| pa | da | v | dv | minv| maxv| 2026-09-25T12:36:22.541 | 2.0 | 225 | 228 | 1798 | 150 | 1250 | 2015 t0: onset time, earliest indication of liftoff dt0: duration of liftoff (hours) pa: principal angle, counterclockwise from North (degrees) da: angular width of the CME (degrees), v: median velocity (km/s) dv: variation (1 sigma) of velocity over the width of the CME mindv: lowest velocity detected within the CME maxdv: highest velocity detected within the CME"

"Solar flaring activity was low over the past 24 hours, with only C-class flares identified. The largest flare was a C1.3 flare (SIDC Flare 8615) peaking on September 27 at 19:05 UTC, which was produced by SIDC Sunspot Group 962 (NOAA Active Region 4535). During the flare, the source region (SIDC Sunspot Group 962) of the flare had Beta configuration of its photospheric magnetic field. A total of 4 numbered sunspot groups were identified on the disk over the past 24 hours. Solar flaring activity is expected to be low over the next 24 hours, with C-class flares likely and a small chance for M-class flares. No Earth-directed coronal mass ejections (CMEs) were detected in the available coronagraph observations during the last 24 hour. The greater than 10 MeV GOES proton flux was below the threshold level over the past 24 hours and it is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux, as measured by GOES-18 and GOES-19 satellites, remained mostly above the 1000 pfu threshold level during the past 24 hours and is expected to remain so. It was possibly due to the enhanced solar wind speed on previous days. The 24h electron fluence was at moderate levels during the past 24 hours and is expected to remain so."

"Geomagnetic conditions were globally and locally at quiet (NOAA Kp and K BEL 1 to 2). Quiet to unsettled conditions are expected in the next 24 hours. Earth is presently within the slow solar wind regime, with speed around 340 km/s and interplanetary magnetic field around 5 nT. Slow solar wind conditions are expected to continue over the next 24 hours."

"The SIDC monitors the level of solar activity from the photosphere to the corona with ground based instruments located in Uccle and Humain."

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