A halo coronal mass ejection (CME) was observed in SOHO/LASCO-C2 images at 12:48 UTC on Oct 03. This CME was associated with an X9.0 flare, which peaked at 12:18 UTC on Oct 03, produced by the SIDC Sunspot Group 257 (NOAA AR 3842, S15 W03) and also associated with the EUV wave. Associated type IV and type II radio emissions were detected at 12:17 UTC and 12:18 UTC, respectively, during this flaring activity. With its source region located closer to the central meridian, it is expected to impact the Earth on Oct 05.

A class M6.7 solar X-ray flare occurred on 2024/10/03 with peak time 20:28UT

A halo or partial-halo CME was detected with the following characteristics: t0 | dt0| pa | da | v | dv | minv| maxv| 2024-10-03T15:36:07.408 | 6.0 | 245 | 256 | 1562 | 774 | 197 | 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 high over the past 24 hours, with few C-class flares and 7 M-class flares identified. The largest flare was a M3.3 flare (SIDC Flare 2200) peaking on October 02 at 20:51 UTC, which was produced by SIDC Sunspot Group 257 (NOAA Active Regions 3823, 3842). During the flare, the source region (SIDC 257; AR 3823, 3842) of the flare had beta-gamma-delta configuration of its photospheric magnetic field. A total of 10 numbered sunspot groups were identified on the disk over the past 24 hours. SIDC 257 currently located at S15 E06 has a beta-gamma-delta magnetic configuration and was growing over the past 24 hours. Solar flaring activity is expected to be high over the next 24 hours, with M-class flares very likely and a chance for X-class flares. Further analysis of a coronal mass ejections (CME), detected at 23:12 UTC on Oct 01 in LASCO C2 data with a projected speed of 600 km/s and a projected width of 119 degree, shows a possible impact at Earth on Oct 04-05. This CME was associated with an X7.1 flare from SIDC Sunspot Group 257 (NOAA Active Region 3842, S16 E16), which peaked at 22:20 UTC on Oct 01, and the EUV wave. Associated type II radio emissions were also detected at 22:17 UTC on Oct 01. Another CME was first observed on coronograph images around 08:34 UTC on Oct 03. This was associated to a filament eruption on the NW quadrant of the Sun, and also possibly associated with the flaring activities from the SIDC 277 (NOAA AR 3848). The analysis of presently available coronograph images shows that this CME has a projected width of about 100 deg and a projected speed of about 525 km/s. With the bulk of the mass strongly directed towards NE limb, this CME will miss Earth, but a glancing blow related to the shock may be possible on Oct 06. No other Earth-directed CMEs were detected in the available coronagraph observations during last 24 hours. The greater than 10 MeV GOES proton flux was below the threshold level over the past 24 hours. It is expected to remain so during the next 24 hours. The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, was below the threshold level over the past 24 hours and is expected to remain so in the coming 24 hours. The 24h electron fluence is presently at normal level, and it is expected to remain so in the next 24 hours.

Geomagnetic conditions were globally quiet (NOAA Kp 1 to 2) and locally at quiet to unsettled conditions (K_BEL 1 to 3). Quiet to unsettled conditions are expected in the next 24 hours, unless the coronal mass ejection that was observed lifting from the Sun on Oct 01 arrives earlier than expected. Earth is presently within the slow solar wind regime. The solar wind speed ranged from 300 km/s to 400 km/s and the interplanetary magnetic field ranged from 3 nT to 7 nT. Similar conditions can be expected for the next 24 hours, unless the coronal mass ejection that was observed lifting from the Sun on Oct 01 arrives earlier than expected.