Solar flaring activity over the past 24 hours was at very high levels with multiple M-class flares and an X2.0-flare with start time 21:12 UTC, end time 21:27 UTC, peak time 21:20 UTC on Oct 31st, associated with SIDC Sunspot Group 217 (NOAA Active Region 3878). There are eleven numbered active regions on the visible solar disc with SIDC Sunspot Group 217 (NOAA Active Region 3878) and SIDC Sunspot Group 273 (NOAA Active Region 3869) being the largest and most complex ones, classified as magnetic type beta-gamma-delta. SIDC Sunspot Group 217 (NOAA Active Region 3878) was responsible for most of the of flaring activity together with SIDC Sunspot Group 298 (NOAA Active Region 3876, magnetic type beta-gamma) and an isolated low M-class flaring contribution from SIDC Sunspot Group 297 (NOAA Active Region 3875, magnetic type beta), which exhibited further growth. The solar flaring activity is likely to be at moderate to high levels over the coming days with likely M-class flaring and 35% chances for X-flares.
No Earth-directed coronal mass ejections (CMEs) have been detected in the available coronagraph imagery over the past 24 hours.
Over the past 24 hours the greater than 10 MeV GOES proton flux has gradually decreased bellow the 10 pfu minor radiation storm threshold with an intermediate enhancement possibly related to the observed X-class flaring. The greater than 10 MeV GOES proton flux is expected to decrease towards nominal levels over the 24 hours with chances for new enhancements related to anticipated high levels of solar eruptive activity.
The greater than 2 MeV electron flux as measured by GOES 16 and GOES 18 was below the 1000 pfu threshold and could reach the 1000 pfu threshold over the next 24 hours. The 24h electron fluence was at nominal levels and is expected to remain so in the next 24 hours.