Solar flaring activity over the last 24 hours has been at low levels, with multiple C-class flares. The largest flare was an C3.9 flare (SIDC Flare 3614) peaking at 00:05 UTC on February 15, associated with SIDC Sunspot Group 405 (NOAA Active Region 3996, magnetic type beta). There are currently ten numbered active regions on the solar disk. The most complex ones are SIDC Sunspot Groups 346 and 399 (NOAA Active Regions 3990 and 3992), both of magnetic type beta-gamma. SIDC Sunspot Group 408 (NOAA Active Region 3998, magnetic type beta) has emerged in the northeast quadrant, east of SIDC Sunspot Group 404 (NOAA Active Region 3997). A new, currently unnumbered active region emerged in the southeast quadrant, east of SIDC Sunspot Group 405 (NOAA Active Region 3996). SIDC Sunspot Groups 378 and 399 (NOAA Active Regions 3986 and 3992) are rotating behind the west limb. The two unnumbered active regions that emerged in the northwest quadrant on February 15 have decayed into plage. The solar flaring activity is expected to be at moderate levels over the next 24 hours, with M-class flares probable.
Further analysis of the Coronal Mass Ejections (CMEs) observed in LASCO/C2 coronagraph imagery at 22:00 UTC on February 14, 01:36 UTC on February 15 suggest no impact on Earth. A wide CME was observed in LASCO/C2 coronagraph imagery at 13:25 UTC on February 15, lifting off the south limb with an estimated speed of 1255 km/s. It is a backsided event and it is not expected to impact the Earth. A narrow CME was observed in LASCO/C2 coronagraph imagery around 10:15 UTC on February 16, lifting off the northwest limb. It is possibly associated with eruptive activity northwest of SIDC Sunspot Group 402 (NOAA Active Region 3993). Preliminary analysis suggests that a mild glancing blow may arrive at Earth starting from 08:00 UTC on February 20. A filament eruption was observed in SDO/AIA 304 data around 22:20 UTC on February 15 near SIDC Sunspot Group 404 (NOAA Active Region 3997). An associated narrow CME was observed in LASCO/C2 coronagraph imagery around 23:35 UTC on February 15, lifting off the east limb. It is not expected to impact the Earth. A second filament eruption was observed in SDO/AIA 304 around 02:00 UTC on February 16 near the west limb. No associated CME was observed. No Earth-directed CMEs were observed in the available coronagraph imagery.
A northern, mid-latitude, positive polarity coronal hole (SIDC Coronal Hole 91) is crossing the central meridian. An associated high-speed stream may arrive at Earth starting from February 19.
The greater than 10 MeV proton flux was below the threshold level over the past 24 hours. It is expected to remain below the threshold level over the next 24 hours.
The greater than 2 MeV electron flux measured by GOES 16 was above the threshold level between 12:00 UTC and 19:35 UTC on February 15 and has since remained close to the threshold. The greater than 2 MeV electron flux measured by GOES 18 was above the threshold level between 15:45 UTC on February 14 and 02:25 UTC on February 15 and has since remained close to the threshold. The 24-hour electron fluence is currently at moderate levels and is to remain so in the next 24 hours.