Space Weather Forecast - Discussion

Issued: 2026 Jun 24 1230 UTC
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center and processed by SpaceWeatherLive.com

Solar activity

24 h Summary

Solar activity returned to low levels, with frequent high B-level/low C-level activity mostly on the East limb. The largest flare of the period was a partially occulted C8.7 flare on the East limb at 23/2325 UTC. Regions 4472 (S14E08, Cri/beta) and 4473 (S09E19, Hrx/alpha) exhibited substantial decay and fragmentation this period. Region 4470 (N07W31, Bxo/beta) decayed nearly to plage. Region 4478 (S05E77, Hsx/alpha) was numbered this period. A large farside eruption was observed to the northeast and is first visible in SOHO LASCO C2 imagery at 23/1848 UTC and GOES CCOR1 imagery at 23/2000 UTC. An additional CME was observed near 24/0148 UTC off the NE. This ejecta does appear to be from the Earth-facing side of the disk. However, due to its far NE origin, an Earth-directed component is unlikely.

Forecast

Solar activity is expected to continue at predominately low levels on 24-26 Jun, with an increasing chance for M-class (R1-R2/Minor-Moderate) flares primarily due to the potential of the farside region(s) anticipated to soon rotate onto the visible disk.

Energetic Particles

24 h Summary

The greater than 2 MeV electron flux was at normal to moderate levels. The greater than 10 MeV proton flux was at background levels.

Forecast

The greater than 2 MeV electron flux is expected to continue at normal to moderate levels over 24-26 Jun. The greater than 10 MeV proton flux is expected to persist at background levels through 26 Jun.

Solar Wind

24 h Summary

Solar wind parameters were at background levels for the majority of the reporting period, with total magnetic field strength (Bt) at or below 6 nT, no significant periods of southward Bz, phi largely negative, and solar wind speeds approximately 350 km/s. At 23/1056 UTC, a magnetic transient began passing through the near-Earth environment: Bt began increasing and eventually reached 12 nT after 24/00 UTC, when the wind speed also increased to approximately 425 km/s, with Bz deflecting northward and maintaining an average of ~+5 nT for several hours.

Forecast

Enhanced solar wind conditions are expected to prevail through 26 Jun due to the anticipated onset of negative polarity CH HSS influences and a potential minor glancing blow from a CME that left the Sun on 20 Jun.

Geospace

24 h Summary

The geomagnetic field was at quiet to unsettled levels.

Forecast

Periods of active conditions are likely through 26 Jun due to the anticipated onset of negative polarity CH HSS and glancing blow influences.