Summary and Forecast

Solar Summary

(last updated 10 Jun 2026 23:30 UT)

Activity 10 Jun: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 10 Jun: 124/77

Solar Forecast

(last updated 10 Jun 2026 23:30 UT)

11 Jun 12 Jun 13 Jun Activity R0-R1 R0-R1 R0-R1 Fadeouts Possible Possible Possible 10.7cm/SSN 130/84 128/81 128/81 COMMENT: Solar activity on UT day 10-Jun was R0, with no solar flares. There are currently six numbered sunspots on the solar disk. Active sunspot region (AR) 4461 (S13W02, beta) has shown some minor changes throughout the day. All other sunspot regions are either stable or in decay. Solar activity is expected to be R0-R1 over 11-13 Jun. No Earth directed CMEs were observed in available images. S0 solar radiation storm conditions were observed on UT day 10-Jun. S0 solar radiation storm conditions are expected over 11-13. The solar wind environment on UT day 10-Jun was near background levels. The solar wind speed ranged between 450-360 km/s and is currently steady. The peak total interplanetary field strength (IMF, Bt) was 7 nT and the north-south IMF component range (Bz) was +5 to -5 nT. The solar wind speed is expected to begin increasing by either late 11-Jun or else on 12-Jun due to a recurring coronal hole.

Solar Activity levels are explained in the SWS Solar Terrestrial Glossary.