Summary and Forecast

Solar Summary

(last updated 11 Jun 2025 23:30 UT)

Activity 11 Jun: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 11 Jun: 141/95

Solar Forecast

(last updated 11 Jun 2025 23:30 UT)

12 Jun 13 Jun 14 Jun Activity R0-R1, chance R2 R0-R1, chance R2 R0-R1, chance R2 Fadeouts Possible Possible Possible 10.7cm/SSN 120/72 120/72 120/72 COMMENT: Solar activity on UT day 11-Jun was R0, with no solar flares. There are currently six numbered sunspot regions on the solar disk. AR4105 (S15W26, beta-gamma) has shown dramatic growth over the past day, but has remained quiet so far. AR4110 (N05W11, beta) has shown some slight growth, and all other sunspot regions are either stable or in decay. Solar activity is expected to be R0-R1 over 12-14 Jun, with a chance for R2 events from AR4105. No Earth-directed CMEs were observed on UT day 11-Jun. A small filament erupted from 1739 UT from near AR4105. Further imagery is required to determine if there is an Earth-directed CME associated with it. S0 solar radiation storm conditions were observed on UT day 11-Jun. S0 solar radiation storm conditions are expected over 12-14 Jun. The solar wind environment on UT day 11-Jun was mildly disturbed, possibly due to a connection with a small coronal hole or co-rotating interaction region. The solar wind speed ranged from 419 to 473 km/s. The peak total interplanetary field strength (IMF, Bt) was 11 nT and the north-south IMF component range was +7 to -10 nT with a period of sustained southward Bz at the end of the day. The solar wind environment is expected to remain mildly enhanced on 12-Jun, before declining to background levels over 13-14. Another coronal hole may connect at the end of the period, however, causing an increase to the solar wind speed.

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