Solar
FORECAST SOL: Normal green MAG: Moderate yellow ION: Normal green
HomeSolarSolar ConditionsSummary and Forecast Sunday, Jul 12 2026 22:27 UT
Solar Conditions

Summary and Forecast

Solar Summary

(last updated 11 Jul 2026 23:30 UT)

Activity 11 Jul: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 11 Jul: 112/63

Solar Forecast

(last updated 11 Jul 2026 23:30 UT)

12 Jul 13 Jul 14 Jul Activity R0, chance of R1 R0, chance of R1 R0 Fadeouts None expected None expected None expected 10.7cm/SSN 105/54 105/54 115/66 COMMENT: Solar flare activity on UT day 11-Jul was at the R0 level, with no significant flares observed throughout the UT day. There are currently four sunspot regions on the disk, with Active Region (AR) 4482 (S08W19, beta) being the largest. This spot has shown decay in trailing spots over the previous UT day. Previously flare-active region 4485 (S09W72, beta) has remained largely stable over 11-Jul, and will soon rotate off the visible solar disk. A new region, AR 4488, appeared during the past UT day at N23W12, and currently exhibits a beta magnetic classification. Solar flare activity is forecast at the R0 level, with a chance of R1 over 12-13 Jul given the flare history of AR 4485. This will decrease to R0 on 14-Jul as this region moves off the visible disk. S0 solar radiation storm conditions were observed on 11-Jul, with S0 conditions forecast for 12-14 Jul. No new geoeffective coronal mass ejections (CMEs) have been observed over the past 24 hours in available coronagraph imagery. The solar wind speed slowly declined across the first half of UT day 11-Jul as the effects of a coronal hole high speed wind stream waned. The solar wind speed began the day at 580 km/s, declining to 490 km/s. The solar wind speed then slowly increased after 11/1500UT, and is currently ranging between 530-550 km/s. The interplanetary magnetic field strength (IMF, Bt) peaked at 7 nT, with the north-south component (Bz) ranging between -4 and +4 nT over the UT day. The solar wind speed is forecast to rise on 12-Jul due to a glancing impact of a CME first observed on 09-Jul, before declining over 13-14 Jul.

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

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