Summary and Forecast

Solar Summary

(last updated 14 Mar 2026 23:30 UT)

Activity 14 Mar: R0 Flares: None. Observed 10.7 cm flux/Equivalent Sunspot Number for 14 Mar: 112/63

Solar Forecast

(last updated 14 Mar 2026 23:30 UT)

15 Mar 16 Mar 17 Mar Activity R0,chance R1 R0,chance R1 R0,chance R1 Fadeouts Possible Possible Possible 10.7cm/SSN 110/60 110/60 110/60 COMMENT: Solar activity on UT day 14-Mar was R0, with no significant flare activity observed. Solar region AR4384 has rotated over the northwest limb and produced low level C class flare activity. Medium sized solar region AR4392 (S15E46, beta) is now the largest region on the visible solar disk and has shown an increase in the number of small spots surrounding its larger main spot. To the northeast of this region are two small regions both of which have shown growth, in particular AR4395 (S04E58, beta) which is rapidly growing. There are currently five numbered regions on the solar disk, most of which are small. All other sunspot groups are either stable or in decay. A 15 degree long filament located at S60E05 erupted from 14/1115UT. A plasma spray was observed from AR4384 from just behind the northwest limb from 14/1029UT. Solar activity over 15-17 Mar is expected to be R0, chance R1. No Earth-directed CMEs were observed on UT day 14-Mar. Minor narrow angle CME activity was observed from behind the northwest limb. No CME appeared to be associated with the high solar latitude filament eruption. S0 solar radiation storm conditions were observed on UT day 14-Mar. S0 solar radiation storm conditions are expected over 15-17 Mar. A large, narrow coronal hole spans the visible solar disk. On UT day 14-Mar the solar wind speed was strong due to the coronal hole wind stream from this hole. The solar wind speed ranged from 565-755 km/s. The peak total interplanetary field strength (IMF, Bt) was 13 nT and the north-south IMF component range (Bz) was +9 to -9 nT. A southward interval of IMF conditions was observed 13/2130-14/0330UT. The solar wind is expected to continue to remain elevated on 15-Mar, with a slow declining trend. There is a slight chance for a weak glancing blow CME arrival on 15-Mar from a recent filament eruption observed on late 12-Mar to early 13-Mar.

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