Summary and Forecast

Solar Summary

(last updated 03 Jun 2023 23:30 UT)

Activity 03 Jun: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 03 Jun: 165/119

Solar Forecast

(last updated 03 Jun 2023 23:30 UT)

04 Jun 05 Jun 06 Jun Activity R0-R1 R0-R1 R0-R1 Fadeouts Possible Possible Possible 10.7cm/SSN 165/119 160/114 160/114 COMMENT: Solar activity on UT day 03-Jun was at R0, with no significant solar flares. There are currently 7 numbered sunspots on the solar disk. AR3323 (S08E33, beta-gamma) has shown some development in its intermediate and trailer spots, although minor. All other sunspots are either stable or in decay. Solar activity is expected to be R0-R1 over 04-06 Jun. No significant CMEs were observed on UT day 03-Jun. A large solar filament is centered near S30W30, which is considered geoeffective. While the filament appears stable it will be monitored closely for any eruption. The solar wind speed on UT day 03-Jun was on a general declining trend and ranged between 438 to 297 km/s. The peak total interplanetary field strength (IMF, Bt) was 8 nT and the north-south IMF component range was +7 to -4 nT. Two coronal holes which featured in yesterday's forecast have failed to connect with Earth, and an increase in solar wind speed from these sources is therefore unlikely now. The solar wind speed is expected to remain at background levels over 04-06 Jun, although mild increases are possible on 04-Jun if there are any coronal hole influences.

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