Summary and Forecast
Solar Summary
(last updated 03 Jul 2025 23:30 UT)
Activity 03 Jul: R0 Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 03 Jul: 125/78
Solar Forecast
(last updated 03 Jul 2025 23:30 UT)
04 Jul 05 Jul 06 Jul Activity R0 R0 R0 Fadeouts None expected None expected None expected 10.7cm/SSN 130/84 132/86 135/89 COMMENT: Solar activity on UT day 3-Jul was R0, with no significant solar flares. There is currently no solar region of significance on the visible solar disk. Solar region AR4129 (N02E02, beta) has grown slightly and solar region AR4127 (S17W16, beta) exhibited redistribution of its intermediate spots with both growth and decay evident. There are currently eight numbered sunspot regions on the solar disk. Most of the solar regions are very small. A very small 5 degree long solar filament located at S02E12 lifted off from 03/1218UT but no CME was discernible. Solar activity is expected to be R0 over 4-6 Jul. Solar prominence eruptions were observed on the eastern solar limb from 03/0508UT and western solar limb from 03/0349UT in SDO304 imagery. No Earth directed CMEs were observed in available imagery. From 03/0720UT CMEs were observed directed east and west in association with the solar prominence eruptions. Due to the solar limb location of the eruptions theses CMEs are not expected to reach te Earth. S0 solar radiation storm conditions were observed on UT day 3-Jul. S0 solar radiation storm conditions are expected over 4-6 Jul. The solar wind speed on UT day 3-Jul was slightly variable. The solar wind speed ranged from 408 to 340 km/s and is currently at 370 km/s. The peak total interplanetary field strength (IMF, Bt) was 14 nT and the north-south IMF component range (Bz) was +3 to -12 nT. The IMF Bt became mildly enhanced after 03/05500UT. The IMF Bz was mildly southward 02/2200UT-03/0340UT, 03/1152-1230UT and from 03/1725UT. The Earth is expected to enter a coronal hole wind stream over 04-05 Jul, however the southern latitudinal location of the associated coronal hole may reduce the influence of this wind stream.
Solar Activity levels are explained in the SWS Solar Terrestrial Glossary.
