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| During the last week, solar activity was low. Ten sunspot active regions (AR4492, AR4494-AR4496, AR4498-AR4503) were on the visible disk without M-class or above flare produced. SEP ended on 31 Jul and the maximum proton flux reached 18.1 pfu. The F10.7 index decreased from 148 sfu to 101 sfu. Due to the effect of CME on 30 Jul, the geomagnetic field reached moderate storm levels for 3 hours and active levels for 18 hours on 2-4 Aug. It was quiet to unsettled for the rest of the time. | |
| Within the next week, solar activity is expected to be low to moderate with chances for M-class flares. The geomagnetic field is expected to be mainly quiet to unsettled with isolated active levels on 8 Aug and 11 Aug due to the effect of a recurrent coronal hole high speed stream. | | Published: 2026-08-07 06:30 UTC Forecaster: 012/016 |
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| During the last week, solar activity was very low on 7-8, 13 Aug and low for the rest of time. Twelve sunspot active regions (AR4498, AR4510, AR4502-AR4511) were on the visible disk without M-class or above flare produced. No SEP event occurred. The F10.7 index fluctuate between 94 sfu and 108 sfu. Due to the effect of recurrent coronal hole high speed stream, the solar wind speed reached a peak of about 480 km/s and the geomagnetic field reached moderate storm levels for 3 hours, minor storm levels for 3 hours and active levels for 9 hours on 8-9 Aug. It was quiet to unsettled for the rest of the time. | |
| Within the next week, solar activity is expected to be mainly low with slight chances for M-class flares. The geomagnetic field is expected to be mainly quiet to unsettled with isolated active levels on 14-15 Aug due to the effect of a coronal hole high speed stream. | | Published: 2026-08-14 06:30 UTC Forecaster: 039/015 |
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| During the last week, solar activity was high on 20 Aug, moderate on 19 Aug and low for the rest of time. Ten sunspot active regions (AR4503, AR4506-AR4514) were on the visible disk with 4 M-class flares produced. No SPE event occurred. The F10.7 index fluctuated between 114 sfu and 129 sfu. Due to the effect of recurrent coronal hole high speed streams, the solar wind speed reached a peak of about 630 km/s and the geomagnetic field reached minor storm levels for 9 hours, active levels for 18 hours on 17-19 Aug. It was quiet to unsettled for the rest of the time. | |
| Within the next week, solar activity is expected to be mainly moderate with a chance for M-class and above flares. The geomagnetic field is expected to be mainly at quiet to unsettled levels. The greater than 2 MeV electron flux at geosynchronous orbit will reach minor storm levels on 21-23 Aug. | | Published: 2026-08-21 06:30 UTC Forecaster: 012/040 |
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| During the last week, solar activity was high on 25 Aug, moderate on 21, 24 and 26 Aug and low for the rest of time. Eight sunspot active regions (AR4508, AR4513-AR4519) were on the visible disk with 8 M-class flares produced. No SPE event occurred. The F10.7 index fluctuated between 122 sfu and 143 sfu. The solar wind speed decreased from 550km/s to 250km/s. The geomagnetic field was at quiet to unsettled levels. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 22 Aug. | |
| Within the next week, solar activity is expected to be low to moderate with a chance for M-class flares. The geomagnetic field is expected to reach active levels to minor storm levels on 28 Aug due to the effects of a coronal hole high speed stream and the CME from 25 Aug. It is expected to be mainly at quiet to unsettled levels for the rest of the time. | | Published: 2026-08-28 06:30 UTC Forecaster: 016/042 |
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| During the last week, solar activity was moderate on 2 Sep and low for the rest of the time. Ten active sunspot regions (AR4513, AR4515, AR4517-AR4524) were on the visible disk with 1 M-class flare produced. No solar proton event occurred. The F10.7 index fluctuated between 101 sfu and 116 sfu. Due to the effects of a coronal hole high speed stream and the CME from 25 Aug, the solar wind speed increased to a peak of 470 km/s and the geomagnetic field reached active levels for 27 hours on 28-30 Aug, quiet to unsettled levels for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 1-2 Sep. | |
| Within the next week, solar activity is expected to be low to moderate with chances for M-class flares. The geomagnetic field is expected to be mainly at quiet to unsettled levels. | | Published: 2026-09-04 06:30 UTC Forecaster: 022/026 |
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