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| During the last week, solar activity was high on 15 Oct, moderate on 13-14 Oct and 16 Oct and low for the rest of the time. Fourteen active sunspot regions (AR4241, AR4245-4256) were on the visible disk with 15 M-class flares produced. No solar proton event occurred. The F10.7 index increased from 121 sfu to 161 sfu. Due to the effects of the recurrent coronal hole high speed stream, the solar wind speed reached a peak value of 810 km/s during 11-13 Oct, and the geomagnetic field reached minor storm levels for 12 hours and active levels for 30 hours. The geomagnetic field reached active levels for 3 hours respectively on 10, 15 Oct. The geomagnetic field was at 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 13-16 Oct. | |
| Within the next week, solar activity is expected to be mainly moderate with a chance for M-class flares. The geomagnetic field is expected to reach storm levels on 17-18 Oct due to the effect of the CME from 13 Oct.The geomagnetic field is expected to reach storm levels on 19-20 Oct due to the effect of the recurrent coronal hole high speed stream. It will be quiet to unsettled for the rest of the time. | | Published: 2025-10-17 06:30 UTC Forecaster: 039 |
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| During the last week, solar activity was high on 17-18 Oct, moderate on 19-20 Oct and low for the rest of the time. Sixteen active sunspot regions (AR4246, AR4248, AR4250, AR4252, AR4254-4265) were on the visible disk with 14 M-class flares produced. The F10.7 index decreased from 164 sfu to 130 sfu. Due to the effects of the recurrent coronal hole high speed stream and CME on 13-15 Oct, the solar wind speed reached a peak value of 600 km/s during 18-19 Oct, the geomagnetic field reached moderate storm levels for 3 hours, minor storm levels for 9 hours , active levels for 12 hours and was at quiet to unsettled levels for the rest of the time. | |
| 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 activ or storm levels on 26-30 Oct due to the effect of the recurrent coronal hole high speed stream and will be quiet to unsettled for the rest of the time. | | Published: 2025-10-24 06:30 UTC Forecaster: 025/040 |
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| During the last week, solar activity was low. Eleven active sunspot regions (AR4252, AR4254, AR4257, AR4261-4262, AR4266-4271) were on the visible disk without M-class or above flares produced. The F10.7 index decreased from 134 sfu to 118 sfu. The geomagnetic field reached active levels for 3 hours on 25 Oct. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed reached a peak value of 650 km/s during 28-31 Oct, the geomagnetic field reached minor storm levels for 12 hours, active levels for 27 hours and was at quiet to unsettled levels 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. Due to the effects of two coronal hole high speed streams, the geomagnetic field is expected to reach active to minor storm levels on 31 Oct-3 Nov. The geomagnetic field is expected to reach active levels on 6 Nov due to the effect of another coronal hole high speed stream. It will be quiet to unsettled for the rest of the time. | | Published: 2025-10-31 06:30 UTC Forecaster: 016/042 |
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| During the last week, solar activity was low to high with high levels on 3-5 Nov, moderate levels on 2 and 6 Nov. Eight active sunspot regions (AR4261, AR4267, AR4269, AR4272-AR4276) were on the visible disk with 2 X-class flares and 11 M-class flares produced. No solar proton event occurred. The F10.7 index ranged between 115 sfu and 163 sfu. Due to the continuous effect of the recurrent coronal hole high speed stream, the solar wind speed reached a peak value of 800 km/s on 31 Oct, and the geomagnetic field reached minor storm levels for 3 hours and active levels for 12 hours. Due to the effect of another recurrent coronal hole high speed stream, the geomagnetic field reached active levels for 18 hours on 2-3 Nov. Due to the effects of the CME from 3 Nov and recurrent coronal hole high speed stream, the solar wind speed reached a peak value of 650 km/s, and the geomagnetic field reached major storm levels for 3 hours, moderate storm levels for 6 hours, minor storm levels for 9 hours and active levels for 9 hours. The geomagnetic field was at 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 31 Oct - 4 Nov. | |
| Within the next week, solar activity is expected to be mainly moderate with a chance for M-class and above flares. Due to the effects of the CMEs from 5 Nov and coronal hole high speed stream, the geomagnetic field is expected to reach moderate to major storm levels on 7-8 Nov, active levels on 9 Nov. It will be quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit will reach minor storm levels on 10-12 Nov. | | Published: 2025-11-07 06:30 UTC Forecaster: 039/026 |
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| During the last week, solar activity was low to high with high levels on 9-11 Nov, moderate levels on 7 Nov, low for the rest of time. Ten active sunspot regions (AR4272-AR4281) were on the visible disk with 3 X-class flares and 3 M-class flares produced. The greater than 10 MeV proton flux at geosynchronous orbit reached the level of a minor solar proton event at 11:25 on 10 Nov. It reached the moderate solar proton event level at 12:25 on 11 Nov and increased to the major solar proton event level at 01:45 on 12 Nov, with the maximum proton flux reaching 1460 pfu. This event ended at 16:50 on 13 Nov. The F10.7 index ranged between 163 sfu and 180 sfu. Due to the effects of the CME on 5 Nov and the recurrent coronal hole high speed stream, the solar wind speed reached a peak value of 850 km/s on 7-8 Nov, and the geomagnetic field reached moderate storm levels for 3 hours, minor storm levels for 15 hours and active levels for 9 hours. Due to the effect of the CMEs on 9-11 Nov, the solar wind speed reached a peak value of 960 km/s, and the geomagnetic field reached severe storm levels for 3 hours, major storm levels for 15 hours, moderate storm levels for 6 hours, minor storm levels for 12 hours and active levels for 6 hours. The geomagnetic field was at 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 11 Nov. | |
| Within the next week, solar activity is expected to be low to moderate with little chance for M-class flares. The geomagnetic field is expected to reach isolated active to storm levels on 16-17 Nov due to the effect of the recurrent coronal hole high speed stream and will be mainly quiet to unsettled. | | Published: 2025-11-14 06:30 UTC Forecaster: 025/040 |
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