| |
 |
| During the last week, solar activity reached moderate level on 12 Jul and low levels for the rest of the time. Fourteen active sunspot regions ( AR4135-AR4148 ) were on the visible disk with 3 M-class flares produced. The F10.7 index ranged from 128 sfu to 156 sfu. No solar proton event occurred. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed reached the maximum of 520 km/s and the geomagnetic field reached active levels for 9 hours on 11 Jul. Due to the effect of another recurrent coronal hole high speed stream, the solar wind speed reached the maximum of 700 km/s and the geomagnetic field reached minor storm levels for 15 hours, active levels for 39 hours on 13-17 Jul. It was quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 16-17 Jul. | |
| Within the next week, solar activity is expected to be low to moderate. Due to the effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated active levels on 18-19 Jul. Due to the effect of another recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated active or minor storm levels on 22-24 Jul. It will be mainly quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit will maintain at minor storm levels on 18-20 Jul. | | Published: 2025-07-18 06:30 UTC Forecaster: 026/016 |
|
| During the last week, solar activity was low. Twenty-two sunspot regions (AR4135-AR4136, AR4138-AR4140, AR4142-AR4158) were on the visible disk without M-class and above flares produced. The F10.7 index ranged between 143 sfu to 156 sfu. No solar proton event occurred. Due to the continuous effect of the recurrent coronal hole high speed stream, the solar wind speed reached the maximum of 680 km/s and the geomagnetic field reached active levels for 3 hours on 18-19 Jul. Due to the effect of another recurrent coronal hole high speed stream, the solar wind speed peaked about 700 km/s and the geomagnetic field reached minor storm levels for 9 hours, active levels for 24 hours on 22-23 Jul. It was quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 18-22 Jul. | |
| Within the next week, solar activity is expected to be low to moderate. Due to the effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated active levels on 30-31 Jul and will be mainly quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit will maintain at minor storm levels on 25-29 Jul. | | Published: 2025-07-25 06:30 UTC Forecaster: 039 |
|
| During the last week, solar activity was low. Seventeen sunspot regions (AR4149-AR4150, AR4153-AR4167) were on the visible disk without M-class and above flares produced. The F10.7 index ranged between 143 sfu to 152 sfu. No solar proton event occurred. Due to the effect of the CME on 23 Jul, the geomagnetic field reached active levels for 3 hours on 26 Jul. It was quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 25-26 Jul. | |
| Within the next week, solar activity is expected to be mainly low. Due to the effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated active levels on 4-5 Aug and will be mainly quiet to unsettled for the rest of the time. | | Published: 2025-08-01 06:30 UTC Forecaster: 041/026 |
|
| During the last week, solar activity reached moderate levels on 3-7 Aug and low levels for the rest of the time. Fifteen active sunspot regions ( AR4153-AR4155, AR4157, AR4161, AR4165-AR4174 ) were on the visible disk with 8 M-class flares produced. The F10.7 index ranged from 142 sfu to 158 sfu. No solar proton event occurred. The solar wind speed reached the maximum of 570 km/s and the geomagnetic field reached active levels for 3 hours on 3 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. Due to the effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated active levels on 18-19 Jul. Due to the effect of another recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated active or minor storm levels on 8-12 Aug. It will be mainly quiet to unsettled for the rest of the time. | | Published: 2025-08-08 06:30 UTC Forecaster: 016 |
|
| During the last week, solar activity was at moderate levels on 8-12 Aug and low levels on 13-14 Aug. Twenty-two active sunspot regions ( AR4161, AR4165-AR4185 ) were on the visible disk with 12 M-class flares produced. The F10.7 index ranged from 130 sfu to 153 sfu. No solar proton event occurred. Due to the effects of the recurrent coronal hole high speed stream and CME on 5 Aug, the solar wind speed reached the peak of 700 km/s and the geomagnetic field reached moderate levels for 3 hours and minor storm levels for 21 hours on 8-9 Aug. It reached active levels for a total of 36 hours on 8-14 Aug. The greater than 2 MeV electron flux at geosynchronous orbit maintained at minor storm levels on 11-14 Aug. | |
| Within the next week, solar activity is expected to be low to moderate with chances for M-class flares. Due to the effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated active levels on 18-19 Jul. Due to the effect of another recurrent coronal hole high speed stream, the geomagnetic field is expected to reach minor storm levels on 18-20 Aug. It will be mainly quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit will maintained at minor storm levels on 15 Aug. | | Published: 2025-08-15 06:30 UTC Forecaster: 010 |
|
|
