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ARCHIVE

DAILY REPORTS

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During the past 24 hours, solar activity was low. Eight sunspot regions were on the visble disk without any M-class or above flares produced. The solar wind speed slowly decreased to about 520 km/s. The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm level.
Within the next three days, the solar activity will be low to moderate with chances for M-class flares. The geomagnetic field is expected to reach isolated active to minor storm levels on 26-27 Jul due to the CME from 23 Jul, and be mainly quiet to unsettled on 28 Jul. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor storm levels on 26 Jul.
	Published:	2025-07-26 00:00 UTC
	Forecaster:	039/026

During the past 24 hours, solar activity was low. 10 active sunspot regions were on the visble disk without any M-class or above flares produced. The solar wind speed ranged between 470 km/s and 540 km/s. The geomagnetic field reached active level for 3 hours and was quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit maintained at minor storm level.
Within the next three days, the solar activity will be low to moderate with chance for M-class flares. The geomagnetic field is expected to reach isolated active to minor storm levels on 27 Jul due to the CME from 23 Jul, and be mainly quiet to unsettled on 28-29 Jul.
	Published:	2025-07-27 00:07 UTC
	Forecaster:	026/029

During the past 24 hours, solar activity was low. Nine active sunspot regions were on the visble disk without any M-class or above flares produced. The solar wind speed decreased to about 410 km/s. The geomagnetic field was at quiet levels.
Within the next three days, the solar activity will be low to moderate with chance for M-class flares. The geomagnetic field is expected to be mainly quiet to unsettled.
	Published:	2025-07-28 00:09 UTC
	Forecaster:	029/027

During the past 24 hours, solar activity was low. Ten active sunspot regions were on the visble disk without any M-class or above flares produced. The solar wind speed maintained at about 400 km/s. The geomagnetic field was at quiet levels.
Within the next three days, the solar activity will be mainly low with a chance for M-class flares. The geomagnetic field is expected to be mainly quiet to unsettled.
	Published:	2025-07-29 00:04 UTC
	Forecaster:	027/010

During the past 24 hours, solar activity was low. Eight active sunspot regions were on the visble disk without M-class or above flares produced. The solar wind speed maintained at about 380 km/s. The geomagnetic field was at quiet to unsettled levels.
Within the next three days, the solar activity will be mainly low with a chance for M-class flares. The geomagnetic field is expected to be mainly quiet to unsettled.
	Published:	2025-07-29 23:45 UTC
	Forecaster:	010/042

During the past 24 hours, solar activity was low. Nine active sunspot regions were on the visble disk without M-class or above flares produced. The solar wind speed increased to about 440 km/s. The geomagnetic field was at quiet to unsettled levels.
Within the next three days, the solar activity will be mainly low with a chance for M-class flares. The geomagnetic field is expected to be mainly quiet to unsettled.
	Published:	2025-07-30 23:52 UTC
	Forecaster:	042/012

During the past 24 hours, solar activity was low. Nine active sunspot regions were on the visble disk without M-class or above flares produced. The solar wind speed maintained at about 430 km/s. The geomagnetic field was at quiet to unsettled levels.
Within the next three days, the solar activity will be mainly low with a little chance for M-class flares. The geomagnetic field is expected to be mainly quiet to unsettled.
	Published:	2025-07-31 23:51 UTC
	Forecaster:	026/041

WEEKLY REPORTS

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During the last week, solar activity reached high levels on 14-17 Jun and 19 Jun, moderate levels on 13 Jun and low levels on 18 Jun. Twelve sunspot regions (AR4105, AR4107, AR4109-AR4118) were on the visible disk with two X-class flares and twelve M-calss flares produced. The F10.7 index ranged from 136 sfu to 161 sfu. No solar proton event occurred. Due to the effects of a coronal hole high speed stream and the CME on 8 Jun, the geomagnetic field reached moderate storm levels for 15 hours and minor storm levels for 15 hours on 13-14 Jun. Due to the effect of another coronal hole high speed stream, the geomagnetic field reached active levels for 3 hours on 16 Jun. Due to the effects of coronal hole high speed stream and the CME on 15 Jun, the geomagnetic field reached active levels for 6 hours on 18-19 Jun. It was quiet to unsettled for the rest of time.
Within the next week, solar activity is expected to be low to moderate with chances for M-class and above flares. Due to the effect of the CME on 17 Jun, the geomagnetic field is expected to reach isolated active to storm levels on 20 Jun. Due to the effect of recurrent coronal hole high speed streams, the geomagnetic field is expected to reach isolated active to storm levels on 24-26 Jun, and to be quiet to unsettled for the rest of the time.
	Published:	2025-06-20 01:58 UTC
	Forecaster:	025/012

During the last week, solar activity reached moderate levels on 20 Jun and low levels for the rest of time. Ten sunspot regions (AR4111, AR4114-AR4122) were on the visible disk with two M-calss flares produced. The F10.7 index decreased from 130 sfu to 117 sfu. No solar proton event occurred. Due to the effects of a coronal hole high speed stream, the solar wind speed reached a peak of about 780 km/s and the geomagnetic field reached minor storm levels for 3 hours and active levels for 21 hours during 25-26 Jun. It was quiet to unsettled for the rest of time.
Within the next week, solar activity is expected to be low to moderate with chances for M-class flares. Due to the continuous effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated minor storm levels on 27 Jun. Due to the effect of another recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated active to minor storm levels during 1-2 Jul. It will be mainly quiet to unsettled for the rest of the time.
	Published:	2025-06-27 01:26 UTC
	Forecaster:	016/042

During the last week, solar activity was low. There were 16 active sunspot regions on the visible disk(AR4117, AR4118, AR4120-AR4133) with no M-class or above flares produced. The F10.7 rose from 118 sfu to around 130 sfu. No solar proton events occurred. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed rose to about 780 km/s on 27 Jun, and the geomagnetic field reached minor storm level for 3 hours and active levels for 6 hours. Due to the effects of the CME from 28 Jun and the recurrent coronal hole high speed stream, the geomagnetic field reached active levels for 6 hours on 3 Jul. From 28 Jun to 2 Jul, the flux of electrons greater than 2 MeV on geosynchronous orbit reached minor storm levels.
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 will reach active to minor storm levels on 4-6 Jul. Due to the effect of another recurrent coronal hole high speed stream, the geomagnetic field will reach active to minor storm levels on 8-10 Jul.
	Published:	2025-07-04 05:20 UTC
	Forecaster:	039/026

During the last week, solar activity reached moderate levels on 8-9 Jul and low levels for the rest of the time. 13 active sunspot regions (AR4122-AR4123, AR4125, AR4127-AR4132, AR4134-AR4137 ) were on the visible disk with two M-class flares produced. The F10.7 index ranged from 115 sfu to 129 sfu. No solar proton event occurred. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed reached to the maximum of 660 km/s on 4-8 Jul, and the geomagnetic field reached minor storm levels for 9 hours, active levels for 21 hours and 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 10 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 or minor storm levels on 11-14 Jul and will be mainly quiet to unsettled for the rest of the time.
	Published:	2025-07-11 01:27 UTC
	Forecaster:	025/041

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 01:30 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 06:06 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 00:49 UTC
	Forecaster:	041/026

SOLAR IMAGES

The active region magnetogram is created from the raw full-disk longitudinal magnetogram data, which is observed at Huairou Solar Observatory Station of Beijing in China.