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ARCHIVE

DAILY REPORTS

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During the past 24 hours, solar activity was high. Eight active sunspot regions were on the visble disk with one X4 flare and two M-Class flares produced. Due to the effect of the X4 flare, the greater than 10 MeV proton flux at geosynchronous orbit reached the threshold of minor proton event at 09:20, with the peak of flux 17 pfu. It ended at 13:25. The solar wind speed maintained at about 550 km/s, the geomagnetic field was quiet.
Within the next three days, 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 mionr storm levels on 16-17 Nov due to the effects of the recurrent coronal hole high speed stream and the CME from 14 Nov. It will be quiet to unsettled for the rest of the time.
	Published:	2025-11-15 00:06 UTC
	Forecaster:	040/026

During the past 24 hours, solar activity was low. Eight active sunspot regions were on the visble disk without any M-Class or above flares produced. The solar wind speed maintained at about 550 km/s, the geomagnetic field was at unsettled levels for 6 hours, and was quiet for the rest of the time.
Within the next three days, solar activity is expected to be low. The geomagnetic field is expected to reach isolated active to mionr storm levels on 16-17 Nov due to the effects of a recurrent coronal hole high speed stream and the CME from 14 Nov. It will be quiet to unsettled for the rest of the time.
	Published:	2025-11-15 23:46 UTC
	Forecaster:	022/015

During the past 24 hours, solar activity was moderate. Five active sunspot regions were on the visble disk with 1 M-Class flare produced. The solar wind speed decreased to about 550 km/s, the geomagnetic field was at active levels for 9 hours, and was unsettled for the rest of the time.
Within the next three days, solar activity is expected to be low. The geomagnetic field is expected to reach isolated active to mionr storm levels on 17 Nov due to the effects of a recurrent coronal hole high speed stream. It will be quiet to unsettled for the rest of the time.
	Published:	2025-11-16 23:49 UTC
	Forecaster:	015/042

During the past 24 hours, solar activity was low. Three active sunspot regions were on the visble disk with no M-Class or above flare produced. The solar wind speed decreased to about 480 km/s, the geomagnetic field was at active level for 3 hours. It was quiet to unsettled for the rest of the time.
Within the next three days, solar activity is expected to be low. The geomagnetic field will be quiet to unsettled.
	Published:	2025-11-17 23:46 UTC
	Forecaster:	042/027

During the past 24 hours, solar activity was low. Four active sunspot regions were on the visble disk without any M-Class or above flare produced. The solar wind speed decreased to about 410 km/s, the geomagnetic field was at quiet to unsettled levels.
Within the next three days, solar activity is expected to be mainly low. The geomagnetic field will be quiet to unsettled.
	Published:	2025-11-19 00:06 UTC
	Forecaster:	027/010

During the past 24 hours, solar activity was low. Three active sunspot regions were on the visble disk without M-Class or above flares produced. The solar wind speed decreased to about 370 km/s. The geomagnetic field was at quiet levels.
Within the next three days, solar activity is expected to be mainly low. The geomagnetic field will be quiet to unsettled.
	Published:	2025-11-19 23:42 UTC
	Forecaster:	010/042

During the past 24 hours, solar activity was low. Four active sunspot regions were on the visble disk without any M-Class or above flares produced. The solar wind speed increased to about 430 km/s, the geomagnetic field was quiet to unsettled.
Within the next three days, solar activity is expected to be mainly low. The geomagnetic field is expected to reach isolated active levels on 21 Nov due to the effects of a coronal hole high speed stream. It will be quiet to unsettled for the rest of the time.
	Published:	2025-11-20 23:04 UTC
	Forecaster:	042/012

WEEKLY REPORTS

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During the last week, solar activity was moderate on 3 Oct and 9 Oct, and low for the rest of the time. Fifteen active sunspot regions (AR4230, AR4232-4233, AR4235-4236, AR4238, AR4241-4249) were on the visible disk with 3 M-class flares produced. No solar proton event occurred. The F10.7 index decreased from 170 sfu to 120 sfu. Due to the effects of the recurrent coronal hole high speed stream, the solar wind speed reached a peak value of 800 km/s during 3-4 Oct, and the geomagnetic field reached minor storm levels for 6 hours and active levels for 27 hours. Due to the effect of the CME on 3 Oct, the solar wind speed reached a peak value of 450 km/s during 7-8 Oct, and the geomagnetic field reached 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 3-5 Oct, 7-9 Oct and reached moderate storm levels on 6 Oct.
Within the next week, solar activity is expected to be mainly low with a chance for M-class flares. The geomagnetic field is expected to reach storm levels on 11-13 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. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor storm levels on 14-16 Oct.
	Published:	2025-10-10 02:57 UTC
	Forecaster:	016/027

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 02:42 UTC
	Forecaster:	039

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 02:49 UTC
	Forecaster:	025/040

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 02:08 UTC
	Forecaster:	016/042

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 03:59 UTC
	Forecaster:	039/026

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 02:33 UTC
	Forecaster:	025/040

During the last week, solar activity was high on 14 Nov, moderate on 16 Nov and low for the rest of time. Fourteen sunspot active regions (AR4274-AR4277, AR4279-AR4288) were on the visible disk with one X4.0-class flare and three M-class flares produced. The greater than 10 MeV proton flux at geosynchronous orbit reached the level of a minor solar proton event at 09:20 and ended at 13:25 with the maximum proton flux reaching 17 pfu on 14 Nov. Due to the effects of the CME on 14 Nov and the recurrent coronal hole high speed stream, the solar wind speed reached a peak value of 550 km/s on 16-17 Nov, and the geomagnetic field reached active levels for 12 hours. The geomagnetic field 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 little chance for M-class flares. The geomagnetic field is expected to be mainly at quiet to unsettled levels with isolated active levels on 21 Nov and active to storm levels on 25-27 Nov due to the effect of the recurrent coronal hole high speed stream.
	Published:	2025-11-21 01:36 UTC
	Forecaster:	042/012

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.