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ARCHIVE

DAILY REPORTS

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During the past 24 hours, solar activity was low. Eight sunspot active regions were on the visble disk without any M-class or above flares produced. The solar wind speed slowly decreased to about 650 km/s. The geomagnetic field was quiet to unsettled.
Within the next three days, solar activity is expected to be mainly moderate with chances for M-class flares. The geomagnetic field is expected to reach active levels on 7-8 Dec due to the CME produced on 4 Dec.
	Published:	2025-12-05 23:16 UTC
	Forecaster:	022/039

During the past 24 hours, solar activity was high. Seven sunspot active regions were on the visble disk with 2 M-class flares produced. The solar wind speed slowly decreased to about 630 km/s. The geomagnetic field was active for 6 hours and quiet to unsettled for the rest of time.
Within the next three days, solar activity is expected to be mainly moderate with chances for M-class flares. The geomagnetic field is expected to be mainly quiet to unsettled. The greater than 2 MeV electron flux at geosynchronous orbit will reach minor storm levels on 7-9 Dec
	Published:	2025-12-06 23:43 UTC
	Forecaster:	040/026

During the past 24 hours, solar activity was low. Seven active sunspot regions were on the visble disk without M-class and above flares produced. The solar wind speed slowly decreased from 620 km/s to about 420 km/s. The geomagnetic field was active for 3 hours and quiet to unsettled for the rest of the time.
Within the next three days, solar activity is expected to be mainly moderate with chances for M-class flares. The geomagnetic field is expected to reach storm levels on 9-10 Dec and mainly quiet to unsettled for the rest of the time.
	Published:	2025-12-07 23:10 UTC
	Forecaster:	026/027

During the past 24 hours, solar activity was high. Eight active sunspot regions were on the visble disk with one X1.1 flare and six M-class flares produced. The solar wind speed slowly decreased to about 360 km/s. The geomagnetic field was at quiet levels.
Within the next three days, solar activity is expected to be mainly moderate with chances for M-class and above flares. The geomagnetic field is expected to reach storm levels on 9-10 Dec and mainly quiet to unsettled for the rest of the time.
	Published:	2025-12-08 23:18 UTC
	Forecaster:	027/026

During the past 24 hours, solar activity was high. Eight active sunspot regions were on the visble disk with 5 M-class flares produced. The solar wind speed slowly decreased to about 330 km/s. The geomagnetic field was at quiet levels.
Within the next three days, solar activity is expected to be mainly moderate with chances for M-class and above flares. The geomagnetic field is expected to be mainly quiet to unsettled.
	Published:	2025-12-09 23:54 UTC
	Forecaster:	026/042

During the past 24 hours, solar activity was high. Seven active sunspot regions were on the visble disk with 5 M-class flares produced. Due to the effect the CME, the solar wind speed increased to about 470 km/s, and the geomagnetic field reached moderate stom levels for 3 hours. It was quiet to unsettled for the rest of time.
Within the next three days, solar activity is expected to be mainly moderate with chances for M-class and above flares. The geomagnetic field will reach storm levels on 11 Dec due to the continuous effect of the CME. It is expected to be mainly quiet to unsettled on 12 Dec. It will reached active to minor storm levels on 13 Dec due to the effect of the recurrent coronal hole high speed stream.
	Published:	2025-12-10 23:55 UTC
	Forecaster:	042/027

During the past 24 hours, solar activity was low. Seven active sunspot regions were on the visble disk without M-class and above flares produced. Due to the continuous effect of the CME, the solar wind speed maintained at about 410 km/s. The geomagnetic field reached moderate storm levels for 3 hours, minor storm levels for 6 hours and active levels for 3 hours.
Within the next three days, solar activity is expected to be moderate to low with chances for M-class flares. The geomagnetic field will reach active levels for short periods on 12 Dec due to the continuous effect of the CME. It will reached active to minor storm levels on 13-14 Dec due to the effect of the recurrent coronal hole high speed stream.
	Published:	2025-12-12 00:05 UTC
	Forecaster:	027/041

WEEKLY REPORTS

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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 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

During the last week, solar activity was low. Nine sunspot active regions (AR4284-AR4285, AR4287-AR4293) were on the visible disk with no M-class flares and above produced. The F10.7 index ranged between 116 sfu and 121sfu. No solar proton event occurred. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed reached a peak value of 800 km/s on 25 Nov, the geomagnetic field reached minor storm levels for 12 hours and active levels for 63 hours on 23-27 Nov. It 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 25-27 Nov.
Within the next week, solar activity is expected to be mainly low. The geomagnetic field is expected to reach active levels on 28-29 Nov due to the continuous effect of the recurrent coronal hole high speed stream. It will reach active or minor storm levels on 3-4 Dec due to the effect of another coronal hole high speed stream. It will be quiet to unsettled for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit will remain at minor storm levels on 28 Nov-1 Dec.
	Published:	2025-11-28 02:49 UTC
	Forecaster:	027/026

During the last week, solar activity was high on 28-29 Nov, 1 Dec and 4 Dec, and low for the rest of the time. 13 sunspot active regions (AR4287-AR4288, AR4290-AR4292, AR4294-AR4301) were on the visible disk with an X-class and 8 M-class flares produced. The F10.7 index increased from 138 sfu to 220sfu. No solar proton event occurred. Due to the effects of a recurrent coronal hole high speed stream, the solar wind speed reached a peak value of about 660 km/s on 28 Nov, and the geomagnetic field was at active levels for 33 hours on 28 Nov-1 Dec. Due to the effects of another recurrent coronal hole high speed stream as well as a CME produced on 1 Dec, the solar wind speed reached a peak value of about 730 km/s on 4 Dec, and the geomagnetic field was at major storm levels for 3 hours, minor storm levles for 15 hours, active levels for 12 hours on 3-4 Dec. 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 was at minor storm levels from 28 Nov to 3 Dec.
Within the next week, solar activity is expected to be moderate to high, with chances for M and above class flares. The geomagnetic field is expected to reach active to minor storm levels on 5 Dec due to the continuous effect of the recurrent coronal hole high speed stream and the CME produced on 1 Dec. The geomagnetic field will be quiet to unsettled for the rest of time.
	Published:	2025-12-05 03:03 UTC
	Forecaster:	039/022

During the last week, solar activity was high on 6, 8-10 Dec, moderate on 7 Dec, and low for the rest of the time. Thirteen sunspot active regions (AR4294-AR4296, AR4298-AR4307) were on the visible disk with an X1.1 flare and eighteen M-class flares produced. The F10.7 index decreased from 206 sfu to 146 sfu. No solar proton event occurred. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed reached a peak value of about 700 km/s and the geomagnetic field was at active levels for 9 hours on 5-7 Dec. Due to the effect of CME, the solar wind speed reached a peak value of about 470 km/s and the geomagnetic field was at moderate storm levels for 6 hours, minor storm levles for 6 hours, and active levels for 3 hours on 10-11 Dec. 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 chances for M-class and above flares. The geomagnetic field will reach isolated active levels on 12 Dec due to the continuous effect of the CME, and reach active to minor storm levels on 13-15 Dec due to the effect of the recurrent coronal hole high speed stream. It will be quiet to unsettled for the rest of time.
	Published:	2025-12-12 02:33 UTC
	Forecaster:	027/041

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.