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ARCHIVE

DAILY REPORTS

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During the past 24 hours, solar activity was low. Three active sunspot regions were on the visble disk without M-class and above flares produced. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed ranged between 500 km/s and 580 km/s, and the geomagnetic field reached active levels for 3 hours. It was quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm level.
Within the next three days, solar activity is expected to be mainly low to moderate with a chance for M-class flare. The geomagnetic field will reach isolated active levels on 14-15 Jan due to the effect of the recurrent coronal hole high speed stream. 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 14-15 Jan.
	Published:	2026-01-14 00:07 UTC
	Forecaster:	026/022

During the past 24 hours, solar activity was moderate. Four active sunspot regions were on the visble disk with an M1.6 flare produced. Due to the persistent effects of the recurrent coronal hole high speed stream, the solar wind speed maintained at about 560 km/s, and the geomagnetic field was quiet to unsettled. The greater than 2 MeV electron flux at geosynchronous orbit remained at minor storm levels.
Within the next three days, solar activity is expected to be low to moderate with chances for M-class flares. The geomagnetic field is expected to be quiet to unsettled with isolated time periods on 15 Jan due to the persistent effects of the recurrent coronal hole high speed stream, quiet on 16 Jan, and reach minor storm levels on 17 Jan due to the effects of another recurrent coronal hole high speed stream. The greater than 2 MeV electron flux at geosynchronous orbit will maintain at minor storm levels on 15-16 Jan.
	Published:	2026-01-14 23:55 UTC
	Forecaster:	022/039

During the past 24 hours, solar activity was low. Eight active sunspot regions were on the visble disk without M-class and above flare produced. The solar wind speed reach a peak of about 640 km/s, and the geomagnetic field was quiet to unsettled. The greater than 2 MeV electron flux at geosynchronous orbit remained at minor storm levels.
Within the next three days, solar activity is expected to be low to moderate with chances for M-class flares. The geomagnetic field is expected to be quiet to unsettled on 16 Jan and reach minor storm levels on 17-18 Jan due to the effects of a recurrent coronal hole high speed stream. The greater than 2 MeV electron flux at geosynchronous orbit will maintain at minor storm levels on 16 Jan.
	Published:	2026-01-16 00:03 UTC
	Forecaster:	039/026

During the past 24 hours, solar activity was low. 9 active sunspot regions were on the visble disk without M-class and above flare produced. Due to the effect of CME, the solar wind speed reach a peak of about 720 km/s, and the geomagnetic field reached minor storm levels for 6 hours, active levels for 9 hours, quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit remained at minor storm level.
Within the next three days, solar activity is expected to be low to moderate with chances for M-class flares. The geomagnetic field is expected to reach active to storm levels due to the effect of a recurrent coronal hole high speed stream.
	Published:	2026-01-16 23:47 UTC
	Forecaster:	026/027

During the past 24 hours, solar activity was moderate. Seven active sunspot regions were on the visble disk with two M-class flares produced. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed maintained at about 700 km/s, and the geomagnetic field reached minor storm levels for 3 hours, active levels for 15 hours, quiet to unsettled levels for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit maintained at minor storm levels.
Within the next three days, solar activity is expected to be mainly 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 minor storm levels for short periods on 18 Jan and active levels on 19-20 Jan. The greater than 2 MeV electron flux at geosynchronous orbit will maintain at minor storm levels.
	Published:	2026-01-17 23:46 UTC
	Forecaster:	027/016

During the past 24 hours, solar activity was high. Eight active sunspot regions were on the visble disk with an X1.9 flare produced. The greater than 10 MeV proton flux at geosynchronous orbit reached the threshold of minor solar proton event levels at 22:55 UTC, and the peak value of flux was 36 pfu. The solar wind speed decreased to about 470 km/s. The geomagnetic field reached active levels for 6 hours and quiet to unsettled levels for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit maintained at minor storm levels.
Within the next three days, solar activity is expected to be mainly moderate with chances for M-class and above flares. The greater than 10 MeV proton flux at geosynchronous orbit will maintain at minor solar proton event levels on 19 Jan. Due to the effects of CME on 18 Jan and the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach major storm levels on 19-20 Jan and minor storm levels on 21 Jan. The greater than 2 MeV electron flux at geosynchronous orbit will maintain at minor storm levels on 19 Jan.
	Published:	2026-01-19 00:29 UTC
	Forecaster:	016/042

During the past 24 hours, solar activity was moderate. Ten active sunspot regions were on the visble disk with one M-class flare produced. The greater than 10 MeV proton flux at geosynchronous orbit reached the threshold of moderate solar proton event level at 04:40 UTC, reached the threshold of major solar proton event level at 10:40 UTC, and the peak value was 36976 pfu. Due to the effects of the CME on 18 Jan and the recurrent coronal hole high speed stream, the solar wind speed reached a peak of about 1100 km/s. The geomagnetic field reached severe level for 3 hours, reached major level for 3 hours, and quiet to unsettled levels for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit maintained at minor storm levels.
Within the next three days, solar activity is expected to be mainly moderate with chances for M-class and above flares. The greater than 10 MeV proton flux at geosynchronous orbit will maintain at solar proton event levels on 20-21 Jan. Due to the continuous effects of CME on 18 Jan and the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach major storm levels on 20 Jan, minor storm levels on 21 Jan and active levels on 22 Jan.
	Published:	2026-01-19 23:19 UTC
	Forecaster:	042/012

WEEKLY REPORTS

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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

During the last week, solar activity was moderate on 12 Dec and low for the rest of the time. Twelve sunspot active regions (AR4294, AR4296, AR4299, AR4304-AR4305, AR4307-AR4313) were on the visible disk with two M-class flares produced. The F10.7 index decreased from 135 sfu to 116 sfu. No solar proton event occurred. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed reached the peak of about 700 km/s and the geomagnetic field was at active levels for 9 hours on 12-13 Dec. Due to the effect of another recurrent coronal hole high speed stream, the solar wind speed reached a peak of about 670 km/s and the geomagnetic field was at minor storm levels for 3 hours and active levels for 9 hours on 17-18 Dec. It was at quiet to unsettled levels for the rest of the time.
Within the next week, solar activity is expected to be mainly low. The geomagnetic field will reach isolated active levels to minor storm levels on 23-25 Dec due to the effect of a recurrent coronal hole high speed stream. It will be quiet to unsettled for the rest of time.
	Published:	2025-12-19 02:29 UTC
	Forecaster:	012/010

During the last week, solar activity was moderate on 19-21 Dec and low for the rest of the time. Twelve sunspot active regions (AR4311-AR4322) were on the visible disk with three M-class flares produced. The F10.7 index increased from 118 sfu to 163 sfu. No solar proton event occurred. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed reached the peak of about 750 km/s and the geomagnetic field was at minor storm levels for 9 hours and active levels for 54 hours on 21-24 Dec. 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 19-20 Dec and 23-25 Dec.
Within the next week, solar activity is expected to be low to moderate with chances for M-class flares. The geomagnetic field is expected to be mainly at quiet to unsettled levels. The greater than 2 MeV electron flux at geosynchronous orbit will remain at minor storm levels on 26-28 Dec.
	Published:	2025-12-26 02:18 UTC
	Forecaster:	022/015

During the last week, solar activity was high on 27, 31 Dec, moderate on 28-29 Dec and low for the rest of the time. Seventeen sunspot active regions (AR4312, AR4316-AR4317, AR4319-AR4332) were on the visible disk with six M-class flares produced. The F10.7 index fluctuated between 166 sfu and 195 sfu. No solar proton event occurred. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed reached the peak of about 540 km/s on 31 Dec. The geomagnetic field was at quiet to unsettled levels. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 26-30 Dec.
Within the next week, solar activity is expected to be low to moderate with chances for M-class flares. The geomagnetic field is expected to reach isolated active to storm levels due to effects of a recurrent coronal hole high speed stream and CMEs from 31 Dec and 1 Jan, and be mainly quiet to unsettled for the rest of the time.
	Published:	2026-01-02 02:26 UTC
	Forecaster:	039/041

During the last week, solar activity was low. Eleven sunspot active regions (AR4323-AR4325, AR4328, AR4332-AR4338) were on the visible disk without M-class flares produced. The F10.7 index decreased from 166 sfu to 135 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 of about 600 km/s and the geomagnetic field was at minor storm levels for six hours and at active levels for three hours on 2 Jan. Due to the effect of a CME on 1 Jan, the solar wind speed reached a peak of about 500 km/s and the geomagnetic field was at active levels for six hours on 5 Jan. The solar wind speed increased to about 420 km/s and the geomagnetic field was at active levels for six hours on 8 Jan. The geomagnetic field was at quiet to unsettled levels for the rest of time.
Within the next week, solar activity is expected to be low to moderate with chances for M-class flares. The geomagnetic field is expected to reach isolated active to storm levels on 9-10 and 13-14 Jan due to the effect of the recurrent coronal hole high speed stream. It will be mainly quiet to unsettled for the rest of the time.
	Published:	2026-01-09 02:41 UTC
	Forecaster:	010/042

During the last week, solar activity was moderate on 11 and 14 Jan, low for the rest of the time. 12 sunspot active regions (AR4333-AR4334, AR4336-AR4337, AR4339-AR4346) were on the visible disk with 2 M-class flares produced. The F10.7 index ranged between 111 sfu and 139 sfu. No solar proton event occurred. Due to the effects of a CME from 8 Jan and recurrent coronal hole high speed stream, the solar wind speed reached a peak of about 620 km/s and the geomagnetic field was at moderate storm levels for 6 hours, minor storm active levels for 12 hours and active levels for 24 hours on 9-13 Jan. The geomagnetic field was at quiet to unsettled levels for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 13-15 Jan.
Within the next week, solar activity is expected to be low to moderate with chances for M-class flares. The geomagnetic field is expected to reach isolated active to storm levels on 17-20 Jan due to the effect of the recurrent coronal hole high speed stream. It will be mainly quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit will remain at minor storm level on 16, 20-22 Jan.
	Published:	2026-01-16 00:52 UTC
	Forecaster:	039/026

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.