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ARCHIVE

DAILY REPORTS

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During the past 24 hours, solar activity was low. Seven active sunspot regions were on the visible disk without any M-class or above flares produced. The solar wind speed slowly decreased to about 380 km/s. The geomagnetic field was at quiet to unsettled levels.
Within the next three days, solar activity is expected to be mainly low with a slight chance for M-class flare. The geomagnetic field is expected to reach active to minor storm levels on 14-15 Sep due to the recurrent coronal hole high speed stream, and mainly quiet to unsettled levels on 13 Sep.
	Published:	2026-09-13 00:03 UTC
	Forecaster:	027/012

During the past 24 hours, solar activity was low. Six active sunspot regions were on the visible disk without any M-class or above flares produced. The solar wind speed maintained at 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 with a slight chance for M-class flare. The geomagnetic field is expected to reach active to minor storm levels on 14-15 Sep due to the recurrent coronal hole high speed stream, and mainly quiet to unsettled levels on 16 Sep.
	Published:	2026-09-13 23:51 UTC
	Forecaster:	026/016

During the past 24 hours, solar activity was low. Four active sunspot regions were on the visible disk without any C-class or above flares produced. The solar wind speed increased to about 400 km/s. The geomagnetic field reached active levels for 3 hours and it was quiet to unsettled for the rest of the time.
Within the next three days, solar activity is expected to be mainly low with a slight chance for M-class flares. The geomagnetic field is expected to reach active to minor storm levels on 15-16 Sep due to the recurrent coronal hole high speed stream, and mainly quiet to unsettled levels on 17 Sep.
	Published:	2026-09-14 23:46 UTC
	Forecaster:	016/042

During the past 24 hours, solar activity was very low. Two active sunspot regions were on the visible disk without any C-class or above flares produced. The solar wind speed increased a peak of about 810 km/s. The geomagnetic field was quiet to unsettled.
Within the next three days, solar activity is expected to be mainly low with a slight chance for M-class flares. The geomagnetic field is expected to reach active to minor storm levels on 16-17 Sep due to the recurrent coronal hole high speed stream and the CME on 14 Sep, and mainly quiet to unsettled levels for the rest of time.
	Published:	2026-09-15 23:44 UTC
	Forecaster:	042/012

During the past 24 hours, solar activity was very low. Two active sunspot regions were on the visible disk without any C-class or above flares produced. The solar wind speed maintained at about 500 km/s. The geomagnetic field reached active levels for 3 hours and at quiet to unsettled levels for the rest time.
Within the next three days, solar activity is expected to be mainly low with a slight chance for M-class flares. The geomagnetic field is expected to be mainly at quiet to unsettled levels and reach active to minor storm levels on 17 Sep due to the recurrent coronal hole high speed stream and the CME on 14 Sep.
	Published:	2026-09-16 23:52 UTC
	Forecaster:	012/040

During the past 24 hours, solar activity was very low. One active sunspot regions were on the visible disk without any C-class or above flares produced. The solar wind speed maintained at about 460 km/s. The geomagnetic field was quiet to unsettled.
Within the next three days, solar activity is expected to be very low to low. The geomagnetic field is expected to be at quiet to unsettled level.
	Published:	2026-09-17 23:58 UTC
	Forecaster:	039/022

During the past 24 hours, solar activity was very low. No active sunspot regions were on the visible disk without any C-class or above flares produced. The solar wind speed decreased to about 420 km/s. The geomagnetic field was quiet.
Within the next three days, solar activity is expected to be very low to low. The geomagnetic field is expected to be at quiet to unsettled level.
	Published:	2026-09-19 00:00 UTC
	Forecaster:	015/039

WEEKLY REPORTS

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During the last week, solar activity was low. Ten sunspot active regions (AR4492, AR4494-AR4496, AR4498-AR4503) were on the visible disk without M-class or above flare produced. SEP ended on 31 Jul and the maximum proton flux reached 18.1 pfu. The F10.7 index decreased from 148 sfu to 101 sfu. Due to the effect of CME on 30 Jul, the geomagnetic field reached moderate storm levels for 3 hours and active levels for 18 hours on 2-4 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. The geomagnetic field is expected to be mainly quiet to unsettled with isolated active levels on 8 Aug and 11 Aug due to the effect of a recurrent coronal hole high speed stream.
	Published:	2026-08-07 01:21 UTC
	Forecaster:	012/016

During the last week, solar activity was very low on 7-8, 13 Aug and low for the rest of time. Twelve sunspot active regions (AR4498, AR4510, AR4502-AR4511) were on the visible disk without M-class or above flare produced. No SEP event occurred. The F10.7 index fluctuate between 94 sfu and 108 sfu. Due to the effect of recurrent coronal hole high speed stream, the solar wind speed reached a peak of about 480 km/s and the geomagnetic field reached moderate storm levels for 3 hours, minor storm levels for 3 hours and active levels for 9 hours on 8-9 Aug. It was quiet to unsettled for the rest of the time.
Within the next week, solar activity is expected to be mainly low with slight chances for M-class flares. The geomagnetic field is expected to be mainly quiet to unsettled with isolated active levels on 14-15 Aug due to the effect of a coronal hole high speed stream.
	Published:	2026-08-14 00:55 UTC
	Forecaster:	039/015

During the last week, solar activity was high on 20 Aug, moderate on 19 Aug and low for the rest of time. Ten sunspot active regions (AR4503, AR4506-AR4514) were on the visible disk with 4 M-class flares produced. No SPE event occurred. The F10.7 index fluctuated between 114 sfu and 129 sfu. Due to the effect of recurrent coronal hole high speed streams, the solar wind speed reached a peak of about 630 km/s and the geomagnetic field reached minor storm levels for 9 hours, active levels for 18 hours on 17-19 Aug. It was quiet to unsettled 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. The geomagnetic field is expected to be mainly at quiet to unsettled levels. The greater than 2 MeV electron flux at geosynchronous orbit will reach minor storm levels on 21-23 Aug.
	Published:	2026-08-21 01:20 UTC
	Forecaster:	012/040

During the last week, solar activity was high on 25 Aug, moderate on 21, 24 and 26 Aug and low for the rest of time. Eight sunspot active regions (AR4508, AR4513-AR4519) were on the visible disk with 8 M-class flares produced. No SPE event occurred. The F10.7 index fluctuated between 122 sfu and 143 sfu. The solar wind speed decreased from 550km/s to 250km/s. The geomagnetic field was at quiet to unsettled levels. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 22 Aug.
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 active levels to minor storm levels on 28 Aug due to the effects of a coronal hole high speed stream and the CME from 25 Aug. It is expected to be mainly at quiet to unsettled levels for the rest of the time.
	Published:	2026-08-28 01:10 UTC
	Forecaster:	016/042

During the last week, solar activity was moderate on 2 Sep and low for the rest of the time. Ten active sunspot regions (AR4513, AR4515, AR4517-AR4524) were on the visible disk with 1 M-class flare produced. No solar proton event occurred. The F10.7 index fluctuated between 101 sfu and 116 sfu. Due to the effects of a coronal hole high speed stream and the CME from 25 Aug, the solar wind speed increased to a peak of 470 km/s and the geomagnetic field reached active levels for 27 hours on 28-30 Aug, 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 1-2 Sep.
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.
	Published:	2026-09-04 01:11 UTC
	Forecaster:	022/026

During the last week, solar activity was moderate on 4-5 Sep and low for the rest of the time. Nine active sunspot regions (AR4521, AR4523-AR4530) were on the visible disk with 2 M-class flares produced. The greater than 10 MeV proton flux at geosynchronous orbit reached the level of a minor solar proton event on 5 Sep and the maximum proton flux reached 18 pfu. The F10.7 index increased from 108 sfu to 115 sfu. Due to the effects of the CMEs from 5-6 Sep and a coronal hole high speed stream, the solar wind speed increased to a peak of 650 km/s and the geomagnetic field reached minor storm levels for 6 hours and active levels for 24 hours on 7-8 Sep, 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 9-10 Sep.
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 active levels to minor storm levels on 14-15 Sep due to the effect of a coronal hole high speed stream. It is expected to be mainly at quiet to unsettled levels for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit will maintained at minor storm level on 11-12 Sep.
	Published:	2026-09-11 01:05 UTC
	Forecaster:	039/015

During the last week, solar activity was low on 12-13 Sep and very low for the rest of the time. Seven active sunspot regions (AR4521, AR4524-AR4525, AR4523-AR4530) were on the visible disk without any M-class or above flares produced. No Solar Proton Event occurred. The F10.7 index decreased from 114 sfu to 97 sfu. Due to the effects of a recurrent coronal hole high speed stream, the solar wind speed increased to a peak of about 600 km/s and the geomagnetic field was at active levels for 6 hours on 14-16 Sep and 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 and 14 Sep.
Within the next week, solar activity is expected to be very low to low with chances for C-class flares. The geomagnetic field is expected to reach active levels to minor storm levels on 24 Sep due to the effect of a recurrent coronal hole high speed stream. It is expected to be mainly at quiet to unsettled levels for the rest of the time.
	Published:	2026-09-18 00:24 UTC
	Forecaster:	039/022

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.