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ARCHIVE

DAILY REPORTS

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During the past 24 hours, solar activity was moderate. Five active sunspot regions were on the visible disk with one M-class flare produced. The solar wind speed increased to about 600km/s due to the recurrent coronal hole high speed stream, and the geomagnetic field reached active levels for 9 hours and quiet to unsettled levels for the rest of time.
Within the next three days, solar activity is expected to be moderate with chances for M-class and above flares. The geomagnetic field is expected to reach isolated active levels on 10-11 Jul due to the continuous effect of the recurrent coronal hole high speed stream. It will be at minor storm levels on 12 Jul due to the effect of CME from 9 Jul.
	Published:	2026-07-10 00:04 UTC
	Forecaster:	039/022

During the past 24 hours, solar activity was low. Four active sunspot regions were on the visible disk without any M-class or above flare produced. The solar wind speed slowly decreased to about 580km/s due to the residual effects of the recurrent coronal hole high speed stream, and the geomagnetic field was at active levels for 3 hours and quiet to unsettled levels for the rest of time.
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 isolated active levels on 11 Jul due to the continuous effects of the recurrent coronal hole high speed stream. It will be at minor storm levels on 12-13 Jul due to the effects of the CME from 9 Jul.
	Published:	2026-07-10 23:57 UTC
	Forecaster:	022/027

During the past 24 hours, solar activity was low. Four active sunspot regions were on the visible disk without any M-class or above flare produced. The solar wind speed maintained at about 550km/s. The geomagnetic field was at quiet levels. The greater than 2 MeV electron flux at geosynchronous orbit reached 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 reach minor storm levels for short period on 12-13 Jul due to the effects of the CME from 9 Jul. It will be mainly quiet to unsettled on 14 Jul.
	Published:	2026-07-12 00:07 UTC
	Forecaster:	027/026

During the past 24 hours, solar activity was moderate. Four active sunspot regions were on the visible disk with one M-class flare produced. Due to the effect of CME on 9 Jul, the solar wind speed reached a peak of about 590km/s. The geomagnetic field was at minor storm levels for 3 hours and active levels for 6 hours, it was quiet to unsettled levels for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit maintained 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 active to minor storm levels for short period on 13-14 Jul due to the effects of the CME from 10 Jul. It will be mainly quiet to unsettled on 15 Jul.
	Published:	2026-07-12 23:50 UTC
	Forecaster:	040/010

During the past 24 hours, solar activity was low. Four active sunspot regions were on the visible disk without M-class and above flare produced. The solar wind speed decreased to about 430km/s. The geomagnetic field was at active levels for 3 hours and was quiet for the rest of time.
Within the next three days, solar activity is expected to be low to moderate with a slight chance for M-class flares. The geomagnetic field is expected to reach active levels for short period on 14 Jul due to the effect of the CME from 10 Jul. It will be mainly quiet to unsettled on 15-16 Jul.
	Published:	2026-07-13 23:38 UTC
	Forecaster:	010/042

During the past 24 hours, solar activity was low. Three active sunspot regions were on the visible disk without M-class and above flare produced. The solar wind speed increased to about 440km/s. The geomagnetic field was quiet.
Within the next three days, solar activity is expected to be mainly low with a slight chance for M-class flares. The geomagnetic field will be mainly quiet to unsettled.
	Published:	2026-07-14 23:48 UTC
	Forecaster:	042/015

During the past 24 hours, solar activity was low. Two active sunspot regions were on the visible disk without M-class and above flare produced. Solar wind speed reached a peak of 507 km/s. The geomagnetic field was active for 3 hours, and 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 was at active levels for 3 hours and quiet to unsettled for the rest of the time.
	Published:	2026-07-15 23:55 UTC
	Forecaster:	015/040

WEEKLY REPORTS

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During the last week, solar activity was moderate on 22 May and low on the other days. Fourteen sunspot active regions (AR4439, AR4441, AR4444-AR4455) were on the visible disk with one M-class flare produced. The greater than 10 MeV proton flux at geosynchronous orbit reached the level of a minor solar proton event on 26 May and the maximum proton flux reached 24 pfu. The F10.7 index ranged from 124 sfu to 145 sfu. The geomagnetic field reached active level for 3 hours on 26 May. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed reached a peak of about 480km/s, and the geomagnetic field reached active level for 3 hours on 28 May. 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 22-24 May.
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 isolated active levels on 29 May. It is expected to be quiet to unsettled for the rest of the time.
	Published:	2026-05-29 03:05 UTC
	Forecaster:	026/016

During the last week, solar activity was high on 3 Jun, moderate on 29 May and 2 Jun, and low on the other days. Fourteen sunspot active regions (AR4444, AR4446-AR4447, AR4449, AR4452, AR4454-AR4462) were on the visible disk with one X1.0 and six M-class flares produced. No solar proton event occurred. The F10.7 index ranged from 132 sfu to 148 sfu. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed reached a peak value of about 550km/s, and the geomagnetic field was at active levels for 12 hours on 29-31 May. 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 a chance for M-class flares. Due to the effects of multiple CMEs on 3 Jun, the geomagnetic field is expected to reach storm levels on 5-6 Jun. It is expected to be quiet to unsettled for the rest of the time.
	Published:	2026-06-05 05:29 UTC
	Forecaster:	027/022

During the last week, solar activity was moderate on 6 Jun, and low on the other days. Eleven sunspot active regions (AR4455-AR4459, AR4461-AR4466) were on the visible disk with one M1.0 flare produced. No solar proton event occurred. The F10.7 index ranged from 124 sfu to 141 sfu. Due to the effect of CMEs from 3 Jun, the solar wind speed reached a peak value of about 730km/s, and the geomagnetic field was at moderate storm level for 3 hours, minor storm levels for 9 hours and active levels for 9 hours on 5-6 Jun. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed reached a peak value of about 510km/s, and the geomagnetic field was at minor storm level for 3 hours and active level for 3 hours on 11 Jun. 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 on 7 Jun.
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 mainly quiet to unsettld and reach isolated storm and active levels on 12-14 Jun due to the effect of the recurrent coronal hole high speed stream and CME.
	Published:	2026-06-12 07:04 UTC
	Forecaster:	025/039

During the last week, solar activity was low. Nine sunspot active regions (AR4462-AR4466, AR4468-AR4471) were on the visible disk without M-Class flare produced. No solar proton event occurred. The F10.7 index ranged from 111 sfu to 128 sfu. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed reached a peak value of about 570km/s, and the geomagnetic field was at active level for 6 hours on 12 Jun. Due to the effect of CME from 11 Jun, the solar wind speed reached a peak value of about 630km/s, and the geomagnetic field was at active levels for 3 hours on 13 Jun. 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 a chance for M-class flares. The geomagnetic field is expected to mainly quiet to unsettld and reach isolated active levels on 24-25 Jun due to the effect of the recurrent coronal hole high speed stream.
	Published:	2026-06-19 01:50 UTC
	Forecaster:	040/012

During the last week, solar activity was high on 21 June, moderate on 20 June, low for the rest of time. Eleven sunspot active regions (AR4465, AR4470-AR4479) were on the visible disk with four M-Class flare produced. No solar proton event occurred. The F10.7 index increased from 111 sfu to 156 sfu. Due to the effect of recurrent coronal hole high speed streams, the solar wind speed reached a peak of about 720 km/s, and the geomagnetic field was at minor storm level for 3 hours, active levels for 21 hours during 24-25 Jun. 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 or above flares. The geomagnetic field is expected to mainly quiet to unsettld and reach isolated active levels on 26 Jun due to the continuous effect of the recurrent coronal hole high speed streams.
	Published:	2026-06-26 02:01 UTC
	Forecaster:	042/012

During the last week, solar activity was high on 30 Jun and 1 Jul, moderate on 29 Jun and 2 Jul, low for the rest of time. Six sunspot active regions (AR4475-AR4480) were on the visible disk with one X1.1 flare and seventeen M-Class flares produced. No solar proton event occurred. The F10.7 index increased from 163 sfu to 203 sfu. Due to the effect of CME from 26 Jun, the solar wind speed reached a peak of about 430 km/s. Due and the geomagnetic field was at minor storm level for 6 hours, active levels for 6 hours during 30 Jun-1 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 27-30 Jun.
Within the next week, solar activity is expected to be mainly moderate with a chance for M-class or above flares. The geomagnetic field is expected to reach storm levels on 3-4 Jul due to the effects of the CME from 30 Jun, and reach active to minor storm levels on 8-9 Jul due to the recurrent coronal hole high speed streams. It will be quiet to unsettled for the rest of the time.
	Published:	2026-07-03 05:24 UTC
	Forecaster:	039/027

During the last week, solar activity was high on 3-5 Jul, moderate on 7-9 Jul, and low on 6 Jul. Ten sunspot active regions (AR4478-AR4487) were on the visible disk with one X1.3 flare and 33 M-Class flares produced. No solar proton event occurred. The F10.7 index decreased from 187 sfu to 110 sfu. Due to the effects of the three CMEs produced on 30 Jun and 1 Jul, the solar wind speed reached a peak value of about 650 km/s and IMF Bz decreased to about -20 nT between 3 Jul and 5 Jul, during which the geomagnetic field was at major storm levels for 3 hours, moderate storm levels for 12 hours, minor storm level for 9 hours and active levels for 12 hours. The geomagnetic field 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 7 Jul.
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 for isolated time periods on 10 and 11 Jul due to the persistent effects of the recurrent coronal hole high speed stream. Minor geomagnetic storm level is expected on 12-13 Jul as the arrvial of the CME produced on 9 Jul. It will be quiet to unsettled for the rest of the time.
	Published:	2026-07-10 02:13 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.