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ARCHIVE

DAILY REPORTS

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During the past 24 hours, solar activity was moderate. Three active sunspot regions were on the visible disk with 3 M-class flares produced. The solar wind speed decreased to about 370 km/s, and the geomagnetic field was at quiet to unsettled levels.
Within the next three days, solar activity is expected to be moderate to high with chances for M-class flares. The geomagnetic field is expected to reach storm levels on 3-4 Jul due to the effects of the CME from 30 Jun. It will be quiet to unsettled on 5 Jul.
	Published:	2026-07-03 00:02 UTC
	Forecaster:	027/039

During the past 24 hours, solar activity was high. Four active sunspot regions were on the visible disk with five M-class flares produced. The solar wind speed increased to about 560 km/s, and the geomagnetic field was at active levels for 6 hours and at quiet to unsettled levels for the rest of the time.
Within the next three days, solar activity is expected to be moderate to high with chances for M-class flares. The geomagnetic field is expected to reach active to storm levels on 4 Jul due to the continuous effects of the CME from 30 Jun. It will be mainly quiet to unsettled on the rest of the time.
	Published:	2026-07-03 23:53 UTC
	Forecaster:	012/016

During the past 24 hours, solar activity was high. Five active sunspot regions were on the visible disk with an X1.3 flare and fifteen M-class flares produced. Due to the effect of the CME on 30 Jun, the solar wind speed increased to about 650 km/s, and the geomagnetic field reached major storm level for 3 hours, moderate storm levels for 12 hours and minor storm levels for 9 hours.
Within the next three days, solar activity is expected to be moderate to high with chances for M-class flares. The geomagnetic field is expected to reach active to minor storm levels on 5-6 Jul due to the effects of the CME. It will be mainly quiet to unsettled on 7 Jul.
	Published:	2026-07-05 00:02 UTC
	Forecaster:	016/042

During the past 24 hours, solar activity was high. Eight active sunspot regions were on the visible disk with ten M-class flares produced. The solar wind speed decreased to about 440 km/s, and the geomagnetic field reached active levels for 6 hours and was unsettled for the rest of time.
Within the next three days, solar activity is expected to be moderate to high with chances for M-class flares and slight chances for X-class flares. The geomagnetic field is expected to reach active to minor storm levels on 8 Jul due to the effect of the recurrent coronal hole high speed stream. It will be mainly quiet to unsettled for the rest of time.
	Published:	2026-07-05 23:58 UTC
	Forecaster:	042/025

During the past 24 hours, solar activity was low. Five active sunspot regions were on the visible disk without M-class and above flares produced. The solar wind speed decreased to about 420 km/s, and the geomagnetic field was quiet to unsettled.
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 active to minor storm levels on 9 Jul due to the effect of the recurrent coronal hole high speed stream. It will be mainly quiet to unsettled for the rest of time.
	Published:	2026-07-06 23:47 UTC
	Forecaster:	025/040

During the past 24 hours, solar activity was moderate. Three active sunspot regions were on the visible disk with one M-class flare produced. The solar wind speed decreased to about 400km/s, and the geomagnetic field was quiet. 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 moderate with chances for M-class and above flares. The geomagnetic field is expected to reach active to minor storm levels on 9-10 Jul due to the effect of the recurrent coronal hole high speed stream. It will be mainly quiet to unsettled for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit maintained at minor storm levels on 8 Jul.
	Published:	2026-07-08 00:04 UTC
	Forecaster:	040/012

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 maintained at about 400km/s, and the geomagnetic field was at quiet to unsettled levels.
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 active to minor storm levels on 9-10 Jul due to the effect of the recurrent coronal hole high speed stream. It will be mainly quiet to unsettled for the rest of time.
	Published:	2026-07-08 23:55 UTC
	Forecaster:	012/039

WEEKLY REPORTS

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During the last week, solar activity was moderate on 16-17 May and low on the other days. Nine sunspot active regions (AR4435-AR4436, AR4438-AR4444) were on the visible disk with four M-class flares produced. No solar proton event occurred. The F10.7 index ranged from 101 sfu to 118 sfu. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed reached a peak of about 730km/s, and the geomagnetic field reached moderate storm levels for 6 hours, minor storm levels for 15 hours and active levels for 9 hours on 15-16 May. Due to the effect of a CME on 16 May, the solar wind speed reached a peak of about 630km/s and the geomagnetic field reached active levels for 12 hours on 19 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 17-19 May and 21 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 22-23 May and isolated active to minor storm levels on 27-28 May due to the effect of a recurrent coronal hole high speed stream. It is expected to be quiet to unsettled for the rest of the time.
	Published:	2026-05-22 01:51 UTC
	Forecaster:	012/042

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

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.