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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 visble disk without M-class or above flares produced. The solar wind speed decreased to about 450 km/s. Due to the effect of the CME on 22 Mar, the geomagnetic field was at minor storm levels for 3 hours and active levels for 3 hours. It was at 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 low. The geomagnetic field is expected to be mainly quiet to unsetteld. The greater than 2 MeV electron flux at geosynchronous orbit will maintain at minor storm levels on 26-28 Mar.
	Published:	2026-03-25 23:49 UTC
	Forecaster:	012/042

During the past 24 hours, solar activity was moderate. Seven active sunspot regions were on the visble disk with one M3.9 flares produced. The solar wind speed decreased to about 450 km/s. The geomagnetic field was quiet to unsettled. 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 low to moderate with a chance for M-class and above flare. The geomagnetic field is expected to be mainly quiet to unsetteld. It will reach active levels on 29 Mar due to the effect 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 27-29 Mar.
	Published:	2026-03-26 23:47 UTC
	Forecaster:	042/025

During the past 24 hours, solar activity was moderate. Nine active sunspot regions were on the visble disk with no M-class flares produced. The solar wind speed decreased to about 380 km/s. The geomagnetic field was quiet. 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 low to moderate with a chance for M-class flares. The geomagnetic field is expected to reach active or storm levels on 28-29 Mar due to the effect of a recurrent coronal hole high speed stream and will be 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 28-29 Mar.
	Published:	2026-03-27 23:59 UTC
	Forecaster:	025/040

During the past 24 hours, solar activity was moderate. Eight active sunspot regions were on the visble disk with one M1.3 flare produced. The solar wind speed decreased to about 350 km/s. The geomagnetic field was quiet to unsettled. 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 low to moderate with a chance for M-class flares. The geomagnetic field is expected to reach active or storm levels on 29-30 Mar due to the effect of a recurrent coronal hole high speed stream and will be quiet to unsettled for the rest of the time.
	Published:	2026-03-29 00:03 UTC
	Forecaster:	040/022

During the past 24 hours, solar activity was low. Nine active sunspot regions were on the visble disk without any M-class or above flare produced. The solar wind speed increased to about 450 km/s as the arrival of a recurrent coronal hole high speed stream. The geomagnetic field was at active levels for 6 hours, and quiet to unsettled levels for the rest of the 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 active to minor storm levels on 30 Mar due to the effect of the recurrent coronal hole high speed stream and will be mainly quiet to unsettled for the rest of the time.
	Published:	2026-03-30 00:01 UTC
	Forecaster:	022/027

During the past 24 hours, solar activity was high. Ten active sunspot regions were on the visble disk with an X1.4 flare produced by AR4405. The solar wind speed maintained at about 450 km/s. The geomagnetic field was at quiet to unsettled levels.
Within the next three days, solar activity is expected to be low to moderate with chances for M-class flares. Due to the arrival of the CME from 30 Mar, the geomagnetic field is expected to reach storm levels on 31 Mar and 1 Apr. Due to the effect of the coronal hole high speed stream, it will reach active or minor storm levels on 2 Apr.
	Published:	2026-03-31 00:09 UTC
	Forecaster:	027/026

During the past 24 hours, solar activity was low. Ten active sunspot regions were on the visble disk without M-class or above flares produced. The solar wind speed decreased to about 400 km/s. The geomagnetic field was at quiet to unsettled levels.
Within the next three days, solar activity is expected to be low to moderate with chances for M-class flares. Due to the arrival of the CME from 30 Mar, the geomagnetic field is expected to reach minor or moderate storm levels on 1 Apr. Due to the effect of the recurrent coronal hole high speed stream, it will reach active or minor storm levels on 2-3 Apr.
	Published:	2026-03-31 23:56 UTC
	Forecaster:	026/016

WEEKLY REPORTS

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During the last week, solar activity was low to moderate, moderate on 8-12 Feb and low for the rest of the time. Eleven active sunspot regions (AR4358, AR4362, AR4366-AR4371, AR4373-AR4375) were on the visible disk with 8 M-Class flares produced. No solar proton event occured. The F10.7 index decreased from 169 sfu to 129 sfu. Due to the continuous effect of the CME from 2 Feb, the geomagnetic field reached active levels for 15 hours on 6-7 Feb. The geomagnetic field reached active levels for 9 hours on 10-11 Feb. It was quiet to unsettled for the rest of the time.
Within the next week, solar activity is expected to be mainly low with chances for M-class flares. The geomagnetic field is expected to reach isolated active or minor storm levels on 14-16 Feb 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:	2026-02-13 01:38 UTC
	Forecaster:	027/022

During the last week, solar activity was low to moderate, moderate on 13, 16 Feb and low for the rest of time. Six active sunspot regions (AR4369, AR4373-AR4377) were on the visible disk with two M-Class flares produced. No solar proton event occured. The F10.7 index ranged from 116 sfu to 122 sfu. The solar wind speed increased to 420km/s and the geomagnetic field was at active levels for 6 hours. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed reached the peak of 700km/s and the geomagnetic field was at moderate storm levels for 3 hours, minor storm levesl for 6 hours, active levels for 18 hours on 14-16 Feb. It was quiet to unsettled for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 18,19 Feb.
Within the next week, solar activity is expected to be mainly low with little chances for M-class flares. The geomagnetic field is expected to reach active to minor storm levels on 24-26 Feb 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 will remain at minor storm levels on 20-22 Feb.
	Published:	2026-02-20 01:54 UTC
	Forecaster:	010

During the last week, solar activity was moderate on 25 Feb, very low on 21 Feb and 23 Feb, and low on the rest of the time. Six active sunspot regions (AR4374-AR4375, AR4377-AR4380) were on the visible disk with one M-Class flare produced. No solar proton event occured. The F10.7 index ranged from 108 sfu to 130 sfu. Due to the effect of the CME on 16 Feb, the geomagnetic field was at active levels for 6 hours on 20-21 Feb. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed reached to a peak value of 720 km/s and the geomagnetic field was at minor storm levels for 12 hours, and active levels for 48 hours on 21-26 Feb. It was quiet to unsettled for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 20, 23-26 Feb.
Within the next week, solar activity is expected to be mainly low to 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 remain at minor storm levels on 27 Feb-1 Mar.
	Published:	2026-02-27 00:45 UTC
	Forecaster:	041/012

During the last week, solar activity was low. Nine active sunspot regions (AR4378-AR4386) were on the visible disk without M-Class flare produced. No solar proton event occured. The F10.7 index ranged from 139 sfu to 148 sfu. The solar wind speed reached a peak value of 440 km/s and the geomagnetic field was at minor storm levels for 3 hours on 3 Mar. It was quiet to unsettled for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 27 Feb to 2 Mar.
Within the next week, solar activity is expected to be mainly low with chances for M-class flares. Due to the effect of the recurrent coronal hole high speed streams, the geomagnetic field is expected to reach isolated active or minor storm periods during 6-9 Mar. It will be mainly quiet to unsettled for the rest of time.
	Published:	2026-03-06 01:05 UTC
	Forecaster:	010/042

During the last week, solar activity was low. 12 active sunspot regions (AR4378, AR4381, AR4384-AR4393) were on the visible disk without any M-Class and above flares produced. No solar proton event occurred. The F10.7 index decreased from 143 sfu to 121 sfu. Due to the effect of the recurrent coronal hole high speed streams, the solar wind speed reached a peak value of 680 km/s and the geomagnetic field was at minor storm levels for 3 hours, active levels for 21 hours on 7-8 Mar. The solar wind speed reached a peak value of 560 km/s and the geomagnetic field was at active levels for 6 hours on 10-11 Mar. It was quiet to unsettled for the rest of the time.
Within the next week, solar activity is expected to be mainly low with a little chance for M-class flares. Due to the effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated active or minor storm periods during 13-16 Mar. It will be mainly 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 17-19 Mar.
	Published:	2026-03-13 01:18 UTC
	Forecaster:	027/026

During the last week, solar activity was moderate on 13, 15-18 Mar., and low on 14 and 19 Mar. 11 active sunspot regions (AR4384, AR4388-AR4397) on the visible disk produced 5 M-Class flares, and earth-directed CMEs were observed with the M-Class flares on 16 and 18 Mar. No solar proton event occurred. The F10.7 index decreased from 120 sfu to 106 sfu. 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 on 13-15 Mar and the geomagnetic field was at moderate storm levels for 9 hours, minor storm levels for 9 hours, and active levels for 21 hours. The geomagnetic field was quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit was at minor storm levels on 18-19 Mar.
Within the next week, solar activity is expected to be mainly low with a little chance for M-class flares. Due to the effects of the CMEs on 16 and 18 Mar, as well as the arrival of a recurrent coronal hole high speed stream, the geomagnetic field is expected to reach minor storm levels on 20-22 Mar, active levels on 23-24 Mar, and return to quiet to unsettled levels on 25-26 Mar. The greater than 2 MeV electron flux at geosynchronous orbit will reach minor storm levels on 24-26 Mar.
	Published:	2026-03-20 01:31 UTC
	Forecaster:	040/022

During the last week, solar activity was moderate on 26 Mar, and low on other time. 8 active sunspot regions (AR4392, AR4397-AR4403) were on the visible disk with 1 M-class flare produced. No solar proton event occurred. The F10.7 index increased from 102 sfu to 152 sfu. Due to the effects of the CMEs on 16, 18 and a recurrent coronal hole high speed stream, the solar wind speed reached a peak value of about 530 km/s and the geomagnetic field reached major storm levles for 6 hours, moderate storm levels for 6 hours, minor storm levels for 3 hours, and active levels for 12 hours on 20-21 Mar. Due to the effect of the coronal hole high speed stream, the solar wind speed reached a peak value of about 760 km/s and the geomagnetic field reached major storm levles for 6 hours, moderate storm levels for 9 hours, minor storm levels for 15 hours, and active levels for 18 hours on 22-24 Mar. Due to the effect of the CME on 22, the geomagnetic field reached minor storm levels for 3 hours, and active levels for 3 hours on 25 Mar. The geomagnetic field was quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit was at minor storm levels on 23-26 Mar.
Within the next week, solar activity is expected to be low to moderate with chance for M-class flares. Due to the effect of a recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated active or minor storm levels on 28-29 Mar and 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 27-28 Mar.
	Published:	2026-03-27 01:18 UTC
	Forecaster:	042/025

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.