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ARCHIVE

DAILY REPORTS

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During the past 24 hours, solar activity was moderate. Six sunspot active regions were on the visble disk with one M1 flare produced. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed decreased to about 600 km/s, and the geomagnetic field reached active levels for 9 hours. It was quiet to unsettled for the rest of the time.
Within the next three days, solar activity is expected to be mainly low. The geomagnetic field is expected to reach isolated active levels on 16 Mar due to the continuous effect of the recurrent coronal hole high speed stream. It 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 during 17-18.
	Published:	2026-03-15 22:59 UTC
	Forecaster:	042/012

During the past 24 hours, solar activity was moderate. Four sunspot active regions were on the visble disk with one M2.7-class flare produced. The solar wind speed decreased to about 490 km/s, and the geomagnetic field was quiet to unsettled.
Within the next three days, solar activity is expected to be mainly low. The geomagnetic field is expected to be mainly at quiet to unsettled levels with isolated active to storm levels on 19 Mar due to the effect of the CME on 16 Mar.
	Published:	2026-03-17 00:16 UTC
	Forecaster:	012/041

During the past 24 hours, solar activity was moderate. Four sunspot active regions were on the visble disk with one M1.3-class flare produced. The solar wind speed decreased to about 430 km/s. The geomagnetic field was quiet.
Within the next three days, solar activity is expected to be low to moderate. The geomagnetic field is expected to reach isolated active to storm levels on 19, 20 Mar due to the effect of the CME on 16 Mar. It will be quiet to unsettled levels on the rest of the time.
	Published:	2026-03-18 00:03 UTC
	Forecaster:	041/015

During the past 24 hours, solar activity was moderate. Five sunspot active regions were on the visble disk with one M-class flare 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 reached minor storm levels.
Within the next three days, solar activity is expected to be low to moderate. The geomagnetic field is expected to reach isolated active to storm levels on 19-21 Mar due to the effect of the CMEs on 16-18 Mar.
	Published:	2026-03-19 00:05 UTC
	Forecaster:	015/040

During the past 24 hours, solar activity was low. Two sunspot active regions were on the visble disk without M-class flare produced. The solar wind speed decreased to about 350 km/s. The geomagnetic field was quiet. 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. The geomagnetic field is expected to reach storm levels on 20-22 Mar due to the effects of the CMEs on 16-18 Mar and the recurrent coronal hole high speed stream.
	Published:	2026-03-20 00:07 UTC
	Forecaster:	040/022

During the past 24 hours, solar activity was very low. Two sunspot active regions were on the visble disk without any C-class flare or above produced. The solar wind speed increased to about 520 km/s as the arrivals of the CMEs produced on 16 and 18 Mar. The geomagnetic field was at major storm levels for 3 hours, moderate storm levels for 3 hours, active levels for 6 hours, and quiet to unsettled levels for the rest of time.
Within the next three days, solar activity is expected to be very low to low. The geomagnetic field is expected to reach storm levels on 21-22 Mar, active levels on 23 Mar due to the effects of the CMEs on 16 and 18 Mar and a recurrent coronal hole high speed stream.
	Published:	2026-03-20 23:57 UTC
	Forecaster:	022/027

During the past 24 hours, solar activity was low. Four sunspot active regions were on the visble disk without any M-class flare or above produced. Due to the CME from 18 Mar and the recurrent coronal hole high speed stream, the solar wind speed increased to about 530 km/s. The geomagnetic field was at major storm levels for 3 hours, moderate storm levels for 3 hours, minor storm levels for 3 hours and active levels for 6 hours.
Within the next three days, solar activity is expected to be mainly low. Due to the continuous effects of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach storm levels on 22-23 Mar, active levels on 24 Mar.
	Published:	2026-03-22 00:03 UTC
	Forecaster:	027/026

WEEKLY REPORTS

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During the last week, solar activity was extremely high on 1 Feb, high on 2-5 Feb and low for the rest of the time. Fifteen active sunspot regions (AR4349, AR4357-AR4360, AR4362-AR4363, AR4365-AR4372) were on the visible disk with 6 X-class and 61 M-Class flares produced. No solar proton event occured. The F10.7 index ranged from 128 sfu to 178 sfu. Due to the continuous effect of the recurrent coronal hole high speed stream, the geomagnetic field reached active levels for 3 hours on 30 Jan. Due to the arrival of the CME which associated with X8.1 flare on 2 Feb, the solar wind speed reached a peak value of 610 km/s, and the geomagnetic field reached minor storm levels for 6 hours and active levels for 9 hours on 4-5 Feb. The geomagnetic field was quiet to unsettled on the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit maintained at minor storm levels during 30 Jan - 4 Feb.
Within the next week, solar activity is expected to be mainly moderate with chances for M-class and above flares. The geomagnetic field is expected to reach isolated active levels on 6-7 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:	2026-02-06 03:09 UTC
	Forecaster:	027/026

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

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.