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ARCHIVE

DAILY REPORTS

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During the past 24 hours, solar activity was moderate. Eight active sunspot regions were on the visible disk. An M2.4 flare and several C-Class flares were produced. The solar wind speed decreased to about 500 km/s. The geomagnetic field was quiet to unsettled.
Within the next three days, solar activity is expected to be mainly moderate, with a chance of M-Class and above flares. The geomagnetic field is expected to be quiet to unsettled.
	Published:	2022-05-17 00:10 UTC
	Forecaster:	037/012

During the past 24 hours, solar activity was low. Eight active sunspot regions were on the visible disk. Several C-Class flares were produced. The solar wind speed reached a peak value of about 590 km/s. The geomagnetic field was quiet to unsettled.
Within the next three days, solar activity is expected to be low to moderate, with a chance of M-Class and above flares. The geomagnetic field is expected to be quiet to unsettled.
	Published:	2022-05-17 23:51 UTC
	Forecaster:	012/010

During the past 24 hours, solar activity was moderate. Seven sunspot regions were on the visible disk with one M1 flare and several C-Class flares produced. The solar wind speed decreased to about 450 km/s. The geomagnetic field was quiet to unsettled.
Within the next three days, solar activity is expected to be low to moderate, with a chance of M-Class and above flares. The geomagnetic field is expected to be quiet to unsettled.
	Published:	2022-05-18 23:57 UTC
	Forecaster:	010/041

During the past 24 hours, solar activity was high. Eight sunspot regions were on the visible disk with one M5.6-Class flare, two M1-Class flares and several C-Class flares produced. Region 3014 increased to 1100 sunspot unit areas with Beta-Gamma-Delta type. The solar wind speed increased to about 520 km/s. The geomagnetic field was quiet to unsettled.
Within the next three days, solar activity is expected to be moderate, with high possibility of producing M-Class and above flares. The geomagnetic field is expected to be quiet to unsettled.
	Published:	2022-05-20 00:09 UTC
	Forecaster:	041/012

During the past 24 hours, solar activity was moderate. Seven sunspot regions were on the visible disk with one M3.0-Class flare and five C-Class flares produced. Region 3014 increased to 1190 sunspot unit areas with Beta-Gamma-Delta type. The solar wind speed increased to about 600 km/s. The geomagnetic field reached active levels for 3 hours and was at quiet to unsettled levels during the other time.
Within the next three days, solar activity is expected to be moderate, with high possibility of producing M-Class and above flares. The geomagnetic field is expected to be quiet to unsettled.
	Published:	2022-05-20 23:50 UTC
	Forecaster:	012/040

During the past 24 hours, solar activity was low. Seven sunspot regions were on the visible disk. Region 3014 increased to 940 solar area units with Beta-Gamma-Delta type. The solar wind speed decreased to about 480 km/s. The geomagnetic field was at quiet to unsettled levels.
Within the next three days, solar activity is expected to be moderate, with high possibility of producing M-Class and above flares. The geomagnetic field is expected to be quiet to unsettled.
	Published:	2022-05-22 00:10 UTC
	Forecaster:	040/026

During the past 24 hours, solar activity was low. Nine sunspot regions were on the visible disk. Region 3014 decreased to 890 solar area units with Beta-Gamma-Delta type. The solar wind speed maintained at about 500km/s. The geomagnetic field was at active levels for three hours, and at quiet to unsettled levels for the rest time.
Within the next three days, solar activity is expected to be low to moderate, with possibility of producing M-Class and above flares. The geomagnetic field is expected to be quiet to unsettled.
	Published:	2022-05-23 00:12 UTC
	Forecaster:	021/012

WEEKLY REPORTS

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During the last week, solar activity was moderate on 2 Apr, low on the other days. Nine sunspot regions were on the visible disk (2975-2976, 2978, 2981-2986) with 3 M-class flares and 49 C-class flares produced. The solar proton event occurred at geosynchronous orbit from 14:40 on 2 Apr to 00:10 on 3 Apr, and reached a peak value of 32pfu. The F10.7 index decreased from 147 sfu to 111 sfu. Due to the continuous effect of the two CMEs from 28 Mar, the geomagnetic field reached active levels for 9 hours on 1 Apr. Due to the effect of CME on 30 Mar, the solar wind speed reached a peak of about 580 km/s on 2 Apr, and the geomagnetic field reached minor storm levels for 3 hours and active levels for 18 hours during 2-4 Apr. Due to the effect of CME on 3 Apr, the solar wind speed reached a peak of about 460 km/s, and the geomagnetic field reached active levels for 6 hours on 7 Apr. The geomagnetic field was quiet to unsettled on other period of time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 5-6 Apr.
Within next week, solar activity is expected to be low to moderate with a chance for M-class flares. Due to the persist effect of CME on 3 Apr, the geomagnetic field is expected to reach active levels on 8 Apr. Due to the effects of coronal high speed stream, the geomagnetic field is expected to reach active levels on 10-11 Apr. The geomagnetic filed will be mainly quiet to unsettled on other period of time.
	Published:	2022-04-08 05:55 UTC
	Forecaster:	039/026

During the last week, solar activity was low. Eight sunspot regions were on the visible disk (AR2978, AR2981, AR2983, AR2985, AR2988-2991) with 17 C-class flares produced. The F10.7 index fluctuated between 96 sfu and 109 sfu. Due to the disturbance of interplantary magnetic, the geomagnetic field reached active levels for 15 hours on 8-9 Apr. Due to the effect of the cornoal hole high speed streams, the solar wind speed reached a peak of about 510km/s , the geomagnetic field reached strong storm level for 3 hours and minor storm level for 3 hours and active levels for 9 hours on 10-11 Apr. Due to the disturbance of interplantary magnetic, the geomagnetic field reached active levels for 6 hours on 12-13 Apr. Due to the effect of CME on 11 Apr, the solar wind speed reached a peak of about 570 km/s on 14 Apr, and the geomagnetic field reached moderate storm level for 3 hours and minor storm levels for 6 hours and active levels for 9 hours on 14 Apr. The geomagnetic field was quiet to unsettled on other period of time.
Within next week, solar activity is expected to be low to moderate. The geomagnetic field is expected to reach minor storm levels on 15 Apr due to the persistent effect of the CME on 11 Apr and is expected to reach isolated active levels on 16-17 Apr due to the effect of the coronal hole high speed stream. The geomagnetic filed will be mainly quiet to unsettled for the rest of time.
	Published:	2022-04-15 00:42 UTC
	Forecaster:	012/040

During the last week, solar activity was high on 17, 20-21 Apr and moderate on the other days. Eight sunspot regions were on the visible disk (AR2989-2996) with 2 X-class, 16 M-class and 60 C-class flares produced. AR2994 producted a X1.1 flare on 17 Apr and AR2992 producted a X2.2 flare on 20 Apr. The F10.7 index increased from 110 sfu to 164 sfu. Due to the effect of the CME occurred on 11 and the coronal hole high speed stream, the solar wind speed reached to peak value of about 650 km/s on 15-16 Apr, and the geomagnetic field reached minor storm levels for 3 hours and active levels for 6 hours on 15 Apr. The geomagnetic field was quiet to unsettled on other period of time.
Within next week, solar activity is expected to be moderate with a chance for M-class and above level flares. The geomagnetic field is expected to reach isolated active levels on 23-24 Apr due to the effect of the coronal hole high speed stream. The geomagnetic filed will be mainly quiet to unsettled for the rest of time.
	Published:	2022-04-22 01:13 UTC
	Forecaster:	041

During the last week, solar activity was moderate on 22, 25 Apr and low on the other days. Eleven sunspot regions were on the visible disk (AR2991, AR2993-3002) with 4 M-class and 44 C-class flares produced. The F10.7 index decreased from 163 sfu to 132 sfu. The solar wind speed reached to about 510 km/s on 23 Mar, and induced active levels for 15 hours on 23 Apr. Due to the effect of CME the solar wind speed increased to about 550 km/s, and the geomagnetic field reached minor storm for 6 hours and active levels for 6 hours on 27-28 Apr. The geomagnetic field was quiet to unsettled on other period of time.
Within next week, solar activity is expected to be low to moderate. The geomagnetic field is expected to reach minor storm levels on 29-30 Apr due to the effect of CME occurred on 17 Apr and coronal high speed stream. The geomagnetic filed will be mainly quiet to unsettled for the rest of time.
	Published:	2022-04-29 03:45 UTC
	Forecaster:	029/037

During the last week, solar activity was high on 30 Apr and 3-4 May, moderate on 29 Apr and 5 May, and low on the other days. Ten sunspot regions were on the visible disk (AR2994-2995, 2997, 2999-3001, 3003-3006) with 2 X-class, 14 M-class and more than 70 C-class flares produced. AR2994 producted an X1.1 flare on 30 Apr and AR3006 producted an X1.1 flare on 3 May. The F10.7 index ranged between 109 sfu to 130 sfu. Due to the effect of the recurrent coronal hole high speed stream and CME on 27 Apr, the solar wind speed increased to peak value of about 550 km/s, and the geomagnetic field reached minor storm levels for 3 hours and active levels for 9 hours during 29-30 Apr. The geomagnetic field was quiet to unsettled on other period of time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 3 May.
Within next week, solar activity is expected to be moderate to high with a large chance for M-class and above level flares. The geomagnetic filed will be mainly quiet to unsettled.
	Published:	2022-05-06 01:16 UTC
	Forecaster:	027/039

During the last week, solar activity was low on 6-9 May, high on 10 May, and moderate on 11-12 May. Eight active sunspot regions were on the visible disk (3001, 3004-3010) with 1 X-class, 4 M-class and more than 60 C-class flares produced. Region 3006 produced an X1.5 flare on 10 May. The F10.7 index ranged between 116 sfu to 133 sfu. The geomagnetic field was quiet to unsettled.
Within next week, solar activity is expected to be mainly moderate with a large chance for M-class and above level flares. Due to the effects of the CME and recurrent coronal hole high speed stream, the geomagnetic field will reached isolated active and above levels on 14-16 May, mainly quiet to unsettled for the rest time.
	Published:	2022-05-13 01:42 UTC
	Forecaster:	040/026

During the last week, solar activity was at low levels on 13-14 and 17 May, moderate levels on 15-16 and 18 May, and high levels on 19 May. Thirteen active sunspot regions were on the visible disk (AR3006-3008, AR3010-3019) with 6 M-Class and 58 C-Class flares produced. Region 3014 increased to 1100 sunspot unit areas with Beta-Gamma-Delta type. The F10.7 index ranged between 150 sfu to 180 sfu. Due to the effects of the coronal hole high speed stream, the solar wind speed increased to about 570 km/s on 15 May, the geomagnetic field reached active levels for 6 hours. The geomagnetic field was at quiet to unsettled levels during the other time..
Within next week, solar activity is expected to be mainly moderate with a large chance for M-Class and above level flares. The geomagnetic field is expected to be mainly quiet to unsettled.
	Published:	2022-05-20 01:06 UTC
	Forecaster:	012/041

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.