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ARCHIVE

DAILY REPORTS

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During the past 24 hours, solar activity was very low. Two active regions were on the visible disk, without C-Class and above falre produced. The solar wind speed increased to about 540 km/s. The geomagnetic field was at quiet to unsettled levels.
Within the next three days, solar activity is expected to be low. Due to the effect of recurrent coronal hole high speed stream, the geomagnetic field is expected to reach active levels and isolated minor storm levels on 22-24 Nov.
	Published:	2020-11-22 00:12 UTC
	Forecaster:	039/012

During the past 24 hours, solar activity was low. Three active region were on the visible disk and produced several C-class flares. The solar wind speed increased to about 620 km/s. The geomagnetic field reached active levels for 15 hours and isolated minor storm levels for 3 hours.
Within the next three days, solar activity is expected to be low. Due to the continous effect of recurrent coronal hole high speed stream, the geomagnetic field is expected to reach active levels and isolated minor storm levels on 23-25 Nov. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor storm levels on 23-25 Nov.
	Published:	2020-11-23 00:04 UTC
	Forecaster:	012/035

During the past 24 hours, solar activity was low. There were three active regions on the visible disk which produced several C-class flares. The solar wind speed decreased to about 500 km/s. The geomagnetic field was at quiet to unsettled levels.
Within the next three days, solar activity is expected to be low. Due to the effects of coronal hole high speed stream, the geomagnetic field is expected to reach isolated active levels. It will be quiet to unsettled on the other periods. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor storm levels.
	Published:	2020-11-24 00:11 UTC
	Forecaster:	035/021

During the past 24 hours, solar activity was low. There were three active regions on the visible disk. AR2785 produced a C-class flare. The solar wind speed decreased to about 400 km/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 mainly at low levels. Due to the effects of recurrent coronal hole high speed stream, the geomagnetic field is expected to be quiet to unsettled, with isolated periods for active levels. The greater than 2 MeV electron flux at geosynchronous orbit is expected to maintain at minor storm levels.
	Published:	2020-11-25 00:00 UTC
	Forecaster:	021/029

During the past 24 hours, solar activity was low. There were three active regions on the visible disk. Region 2786 increased to 1000 sunspot unit areas with Beta type and produced one C-class flare. The solar wind speed decreased to about 380 km/s. The geomagnetic field was at quiet to unsettled levels.
Within the next three days, solar activity is expected to be mainly at low levels. Due to the effects of recurrent coronal hole high speed stream, the geomagnetic field is expected to be quiet to unsettled, with isolated periods for active levels.
	Published:	2020-11-26 00:23 UTC
	Forecaster:	029/026

During the past 24 hours, solar activity was low. There were three active regions on the visible disk. Region 2786 was large with 840 sunspot unit areas and Beta-Gamma type,which produced 3 C-class flares. The solar wind speed maintained at about 400 km/s. The geomagnetic field was at quiet to unsettled levels.
Within the next three days, solar activity is expected to be mainly at low levels. The geomagnetic field is expected to be quiet to unsettled.
	Published:	2020-11-27 00:12 UTC
	Forecaster:	026/027

During the past 24 hours, solar activity was low. There were four active regions on the visible disk. Region 2786 was large with 800 area and Beta-Gamma type, which produced 1 C-class flares. The solar wind speed increased to about 470 km/s. The geomagnetic field was quiet to unsettled.
Within the next three days, solar activity is expected to be mainly at low levels with a slight chance for M-class flares. The geomagnetic field is expected to be quiet to unsettled.
	Published:	2020-11-28 00:18 UTC
	Forecaster:	027/025

WEEKLY REPORTS

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During last week, solar activity was very low without C-class and above flare produced. There were three sunspot regions on the visible disk, AR2774, AR2775 and AR2776. The F10.7 index ranged from 72 sfu to 75 sfu. The solar wind speed maintained at about 300 km/s and the geomagnetic field was quiet.
Within the next week, solar activity is expected to mainly be very low. The geomagnetic field is expected to be quiet to unsettled.
	Published:	2020-10-16 00:55 UTC
	Forecaster:	039

During last week, solar activity was low on 16 Oct and very low in the other time. There was two sunspots regions AR2776 and AR2777 on the visible disk with two C class flares produced by AR2776. The F10.7 index ranged from 73 sfu to 76 sfu. The solar wind speed reached the maximum 450 km/s on 21 Oct due to the effect of the recurrent coronal hole high speed stream. The geomagnetic field reached active levels for 3 hours on 21 Oct and was quiet to unsettled for the rest of time.
Within the next week, solar activity is expected to be very low. The geomagnetic field is expected to reach storm levels during 23-26 Oct due to the effect of the recurrent coronal hole high speed stream. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach storm levels during 25-29 Oct.
	Published:	2020-10-23 01:07 UTC
	Forecaster:	025

During last week, solar activity was very low on 23-26 Oct and low on 27-29 Oct. There were three active sunspots regions 2776, 2778 and 2779 on the visible disk. The areas of regions 2778 and 2779 were big and both produced several C-class flares. The F10.7 index increased from 73 sfu to 88 sfu. Due to the effects of several recurrent coronal hole high speed streams, the solar wind speed reached the maximum of 600 km/s and the IMF Bz reached the maximum of -10nT. The geomagnetic field reached active levels for 33 hours and was at quiet to unsettled levels for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 25-29 Oct.
Within the next week, solar activity is expected to be very low to low. Due to the effect of CME produced on 27 Oct, the geomagnetic field is expected to reach isolated active levels on 31 Oct. Due to the effect of the Solar Sector Boundary Crossing, the geomagnetic field is expected to reach isolated active levels on 2-3 Nov. The greater than 2 MeV electron flux at geosynchronous orbit is expected to maintained at minor storm levels on 30 Oct - 2 Nov.
	Published:	2020-10-30 00:56 UTC
	Forecaster:	029/026

During last week, solar activity was very low to low. There were four sunspot regions 2778-2781 on the visible disk. The area of region 2781 is relatively big which produced a series of C-class flares.The F10.7 index increased from around 80 sfu to 91 sfu. The maximum of solar wind speed was about 400 km/s. The geomagnetic field was quiet to unsettled. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 30-31 Oct.
During next week, solar activity is expected to be mainly at low levels. The active region 2781 has chances for producing M-class flares. The geomagnetic is expected to be quiet to unsettted.
	Published:	2020-11-06 03:14 UTC
	Forecaster:	021

During last week, solar activity was very low to low. There were three sunspot regions 2780-2782 on the visible disk. AR2781 and AR2782 produced a series of C-class flares.The F10.7 index decreased from around 94 sfu to 85 sfu. The maximum of solar wind speed was about 500 km/s. The geomagnetic field was quiet to unsettled.
Within next week, solar activity is expected to be mainly at low levels. Due to the effects of recurrent coronal hole high speed stream, the geomagnetic is expected to be mainly quiet to unsettted with isolated active levels on 18-19 Nov .
	Published:	2020-11-13 00:26 UTC
	Forecaster:	012

During last week, solar activity was very low without C-class and above flare produced. There were three sunspot regions on the visible disk, AR2781, AR2782 and AR2783. The F10.7 index ranged from 77 sfu to 82 sfu. The solar wind speed reached a peark of about 440 km/s. The geomagnetic field was quiet to unsettled.
Within next week, solar activity is expected to be mainly at low levels. Due to the effects of recurrent coronal hole high speed stream, the geomagnetic is expected to reach active levels with possibility of isolated minor storm levels on on 22-23 Nov and be quiet to unsettled for the rest of time.
	Published:	2020-11-20 03:56 UTC
	Forecaster:	010/025

During last week, solar activity was mainly at low levels with 13 C-class flares produced. There were four sunspot regions on the visible disk, AR2783-2786, in which region 2786 was large with 1000 sunspot unit areas and Beta-Gamma type. The F10.7 index increased from 82 sfu to 106 sfu. Due to the effects of recurrent coronal hole high speed stream, the solar wind speed reached a peak of about 630 km/s during 21-22 Nov, and the geomagnetic field was at minor storm levels for 3 hours and active levels for 18 hours. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 24 Nov.
Within next week, solar activity is expected to be mainly at low levels. The geomagnetic field is expected to be quiet to unsettled.
	Published:	2020-11-27 03:48 UTC
	Forecaster:	027/026

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.