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ARCHIVE

DAILY REPORTS

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During the past 24 hours, solar activity was very low. There was no active region on the visible disk. As the arrival of a recurrent coronal hole high speed stream, the solar wind speed increased to about 360 km/s. The geomagnetic field was quiet to unsettled.
Within the next three days, solar activity is expected to be very low. Due to the persistent effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach storm levels.
	Published:	2017-10-11 00:17 UTC
	Forecaster:	022/035

During the past 24 hours, solar activity was very low. There was no active region on the visible disk. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed increased to about 520 km/s. The geomagnetic field reached minor storm levels for 6 hours and active levels for 15 hours.
Within the next three days, solar activity is expected to be very low. Due to the persistent effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach storm levels on 12-13 Oct. It will reach active levels on 14 Oct. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach storm levels on 14 Oct.
	Published:	2017-10-12 00:13 UTC
	Forecaster:	035/025

During the past 24 hours, solar activity was very low. There was no active region on the visible disk. The solar wind speed decreased to about 500 km/s. The geomagnetic field reached minor storm levels for 6 hours and active levels for 15 hours, due to the persistent effect of a recurrent coronal hole high speed stream.
Within the next three days, solar activity is expected to be very low. Due to the persistent effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach minor storm levels on 13 Oct. It will reach isolated active levels on 14-15 Oct. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach storm levels on 13-15 Oct.
	Published:	2017-10-13 00:09 UTC
	Forecaster:	025/032

During the past 24 hours, solar activity was very low. There was no active region on the visible disk. The solar wind speed increased to about 700 km/s. The geomagnetic field reached moderate storm levels for 6 hours, minor storm levels for 9 hours, and active levels for 3 hours, due to the persistent effect of a recurrent coronal hole high speed stream. 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 very low. Due to the persistent effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach minor storm levels on 14 Oct. It will reach isolated active levels on 15 Oct and return to quiet on 16 Oct. The greater than 2 MeV electron flux at geosynchronous orbit is expected to maintain at storm levels on 14-16 Oct.
	Published:	2017-10-14 00:09 UTC
	Forecaster:	032/021

During the past 24 hours, solar activity was very low. There was no active region on the visible disk. Due to the persistent effect of the recurrent coronal hole high speed stream, the solar wind speed maintained between 600 km/s and 700 km/s. The geomagnetic field minor storm levels for 9 hours, and active levels for 9 hours. 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 very low. Due to the persistent effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach active and above levels on 15 Oct and quiet to unsettled on 16-17 Oct. The greater than 2 MeV electron flux at geosynchronous orbit is expected to maintain at storm levels on 15-17 Oct.
	Published:	2017-10-15 00:07 UTC
	Forecaster:	026/029

During the past 24 hours, solar activity was very low. There was one active region on the visible disk. Due to the continous effect of the recurrent coronal hole high speed stream, the solar wind speed decreased to about 540 km/s. The geomagnetic field was at minor storm levels for 6 hours, and active levels for 9 hours. The greater than 2 MeV electron flux at geosynchronous orbit reached moderate storm levels.
Within the next three days, solar activity is expected to be very low. Due to the continous effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach active levels on 16 Oct. Due to the effect of another recurrent coronal hole high speed stream, the geomagnetic field is expected to reach active levels on 18 Oct. The greater than 2 MeV electron flux at geosynchronous orbit is expected to maintain at storm levels on 16-18 Oct.
	Published:	2017-10-16 00:06 UTC
	Forecaster:	029/027

During the past 24 hours, solar activity was very low. There was no active regions on the visible disk. The solar wind speed maintained at about 520 km/s. The geomagnetic field was quiet to unsettled. The greater than 2 MeV electron flux at geosynchronous orbit reached moderate storm levels.
Within the next three days, solar activity is expected to be very low. The geomagnetic field is expected to be quiet to unsettled on 17 Oct. Due to the effect of the coronal hole high speed stream, the geomagnetic field is expected to reach active levels on 18-19 Oct. The greater than 2 MeV electron flux at geosynchronous orbit is expected to maintain at storm levels.
	Published:	2017-10-17 00:02 UTC
	Forecaster:	027/010

WEEKLY REPORTS

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During last week, solar activity was low on 25 Aug, 27 Aug, 29-30 Aug and very low on the rest of the time. There were five active regions on the visible disk, Region 2671-2675, and nine C-class flares were produced. The F10.7 index ranged between 78 sfu and 92 sfu. The geomagnetic field was at active levels for 3 hours on 29 Aug. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed increased to about 600 km/s, while the geomagnetic field was at minor storm levels for 9 hours and active levels for 6 hours on 31 Aug.
Within the next week, solar activity is expected to be mainly low. Due to the effect of the recurrent coronal hole high speed stream and the CME on 28 Aug, the geomagnetic field is expected to reach minor storm levels on 1 Sep and active levels on 2 Sep. It will be quiet to unsettled for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit will be at minor storm levels on 2-7 Sep.
	Published:	2017-09-01 01:15 UTC
	Forecaster:	036/027

During last week, solar activity was high on 4-7 Sep and low on 1-3 Sep. There were 7 active regions on the visible disk, Region 2672-2678, and 3 X-class flares and 19 M-class flares were produced with the largest event of X9.3 flare. Region 2673 was the most active region with the bigest area of 1000 and complex magnetic configuration of Beta-Gamma-Delta. All X-class flares and M-class flares were produced by region 2673. Due to the M5.5 flare on 4 Sep which companied with a halo CME, the greater than 10 MeV proton flux at geosynchronous orbit reached solar proton event levels on 5 Sep 00:40 UT and finally reach the moderate solar proton event levels on 07:15 UT. The proton flux maintained at moderate solar proton event levels on 6-7 Sep with the peak value of 657 pfu.The X9.3 flare produced on 6 Sep was also companied with a halo CME. The F10.7 index increased from 93 sfu to 140 sfu, and decreased to 129 sfu. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed increased to about 700 km/s, and the geomagnetic field was at minor storm levels for 6 hours and active levels for 15 hours on 1-2 Sep. Due to the effect of another coronal hole high speed stream, the solar wind speed increased to about 600 km/s, and the geomagnetic field was at minor storm levels for 3 hours and active levels for 9 hours on 4-5 Sep. Due to the arrival of the halo CMEs on 4 Sep and 6 Sep, the solar wind speed increased to about 750 km/s with the maximum southward component of Bz of -32 nT, and the geomagnetic field was at major storm levels (Kp=8) for 3 hours and active levels for 12 hours on 6-7 Sep.The greater than 2 MeV electron flux at geosynchronous orbit maintained minor storm level on 2-6 Sep.
Within the next week, solar activity is expected to be moderate to high. Due to the arrival of the halo CMEs on 4 Sep and 6 Sep, the geomagnetic field is expected to reach major storm levels on 8-9 Sep and active to minor storm levels on 10 Sep. The greater than 2 MeV electron flux at geosynchronous orbit will be at storm levels on 10-14 Sep.
	Published:	2017-09-08 01:48 UTC
	Forecaster:	027/010

During last week, solar activity was high on 8, 10 Sep, moderate on 9 Sep, and low to very low during the rest days. There were 6 active regions on the visible disk, including Region 2673-2674, and Region 2677-2680. Region 2673 was the most active region with the bigest area of 1060 and complex magnetic configuration of Beta-Gamma-Delta, which produced an X8.2 flare with a halo CME and 8 M-class flares. The other regions were stable and quiet. The moderate solar proton event started at 00:40 on 5 Sep and ended at 00:05 on 9 Sep, during which the greater than 10 MeV proton flux at geosynchronous orbit reached a peak of 844 pfu at 00:35 on 8 Sep. Another major solar proton event was observed shortly after the X8.2 class flare produed by Region 2673 (S09W90). It started at 16:35 on 10 Sep and ended at 17:25 on 14 Sep, during which the greater than 10 MeV proton flux at geosynchronous orbit reached a peak of 1490 pfu at 11:40 on 11 Sep. The F10.7 index decreased from 117 sfu to 74 sfu. Due to the persistent effect of CMEs, the solar wind speed increased to about 850 km/s, and the geomagnetic field was at major storm levels for 9 hours, moderate storm levels for 3 hous, and minor storm levels for 9 hours on 8 Sep. Due to the effect of the halo CME on 10 Sep, the solar wind speed increased to about 650 km/s, and the geomagnetic field was at minor storm levels for 6 hours and active levels for 6 hours on 12-13 Sep. As the arrival of a recurrent coronal hole high speed stream, the solar wind speed increased to about 650 km/s on 14 Sep, and the geomagnetic field was at moderate storm levels for 3 hours, minor storm levels for 3 hours and active levels for 6 hours. The greater than 2 MeV electron flux at geosynchronous orbit maintained minor storm level on 9-12 Sep.
Within the next week, solar activity is expected to be low to very low. Due to the persistent effect of the coronal hole high speed stream, the geomagnetic field is expected to reach active to storm levels on 15-16 Sep. The greater than 2 MeV electron flux at geosynchronous orbit will be at storm levels on 17-20 Sep.
	Published:	2017-09-15 01:37 UTC
	Forecaster:	022/035

During last week, solar activity was very low. There were two active regions on the visible disk, Region 2680-2681, without C-class flares and above flares produced. The F10.7 index ranged between 71 sfu and 74 sfu. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed reached a peak of 770 km/s, while the geomagnetic field was at moderate storm levels for 6 hours, minor storm levels for 15 hours and active levels for 33 hours on 15-18 Sep. The greater than 2 MeV electron flux at geosynchronous orbit was at moderate storm levels on 19-21 Sep, and minor storm levels on 15-18 Aug and 22 Aug.
Within the next week, solar activity is expected to be very low. Due to the effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach minor storm levels on 27-28 Sep, and will be mainly quiet to unsettled for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit will be at minor storm levels on 22-24 Sep.
	Published:	2017-09-22 02:50 UTC
	Forecaster:	010/038

During last week, solar activity was very low to low. There were 4 active regions on the visible disk, Region 2680-2683. The F10.7 index increased from 78 sfu to 91 sfu. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed reached a peak of 740 km/s, while the geomagnetic field was at major storm levels for 6 hours, moderate storm levels for 9 hours, minor storm levels for 9 hours and active levels for 15 hours on 27-28 Sep. The greater than 2 MeV electron flux at geosynchronous orbit was at minor storm levels on 22 Sep and 24 Sep.
Within the next week, solar activity is expected to be very low to low. Due to persistent effect of the coronal hole high speed stream, the geomagnetic field is expected to reach minor storm levels on 29 Sep. Due to another coronal hole high speed stream, it is expected to reach storm levels on 1-2 Oct. It will be mainly quiet to unsettled for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit will be at storm levels on 29 Sep to 3 Oct.
	Published:	2017-09-29 01:46 UTC
	Forecaster:	035/025

During last week, solar activity was low on 5 Oct, and very low on the other days. There were three active regions on the visible disk, Region 2681-2683, and Region 2683 produced a C1 flare. The F10.7 index maintained between from 85 sfu to 90 sfu. The solar wind speed decreased from 600 km/s to 450 km/s. Due to the effect of a coronal hole high speed stream, the geomagnetic field was at active levels for 6 hours on 30 Sep, and active levels for 3 hours on 2 Oct. The greater than 2 MeV electron flux at geosynchronous orbit was at moderate storm levels on 29 Sep, 30 Sep, 2 Oct, and minor storm levels on 1 Oct, 3 Oct, 4 Oct.
Within the next week, solar activity is expected to be very low to low. Due to effect of a coronal hole high speed stream, the geomagnetic field is expected to reach minor or moderate storm levels on 11 Oct, 12 Oct. It will be mainly quiet to unsettled for the rest of time.
	Published:	2017-10-06 00:51 UTC
	Forecaster:	036/029

During last week, solar activity was very low to low. There were two active regions on the visible disk, Region 2682-2683, and the Region 2683 produced a C1 flare. The F10.7 index decreased from 84 sfu to 70 sfu. Due to the effect of a coronal hole high speed stream, the solar wind speed began to increas on 10 Oct and reached the maximum 590km/s, the geomagnetic field reached minor storms levels for 12 hours and active levels for 30 hours on 11-12 Oct.
Within the next week, solar activity is expected to be very low to low. Due to the persistent effect of coronal hole high speed stream, the geomagnetic field is expected to reach isolated minor storm levels on 13 Oct and active levels on 14-15 Oct. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach storm levels on 13-19 Oct.
	Published:	2017-10-13 01:02 UTC
	Forecaster:	025/032

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.