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ARCHIVE

DAILY REPORTS

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During the past 24 hours, solar activity was very low. There was one active region on the visible disk. The solar wind speed increased to about 410 km/s. The geomagnetic field was quiet.
Within the next three days, solar activity is expected to be mainly at low levels. The geomagnetic field is expected to be active with isolated minor storm levels on 17-19 Aug due to the recurrent coronal hole high speed stream.
	Published:	2017-08-17 00:04 UTC
	Forecaster:	037/012

During the past 24 hours, solar activity was very low. There was one active region on the visible disk. The solar wind speed increased to about 580 km/s. The geomagnetic field readched minor storm levels for 9 hours and active levels for 6 hours.
Within the next three days, solar activity is expected to be mainly at low levels. The geomagnetic field is expected to be active with isolated minor storm levels on 18 Aug and quiet to unsettled with isolated active levels on 19-20 Aug due to the recurrent coronal hole high speed stream. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor storm levels on 19-20 Aug.
	Published:	2017-08-18 00:01 UTC
	Forecaster:	012/036

During the past 24 hours, solar activity was low and two C-class flares were produced. There was one active region on the visible disk. Due to the recurrent coronal hole high speed stream, the solar wind speed maintained at about 600 km/s, while the geomagnetic field readched minor storm levels for 3 hours and active levels for 6 hours.
Within the next three days, solar activity is expected to be mainly at low levels. The geomagnetic field is expected to reach isolated active levels on 19-20 Aug due to the recurrent coronal hole high speed stream, and be quiet to unsettled on 21 Aug. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor storm levels on the next three days.
	Published:	2017-08-19 00:08 UTC
	Forecaster:	036/022

During the past 24 hours, solar activity was low and nine C-class flares were produced. There was one active region on the visible disk, numbered AR2671(N12E08). Due to the persistent effects of the recurrent coronal hole high speed stream, the solar wind speed increased to about 750 km/s, and the geomagnetic field was at minor storm levels for 9 hours and active levels for 12 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 low to moderate with chances for M-class flares. The geomagnetic field is expected to reach isolated active levels on 20 Aug due to the recurrent coronal hole high speed stream, and be quiet to unsettled on 21-22 Aug. The greater than 2 MeV electron flux at geosynchronous orbit is expected to maintain at storm levels on the next three days.
	Published:	2017-08-20 00:12 UTC
	Forecaster:	022/035

During the past 24 hours, solar activity was moderate. There were two active regions on the visible disk, which produced a M1.1 flare and 4 C-class flares. Due to the persistent effects of the recurrent coronal hole high speed stream, the solar wind speed reached a peak of 800 km/s, and the geomagnetic field reached minor storm levels for 6 hours. The greater than 2 MeV electron flux at geosynchronous orbit was at minor storm levels.
Within the next three days, solar activity is expected to be moderate with a chance for M-class flares. The geomagnetic field is expected to reach isolated active levels on 21 Aug due to the recurrent coronal hole high speed stream. It will be quiet to unsettled on 22-23 Aug. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach moderate storm levels on the next three days.
	Published:	2017-08-21 00:10 UTC
	Forecaster:	035/026

During the past 24 hours, solar activity was low. There were two active regions on the visible disk, which produced 4 C-class flares. The solar wind speed decreased to about 570 km/s. The geomagnetic field was quiet to unsettled. The greater than 2 MeV electron flux at geosynchronous orbit was at moderate 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 be mainly quiet to unsettled. The greater than 2 MeV electron flux at geosynchronous orbit is expected to maintain at moderate storm levels on the next three days.
	Published:	2017-08-22 00:04 UTC
	Forecaster:	025/032

During the past 24 hours, solar activity was low. There were two active regions on the visible disk, which produced 3 C-class flares. The solar wind speed reached the maxmium of 680 km/s. The geomagnetic field reached moderate storm levels for 3 hours and minor storm levels for 3 hours, due to the south component of geomagnetic field. The greater than 2 MeV electron flux at geosynchronous orbit was at minor storm levels.
Within the next three days, solar activity is expected to be low with a little chance 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 is expected to maintain at storm levels on the next three days.
	Published:	2017-08-23 00:12 UTC
	Forecaster:	032/025

WEEKLY REPORTS

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During last week, solar activity was moderate on 9 Jul, low to very low for rest of the time. There were two active regions on the visible disk, AR 2665 and AR 2666, produced 12 C-class flares and one M-class flare. The F10.7 index ranged between 80 sfu and 95 sfu. Due to the effects of the coronal hole high speed stream, the solar wind reached the maxmium of 640 km/s, and the geomagnetic field was at minor storm levels for 6 hours and active levels for 12 hours on 9-10 Jul. It was quiet to unsettled levels for rest of the time.
Within the next week, solar activity is expected to be low to moderate, with a chance for M-class and above flares.The greater than 10 MeV proton flux will reach minor storm level on 14-15 Jul. The geomagnetic field is expected to reach active levels on 14-15 Jul due to the effect of a recurrent coronal hole high speed stream and will reach storm levels on 17 Jul due to the multiple CMEs.
	Published:	2017-07-14 03:06 UTC
	Forecaster:	025/032

During last week, solar activity was moderate on 14 Jul, low for rest of the time. There were three active regions on the visible disk, AR2665 ~ AR2667, produced 16 C-class flares and one M-class flare. The M2.4 flare was followed by a halo coronal mass ejection. Due to the influence of the flare, the greater than 10 MeV proton flux at geosynchronous orbit reached solar proton event levels in 5:00UTC on 14 Jul, with a peak value of 22 pfu. This event ended on 15 Jul. The F10.7 index decreased from 94 sfu to 70 sfu. Due to the effects of the CME, the solar wind reached the maxmium of 640 km/s, and the geomagnetic field was at moderate storm levels for 9 hours and minor storm levels for 9 hours and active levels for 15 hours on 16-17 Jul. It was quiet to unsettled levels for rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 17-20 Jul.
Within the next week, solar activity is expected to be low. The geomagnetic field is expected to reach active levels on 21-22 Jul due to the effect of a recurrent coronal hole high speed stream. The geomagnetic field is expected to be quiet to unsettled for rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit is expected to maintain at minor storm levels on 21 Jul.
	Published:	2017-07-21 01:20 UTC
	Forecaster:	012/037

During last week, solar activity was very low. There was only one active region on the visible disk, AR2668, without any C-class or above flares produced. The F10.7 index fluctuated between 68 sfu and 71 sfu. Due to the effects of the recurrent coronal hole high speed stream, the solar wind reached the maxmium of 785 km/s on 21 Jul, and the geomagnetic field was at minor storm levels for 3 hours and active levels for 15 hours on 21-26 Jul. It was quiet to unsettled levels for rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 23-27 Jul.
Within the next week, solar activity is expected to be low to moderate, with a chance for M-class and above flares. The geomagnetic field is expected to reach active to minor storm levels on 31 Jul - 1 Aug, due to the effect of a recurrent coronal hole high speed stream. The geomagnetic field is expected to be quiet to unsettled for rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit is expected to maintain at minor storm levels on 28-29 Jul.
	Published:	2017-07-28 01:52 UTC
	Forecaster:	032/026

During last week, solar activity was low on 1 Aug, very low for rest of the time. There were two active region on the visible disk, AR2669 and AR2670, produced 1 C-class flares. The F10.7 index fluctuated between 70 sfu and 75 sfu. Due to the effects of the recurrent coronal hole high speed stream, the solar wind increased to about 420 km/s on 3 Aug, and the geomagnetic field was at active levels for 9 hours. It was quiet to unsettled levels for rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit maintained at minor storm levels on 28-31 Jul.
Within the next week, solar activity is expected to be mainly low. Due to the effect of a recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated moderate storm level on 4-5 Aug, quiet to unsettled levels for rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor storm levels on 6-10 Aug.
	Published:	2017-08-04 01:52 UTC
	Forecaster:	038

During last week, solar activity was very low. There was one active region on the visible disk, AR2670, with no C-class and above flares produced. The F10.7 index decreased from 74 sfu to 71 sfu. Due to the effects of the recurrent coronal hole high speed stream, the solar wind increased to about 720 km/s and the geomagnetic field was at active levels for 28 hours on 4-6 Aug. It was at quiet to unsettled levels for rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit maintained at minor storm levels on 5-10 Aug.
Within the next week, solar activity is expected to be mainly very low. Due to the effect of a recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated minor storm levels on 11-14 Aug, quiet to unsettled levels for rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor storm levels on 11 Aug.
	Published:	2017-08-11 06:06 UTC
	Forecaster:	026

During last week, solar activity was very low. There was one active region on the visible disk, AR2670, with no C-class and above flares produced. The F10.7 index decreased from 74 sfu to 71 sfu. Due to the effects of the recurrent coronal hole high speed stream, the solar wind increased to about 720 km/s and the geomagnetic field was at active levels for 28 hours on 4-6 Aug. It was at quiet to unsettled levels for rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit maintained at minor storm levels on 5-10 Aug.
Within the next week, solar activity is expected to be mainly very low. Due to the effect of a recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated minor storm levels on 11-14 Aug, quiet to unsettled levels for rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor storm levels on 11 Aug.
	Published:	2017-08-11 06:06 UTC
	Forecaster:	026

During last week, solar activity was low on 14-15 Aug and very low on the rest of the time. There were two active regions on the visible disk, Region 2670 and 2671, and Region 2671 produced 7 C-class flares. The F10.7 index decreased from 70 sfu to 68 sfu and increased to 77 sfu. Due to the effects of the recurrent coronal hole high speed stream, the solar wind speed increased to about 620 km/s and the geomagnetic field was quiet to unsettled on 12-13 Aug. Due to the effects of another recurrent coronal hole high speed stream, the solar wind speed increased to about 580 km/s and the geomagnetic field reached minor storm levels for 9 hours and active levels for 6 hours on 17 Aug. It was at quiet to unsettled levels for rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit maintained at minor storm levels on 11 Aug.
Within the next week, solar activity is expected to be mainly low. The geomagnetic field is expected to be active with isolated minor storm levels on 18 Aug and quiet to unsettled with isolated active levels on 19-20 Aug due to the recurrent coronal hole high speed stream. It is expected to be at quiet to unsettled levels for rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor storm levels on 19-24 Aug.
	Published:	2017-08-18 01:32 UTC
	Forecaster:	012/036

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.