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ARCHIVE

DAILY REPORTS

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During the past 24 hours, solar activity was very low with no C-class and above flares produced. There were two active regions on the visible disk. The solar wind speed decreased slowly to about 450 km/s. The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm level.
Within the next three days, solar activity is expected to be very low. The geomagnetic field is expected to be quiet. The greater than 2 MeV electron flux at geosynchronous orbit will reach minor storm levels.
	Published:	2017-06-19 23:06 UTC
	Forecaster:	026/032

During the past 24 hours, solar activity was very low with no C-class and above flares produced. There were three active regions on the visible disk. The solar wind speed decreased slowly to about 340 km/s. The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm level.
Within the next three days, solar activity is expected to be very low. The geomagnetic field is expected to reach isolated active levels on 23 Jun due to the effect of a coronal hole high speed stream, and unsettled to quiet levels on the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit will reach minor storm levels on 21-22 Jun.
	Published:	2017-06-20 23:18 UTC
	Forecaster:	029/027

During the past 24 hours, solar activity was very low with no C-class and above flares produced. There were three active regions on the visible disk. The solar wind speed maintained at about 340 km/s. The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm level.
Within the next three days, solar activity is expected to be very low. The geomagnetic field is expected to reach isolated active levels on 23-24 Jun due to the effect of a coronal hole high speed stream, and quiet to unsettled levels on the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit will reach minor storm levels on 22 Jun.
	Published:	2017-06-21 23:02 UTC
	Forecaster:	027/026

During the past 24 hours, solar activity was very low without C-class and above flares produced. There were two active regions on the visible disk. The solar wind speed maintained at about 340 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 effect of a coronal hole high speed stream, the geomagnetic field is expected to reach isolated active levels on 23-24 Jun , and quiet to unsettled levels for the rest of time.
	Published:	2017-06-22 23:45 UTC
	Forecaster:	010/038

During the past 24 hours, solar activity was very low without C-class and above flares produced. There were two active regions on the visible disk. The solar wind speed increased to about 370 km/s. The geomagnetic field was quiet.
Within the next three days, solar activity is expected to be very low. Due to the effect of a coronal hole high speed stream, the geomagnetic field is expected to reach isolated active levels on 24 Jun , and quiet to unsettled levels for the rest of time.
	Published:	2017-06-24 00:09 UTC
	Forecaster:	038/012

During the past 24 hours, solar activity was very low with no C-class and above flares produced. There were two active regions on the visible disk. The solar wind speed maintained at about 400km/s. The geomagnetic field was quiet to unsettled.
Within the next three days, solar activity is expected to be very low. The geomagnetic field is expected to be quiet to unsettled.
	Published:	2017-06-25 00:11 UTC
	Forecaster:	025/037

During the past 24 hours, solar activity was very low with no C-class and above flares produced. There was one active region on the visible disk. The solar wind speed increased to about 510km/s. The geomagnetic field was active for 3 hours, and quiet to unsettled during other periods of time.
Within the next three days, solar activity is expected to be very low. The geomagnetic field is expected to be quiet to unsettled.
	Published:	2017-06-26 00:06 UTC
	Forecaster:	037/022

WEEKLY REPORTS

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During last week, solar activity was very low. There were 2 active ragions on the disk: AR2654-AR2655, with no C and above class flare produced. The F10.7 index decreased from 74 sfu to 69 sfu. The solar wind speed maintained at about 400 km/s. The geomagnetic field was quiet to unsettled.
Within the next week, solar activity is expected to be mainly 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 15-17 May.
	Published:	2017-05-12 02:55 UTC
	Forecaster:	027/026

During last week, solar activity was very low. There were 3 active regions on the visible disk (Region 2656-2658). The F10.7 index increased slightly from 69 sfu to 72 sfu. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed began to increase on 15 May, and reached a peak of 650 km/s on 16 May. The geomagnetic field was at avtive levels for 6 hours on 15 May, avtive levels for 3 hours on 18 May, and quiet to unsettled levels at other times.
Within the next week, solar activity is expected to be very low. The geomagnetic field is expected to reach strom levels on 19-21 May due to the effect of a recurrent coronal hole high speed stream and will be quiet to unsettled on other periods.The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor or moderate storm levels on 21-25 May.
	Published:	2017-05-19 05:04 UTC
	Forecaster:	021/036

During last week, solar activity was very low. There were 4 active regions on the visible disk (Region 2656, Region 2658-2660). The F10.7 index increased slowly from 72 sfu to 78 sfu. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed began to increase on 19 May, and reached a peak of 745 km/s on 20 May. The geomagnetic field was at active levels for 18 hours on 20 May, and quiet to unsettled levels at other times. The greater than 2 MeV electron flux at geosynchronous orbit reached at minor storm levels on 21-25 May.
Within the next week, solar activity is expected to be very low. The geomagnetic field is expected to reach active levels on 26-27 May due to the effect of a CME produced on 23 May and will be quiet to unsettled on other periods. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor storm levels on 26 May.
	Published:	2017-05-26 02:00 UTC
	Forecaster:	029/027

During last week, solar activity was low on 28 May, 31 May, 1 Jun, and very low for the rest of the time. There were 2 active regions on the visible disk (Region 2659, Region 2661). The F10.7 index maintained between 74 sfu and 82 sfu. Due to the arrival of the coronal mass ejection erupted on 23 May, the maximum southward component of Bz reached -20 nT and the geomagnetic field was at major storm levels for 3 hours, moderate storm levels for 9 hours, minor storm levels for 3 hours and active levels for 3 hours during 27 May-28 May. Due to the effect of a coronal hole high speed stream, the solar wind speed reached a peak of 560km/s and the geomagnetic field was at active levels for 6 hours on 29 May-30 May.
Within the next week, solar activity is expected to be low. The geomagnetic field is expected to reach isolated active or minor storm levels on 2 Jun, 3 Jun due to the effect of a coronal hole high speed stream, and quiet to unsettled levels on the other days.
	Published:	2017-06-02 01:08 UTC
	Forecaster:	036/022

During last week, solar activity was low on 2-3 Jun, 5 Jun and 7 Jun, and very low for the rest of the time. There was only 1 active region on the visible disk, Region 2661 which produced 10 C-class flares. The F10.7 index ranged between 74 sfu and 79 sfu. Due to the effects of the coronal hole high speed stream, the solar wind increased to 480 km/s, and the geomagnetic field was at active levels for 3 hours on 3 Jun. It was quiet at the other time.
Within the next week, solar activity is expected to be very low. The geomagnetic field is expected to reach active or minor storm levels on 12-13 Jun due to the effects of the coronal hole high speed stream. Due to the effects of another recurrent coronal hole high speed stream, it will reach minor storm levels on 15 Jun.
	Published:	2017-06-09 01:09 UTC
	Forecaster:	027/026

During last week, solar activity was very low. There were two active regions on the visible disk, numbered AR2662 and AR2663. The F10.7 index flutuated between 74 sfu and 77 sfu. Due to the effects of a coronal hole high speed stream, the solar wind reached a peak of 540 km/s on 12 Jun, and the geomagnetic field was at minor storm levels for 3 hours, active levels for 3 hours on 11 Jun, and quiet to unsettled levels for the time.
Within the next week, solar activity is expected to be very low. The geomagnetic field is expected to reach active to minor storm levels on 16-17 Jun due to the effects of the other coronal hole high speed streams, and quiet to unsettled levels on 18-22 Jun. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor storm levels on 18-22 Jun.
	Published:	2017-06-16 02:25 UTC
	Forecaster:	022/032

During last week, solar activity was very low. There were three active regions on the visible disk, numbered AR2662 - AR2664. The F10.7 index flutuated between 74 sfu and 75 sfu. Due to the effects of a coronal hole high speed stream, the solar wind reached a peak of 630 km/s on 16 Jun, and the geomagnetic field was at minor storm levels for 6 hours, active levels for 15 hours on 16-17 Jun, and quiet to unsettled levels for the time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 19-21 Jun.
Within the next week, solar activity is expected to be very low. Due to the effects of the two coronal hole high speed streams, the geomagnetic field is expected to reach active levels on 23-24 Jun, and be quiet to unsettled for other time.
	Published:	2017-06-23 04:22 UTC
	Forecaster:	010/038

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.