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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, without C-class and above flare produced. Due to the effect of the CME produced on 3 Jun, the solar wind speed inncreased to about 420 km/s. The geomagnetic field was at minor storm levels for 3 hours and active levels for 6 hours.
Within the next three days, solar activity is expected to be very low. Due to the continuous effect of the CME, the geomagnetic field is expected to reach active levels on 9 Jun and will be mainly quiet to unsettled on 10-11 Jun.
	Published:	2019-06-09 00:06 UTC
	Forecaster:	010/035

During the past 24 hours, solar activity was very low. There was no active region on the visible disk, without C-class and above flare produced. The solar wind speed reached a peak of about 460 km/s, and decreased to about 370 km/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 on 10 Jun. Due to the effect of a coronal hole high speed stream, it is expected to reach active levels on 11-12 Jun.
	Published:	2019-06-10 00:03 UTC
	Forecaster:	035/012

During the past 24 hours, solar activity was very low without C-class and above flare produced. There was no active region on the visible disk. The solar wind speed decreased to about 330 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 active levels on 11-12 Jun, and quiet to unsettled levels on 13 Jun.
	Published:	2019-06-11 00:02 UTC
	Forecaster:	012/029

During the past 24 hours, solar activity was very low without C-class and above flare produced. There was no active region on the visible disk. The solar wind speed decreased to about 305 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 active levels on 12 Jun, and quiet to unsettled levels for the rest of the time.
	Published:	2019-06-12 00:26 UTC
	Forecaster:	029/015

During the past 24 hours, solar activity was very low without C-class and above flare produced. There was no active region on the visible disk. The solar wind speed increased to about 400 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 active levels on 13 Jun, and quiet to unsettled levels for the rest of the time.
	Published:	2019-06-13 00:09 UTC
	Forecaster:	015/026

During the past 24 hours, solar activity was very low without C-class and above flare produced. There was no active region on the visible disk. Due to the effect of a coronal hole high speed stream, the solar wind speed increased 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 very low. The geomagnetic field will be mainly at quiet to unsettled levels.
	Published:	2019-06-13 23:58 UTC
	Forecaster:	026/021

During the past 24 hours, solar activity was very low without C-class and above flare produced. There was no active region on the visible disk. The solar wind decreased to about 420 km/s. The geomagnetic field was at quiet to unsettled levels.
Within the next three days, solar activity is expected to be very low. The geomagnetic field is expected to be mainly at quiet to unsettled levels with possibility for isolated active levels on 17 Jun due to the effect of a recurrent coronal hole high speed stream.
	Published:	2019-06-15 00:13 UTC
	Forecaster:	021/039

WEEKLY REPORTS

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During last week, solar activity was very low. There was no active region on the visible disk, without C-class and above flares produced. The F10.7 index ranged from 67 sfu to 69 sfu. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed reached a peak of 570 km/s on 1-2 May, and the geomagnetic field reached active level for 9hours, and was mainly quiet to unsettled for the rest time.
Within the next week, solar activity is expected to be very low. Due to the effect of a recurrent coronal hole high speed stream, the geomagnetic field is expected to reach active levels on 7-8 May. It will be mainly quiet to unsettled for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit will reach minor storm levels on 3-4 Mar.
	Published:	2019-05-03 00:54 UTC
	Forecaster:	015/029

During last week, solar activity was very low to low. There were two active regions (AR2740 and AR2741) on the visible disk. Region 2740 produced 12 C class flares produced, which associated a partial halo CME on 6 May. The F10.7 index ranged from 70 sfu to 79 sfu. The solar wind speed reached the peak of about 520 km/s on 4 May. The geomagnetic field was quiet to unsettled. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 3 May.
Within the next week, solar activity is expected to be low. Due to the effect of CME produced on 6 May, the geomagnetic field is expected to reach active levels on 11 May.
	Published:	2019-05-10 01:29 UTC
	Forecaster:	012/029

During last week, solar activity was very low to low. There were two active regions (AR2740 and AR2741) on the visible disk. Region 2741 produced several CMEs on 10-13 May and a C2-class flare on 15 May. The F10.7 index ranged from 74 sfu to 78 sfu. Due to the arrival of the coronal mass ejection, the solar wind speed maintained at 350 km/s and the maximum southward component of Bz reached -11 nT, and the geomagnetic field reached minor storm levels for 3 hours, and active level for 15 hours on 11 May. Due to the effect of CMEs produced on 10 and 11 May, the solar wind speed reached a peak of 570 km/s. The geomagnetic field was at major storm levels for 3 hours, moderate storm levels for 3 hours and active levels for 6 hours on 14 May. The geomagnetic field was quiet to unsettled at the rest time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 12 May and 13 May.
Within the next week, solar activity is expected to be very low to low. Due to the effect of CMEs produced on 12 May and 13 May, the geomagnetic field is expected to reach minor storm levels on 17 May. It will be quiet to unsettled on rest of the other time.
	Published:	2019-05-17 02:09 UTC
	Forecaster:	039/012

During last week, solar activity was very low. There was one active region (AR2741) on the visible disk, with no C class and above flare produced. The F10.7 index decreased from 72 sfu to 67 sfu. The solar wind speed decreased from about 460 km/s to 350 km/s. The geomagnetic field was quiet to unsettled.
Within the next week, solar activity is expected to be very low. Due to the effect of a recurrent coronal hole high speed stream, the geomagnetic field is expected to reach active levels on 28-29 May. It will be quiet to unsettled for the rest of time.
	Published:	2019-05-24 04:03 UTC
	Forecaster:	035/010

During last week, solar activity was very low. There was no active region on the visible disk, without C class and above flare produced. The F10.7 index ranged from 66 sfu to 69 sfu. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed reached the peak of 560 km/s on 29 May and the geomagnetic field was at active levels for 3 hours. It was quiet to unsettled for the rest time.
Within the next week, solar activity is expected to be very low. The geomagnetic field is expected to be mainly quiet to unsettled. The greater than 2 MeV electron flux at geosynchronous orbit will reach minor storm levels on 1-2 Jun.
	Published:	2019-05-31 04:07 UTC
	Forecaster:	010/039

During last week, solar activity was very low. There was no active region on the visible disk, without C class and above flare produced. The F10.7 index ranged from 69 sfu to 70 sfu. Due to the continuous effect of the recurrent coronal hole high speed stream, the solar wind speed reached the peak of 500 km/s on 31 May and the geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 31 May and 1-2 Jun.
Within the next week, solar activity is expected to be very low. The geomagnetic field is expected to be mainly at quiet to unsettled levels with possibility for isolated active levels on 8-9 Jun due to the effect of a recurrent coronal hole high speed stream.
	Published:	2019-06-07 05:50 UTC
	Forecaster:	039

During last week, solar activity was very low. There was no active region on the visible disk, without C class and above flare produced. The F10.7 index ranged from 68 sfu to 70 sfu. Due to the effects of the CME produced on 3 Jun and the recurrent coronal hole high speed stream, the solar wind speed reached a peak of 470 km/s and the southward component Bz of the interplanetary magnetic field reached a peak of -15 nT on 8-9 Jun. The geomagnetic field reached minor storm level for 3 hours and active levels for 6 hours on 8 Jun. Due to the effect of another recurrent coronal hole high speed stream, the solar wind speed reached a peak of 480 km/s ,and the geomagnetic field reached active levels for 3 hours on 13 Jun.
Within the next week, solar activity is expected to be very low. The geomagnetic field is expected to be mainly at quiet to unsettled levels with possibility for isolated active levels on 17-18 Jun due to the effect of a recurrent coronal hole high speed stream.
	Published:	2019-06-14 00:18 UTC
	Forecaster:	026/021

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.