Space Environment Prediction Center





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	RelativisticElectronEnhancement
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	AE Model
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	GEO relativistic electron flux
	Chinese Assimilation TEC Model

	Cosmic Ray
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	Coronal Hole Index
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	F10.7 Index
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OVERVIEW & FORECAST

Daily Review
Day 1 To 3
Weekly Review
Weekly Forecast

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.
	Published:	2017-08-21 00:10 UTC
	Forecaster:	035/026

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 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.
	Published:	2017-08-18 01:32 UTC
	Forecaster:	012/036

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

ALERTS


	Space environment alerts have been issued today.


	01:15 UTC 21 Aug 2017	03:00 UTC 20 Aug 2017	02:03 UTC 20 Aug 2017	01:15 UTC 20 Aug 2017	01:00 UTC 20 Aug 2017

LATEST DATA



		The active region magnetogram is created from the raw full-disk longitudinal magnetogram data observed at Huairou Solar Observatory Station of Beijing in China.				This full-disk Hα image of sun is observed with the 20cm Full-Disc Hα Telescope located at Huairou Solar Observatory Station of Beijing in China.

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		Observatories of cosmic ray in SEPC include Beijing station monitoring Neutron intensity variations and Guangzhou station monitoring the intensity variations of East, West, South, North and Vertical components of muon.				The Ionosphere GPS observation network , monitoring the ionospheric scintillation and GPS-TEC with time resolutions of 1 minute and 30 seconds, is located at Fuzhou, Xiamen, Guangzhou, Nanning and Hainan.

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	24-hr Max:C9.4
	Peak Time:2017 Aug 20 19:39 UTC

	Updated:2017 Aug 21 06:05 UTC
	>>more data<<


	Current 5-min:2.320e-1 /cm².sr.s
	24-hr Max:5.280e-1 /cm².sr.s

	Updated:2017 Aug 21 06:00 UTC
	>>more data<<


	Speed:673.2 km/sec
	Density:7.6 protons/cm³

	Updated:2017 Aug 21 06:00 UTC
	>>more data<<


	Current:Kp=3
	24-hr Max:Kp=5

	Updated:2017 Aug 21 03:00 UTC
	>>more data<<


	Current 5-min:1.030e+4 /cm².sr.s
	Integral Flux:8.234e+8 /cm².sr.day

	Updated:2017 Aug 21 06:00 UTC
	>>more data<<


	10.7cm Flux:86 sfu

	Update:2017 Aug 20 UTC
	>>more data<<


	SSN:44

	Update:2017 Aug 20 UTC
	>>more data<<