Space Environment Prediction Center





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OVERVIEW & FORECAST

Daily Review
Day 1 To 3
Weekly Review
Weekly Forecast

During the past 24 hours, solar activity was very low. There was one active region on the visible disk, with no C-class and above flare produced. The solar wind speed decreased to about 300 km/s. The geomagnetic field was quiet.
	Published:	2018-05-22 00:01 UTC
	Forecaster:	035/012

Within the next three days, solar activity is expected to be very low. Due to the effect of recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated acitve levels on 22-23 May. It will be mainly quiet to unsettled on 24 May.
	Published:	2018-05-22 00:01 UTC
	Forecaster:	035/012

During last week, solar activity was very low. There was one active region 2709 on the visible disk, and no C-class and above flare produced. The F10.7 index fluctuated from 69 sfu to 71 sfu. Due to the continuous effects of the recurrent coronal hole high speed stream, the geomagnetic field was at active levels for 15 hours, and quiet to unsettled levels on the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit reached moderate levels on 11 May and minor storm levels on 12-17 May.
	Published:	2018-05-18 00:55 UTC
	Forecaster:	021/029

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 be at isolated active levels on 18 May. Active levels are also expected on 23-24 May with the effect of another recurrent coronal hole high speed stream. Quiet to unsettled levels are expected on the rest of time.
	Published:	2018-05-18 00:55 UTC
	Forecaster:	021/029

ALERTS


	No space environment alerts have been issued today.


	01:15 UTC 18 May 2018	00:15 UTC 17 May 2018	01:15 UTC 16 May 2018	01:15 UTC 15 May 2018	01:15 UTC 14 May 2018

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:B2.8
	Peak Time:2018 May 22 05:07 UTC

	Updated:2018 May 22 13:44 UTC
	>>more data<<


	Current 5-min:3.030e-1 /cm².sr.s
	24-hr Max:4.670e-1 /cm².sr.s

	Updated:2018 May 22 13:35 UTC
	>>more data<<


	Speed:314.7 km/sec
	Density:18.6 protons/cm³

	Updated:2018 May 22 13:46 UTC
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	Current:Kp=1
	24-hr Max:Kp=2

	Updated:2018 May 22 12:00 UTC
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	Current 5-min:1.700e+2 /cm².sr.s
	Integral Flux:3.694e+7 /cm².sr.day

	Updated:2018 May 22 13:35 UTC
	>>more data<<


	10.7cm Flux:70 sfu

	Update:2018 May 21 UTC
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	SSN:12

	Update:2018 May 21 UTC
	>>more data<<