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 without C-class and above flare produced. There was no sunspot region on the visible disk. The solar wind speed decreased to about 350 km/s. The geomagnetic field was quiet.
	Published:	2021-05-05 22:39 UTC
	Forecaster:	026/027

Within the next three days, solar activity is expected to be very low. The geomagnetic field is expected to be mainly quiet.
	Published:	2021-05-05 22:39 UTC
	Forecaster:	026/027

During last week, solar activity was very low. There were six sunspot regions on the visible disk (AR2816-AR2821), without C-class and above flares produced. The F10.7 index fluctuated between 77 sfu to 80 sfu. Due to the effect of recurrent coronal hole high speed stream, the solar wind speed reached a peak of about 490 km/s and the geomagnetic field was at minor storm levels for 3 hours on 23 Apr. Due to the effect of CME on 22 Apr, the geomagnetic field was at minor storm levels for 3 hours and active levels for 3 hours on 25-26 Apr. The greater than 2 MeV electron flux at geosynchronous orbit will maintain at minor storm levels on 23-24 Apr.
	Published:	2021-04-30 03:22 UTC
	Forecaster:	012/029

Within next week, solar activity is expected to be very low. Due to the effects of coronal high speed stream and the CME produced on 26 Apr, the geomagnetic field is expected to reach isolated active levels on 30 Apr to 1 May. Due to the effects of coronal high speed stream , the geomagnetic field is expected to reach isolated active levels on 4-5 May.
	Published:	2021-04-30 03:22 UTC
	Forecaster:	012/029

ALERTS


	No space environment alerts have been issued today.


	04:00 UTC 26 Apr 2021	00:15 UTC 25 Apr 2021	01:00 UTC 25 Apr 2021	01:15 UTC 24 Apr 2021	22:00 UTC 23 Apr 2021

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:B3.4
	Peak Time:2021 May 06 08:01 UTC

	Updated:2021 May 06 09:39 UTC
	>>more data<<


	Current 5-min:5.080e-1 /cm².sr.s
	24-hr Max:7.030e-1 /cm².sr.s

	Updated:2021 May 06 09:30 UTC
	>>more data<<


	Speed:315.2 km/sec
	Density:8.7 protons/cm³

	Updated:2021 May 06 09:42 UTC
	>>more data<<


	Current:Kp=1
	24-hr Max:Kp=1

	Updated:2021 May 06 09:00 UTC
	>>more data<<


	Current 5-min:4.000e+0 /cm².sr.s
	Integral Flux:5.317e+6 /cm².sr.day

	Updated:2021 May 06 09:30 UTC
	>>more data<<


	10.7cm Flux:70 sfu

	Update:2021 May 05 UTC
	>>more data<<


	SSN:0

	Update:2021 May 05 UTC
	>>more data<<