Space Environment Prediction Center





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	Coronal Hole 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 very low without C-class and above flare produced. There was one sunspot region on the visible disk. The solar wind speed decreased to about 440 km/s. The geomagnetic field was at quiet levels. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels.
	Published:	2021-06-19 22:26 UTC
	Forecaster:	040/010

Within the next three days, solar activity is expected to be very low. The geomagnetic field is expected to be mainly quiet. The greater than 2 MeV electron flux at geosynchronous orbit is expected to mantain minor storm levels on 20 Jun.
	Published:	2021-06-19 22:26 UTC
	Forecaster:	040/010

During last week, solar activity was very low. There were 2 sunspot regions (AR2832-AR2833) on the visible disk. There were no C-class and above flares produced. The F10.7 index fluctuated between 69 sfu to 78 sfu. The geomagnetic field was at active levels for 3 hours on 12 Jun. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed reached a peak of about 620 km/s and the geomagnetic field was at minor storm level for 3 hours and active levels for 6 hours on 15-16 Jun. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 17 Jun.
	Published:	2021-06-18 03:03 UTC
	Forecaster:	027/039

Within next week, solar activity is expected to be mainly very low. The geomagnetic field is expected to be quiet to unsettled. The greater than 2 MeV electron flux at geosynchronous orbit will maintain at minor storm levels on 18-19 Jun.
	Published:	2021-06-18 03:03 UTC
	Forecaster:	027/039

ALERTS


	Space environment alerts have been issued today.


	01:15 UTC 19 Jun 2021	00:15 UTC 18 Jun 2021	19:00 UTC 15 Jun 2021	03:00 UTC 29 May 2021	19:00 UTC 26 May 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:A6.3
	Peak Time:2021 Jun 19 19:29 UTC

	Updated:2021 Jun 20 00:36 UTC
	>>more data<<


	Current 5-min:5.337e-1 /cm².sr.s
	24-hr Max:7.154e-1 /cm².sr.s

	Updated:2021 Jun 20 00:30 UTC
	>>more data<<


	Speed:422.7 km/sec
	Density:4.1 protons/cm³

	Updated:2021 Jun 20 00:36 UTC
	>>more data<<


	Current:Kp=1
	24-hr Max:Kp=2

	Updated:2021 Jun 20 00:00 UTC
	>>more data<<


	Current 5-min:2.379e+3 /cm².sr.s
	Integral Flux:2.002e+8 /cm².sr.day

	Updated:2021 Jun 20 00:30 UTC
	>>more data<<


	10.7cm Flux:77 sfu

	Update:2021 Jun 18 UTC
	>>more data<<


	SSN:24

	Update:2021 Jun 18 UTC
	>>more data<<