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. Due to the effect of a coronal hole high speed stream, the solar wind speed increased to about 320 km/s. The geomagnetic field was quiet.
	Published:	2021-01-19 00:09 UTC
	Forecaster:	026/027

Within the next three days, solar activity is expected to be very low. The geomagnetic field is expected to reach isolated active levels with the continuous effect of a recurrent coronal hole high speed stream.
	Published:	2021-01-19 00:09 UTC
	Forecaster:	026/027

During last week, solar activity was very low. There were no sunspot regions on the visible disk, with no C-class and above flares produced. The F10.7 index ranged from 73 sfu to 75 sfu. Due to the effects of CME observed on 8 Jan, the solar wind speed reached a peak of about 480 km/s during 11-12 Jan, and the geomagnetic field reached active levels for 15 hours. It was mainly quiet during other periods.
	Published:	2021-01-15 01:19 UTC
	Forecaster:	035/012

Within 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 18-19 Jan. It will be quiet to unsettled during other periods.
	Published:	2021-01-15 01:19 UTC
	Forecaster:	035/012

ALERTS


	No space environment alerts have been issued today.


	13:40 UTC 29 Nov 2020	00:15 UTC 25 Nov 2020	13:00 UTC 22 Nov 2020	01:15 UTC 01 Nov 2020	01:15 UTC 31 Oct 2020

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:B1.5
	Peak Time:2021 Jan 19 08:44 UTC

	Updated:2021 Jan 19 13:47 UTC
	>>more data<<


	Current 5-min:6.130e-1 /cm².sr.s
	24-hr Max:6.847e-1 /cm².sr.s

	Updated:2021 Jan 19 13:40 UTC
	>>more data<<


	Speed:330.5 km/sec
	Density:12.9 protons/cm³

	Updated:2021 Jan 19 13:46 UTC
	>>more data<<


	Current:Kp=1
	24-hr Max:Kp=3

	Updated:2021 Jan 19 12:00 UTC
	>>more data<<


	Current 5-min:4.000e+0 /cm².sr.s
	Integral Flux:2.026e+6 /cm².sr.day

	Updated:2021 Jan 19 13:40 UTC
	>>more data<<


	10.7cm Flux:75 sfu

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


	SSN:13

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