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 low. Eight active sunspot regions were on the visible disk without any M-class or above flares produced. The solar wind speed slowly decreased to about 360 km/s. The geomagnetic field was quiet to unsettled.
	Published:	2026-08-16 00:30 UTC
	Forecaster:	022/027

Within the next three days, solar activity is expected to be mainly low with a slight chance for M-class flares. The geomagnetic field is expected to be quiet to unsettled on 16 Aug. It will reach active to storm levels on 17-18 Aug due to the effects of the CME produced on 14 Aug.
	Published:	2026-08-16 00:30 UTC
	Forecaster:	022/027

During the last week, solar activity was very low on 7-8, 13 Aug and low for the rest of time. Twelve sunspot active regions (AR4498, AR4510, AR4502-AR4511) were on the visible disk without M-class or above flare produced. No SEP event occurred. The F10.7 index fluctuate between 94 sfu and 108 sfu. Due to the effect of recurrent coronal hole high speed stream, the solar wind speed reached a peak of about 480 km/s and the geomagnetic field reached moderate storm levels for 3 hours, minor storm levels for 3 hours and active levels for 9 hours on 8-9 Aug. It was quiet to unsettled for the rest of the time.
	Published:	2026-08-14 06:30 UTC
	Forecaster:	039/015

Within the next week, solar activity is expected to be mainly low with slight chances for M-class flares. The geomagnetic field is expected to be mainly quiet to unsettled with isolated active levels on 14-15 Aug due to the effect of a coronal hole high speed stream.
	Published:	2026-08-14 06:30 UTC
	Forecaster:	039/015

ALERTS


	No space environment alerts have been issued today.


	19:00 UTC 08 Aug 2026	12:00 UTC 08 Aug 2026	16:00 UTC 02 Aug 2026	19:35 UTC 30 Jul 2026	02:48 UTC 27 Jul 2026

LATEST DATA



		The magnetic map of the activity area is generated based on the full day longitudinal magnetic field data of the Huairou Solar Observatory in Beijing.				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.



		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.				This model is an improved geomagnetic K-index current reporting model based on the evaluation of Takahashi, a commonly used international Kp index current reporting model, and its application to Chinese geomagnetic stations.

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	24-hr Max:C3.8
	Peak Time:2026 Aug 16 03:18 UTC

	Updated:2026 Aug 16 18:11 UTC
	>>more data<<


	Current 5-min:2.059e-1 /cm².sr.s
	24-hr Max:3.576e-1 /cm².sr.s

	Updated:2026 Aug 16 18:05 UTC
	>>more data<<


	Speed:303.97 km/sec
	Density:1.6 protons/cm³

	Updated:2026 Aug 16 18:09 UTC
	>>more data<<


	Current:Kp=0
	24-hr Max:Kp=3

	Updated:2026 Aug 16 15:00 UTC
	>>more data<<


	Current 5-min:1.210e+2 /cm².sr.s
	Integral Flux:1.580e+7 /cm².sr.day

	Updated:2026 Aug 16 18:05 UTC
	>>more data<<


	10.7cm Flux:117 sfu

	Update:2026 Aug 15 UTC
	>>more data<<


	SSN:111

	Update:2026 Aug 15 UTC
	>>more data<<