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. Five active sunspot regions were on the visble disk without M-class and above flares produced. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed increased to about 700 km/s. The geomagnetic field reached minor storm levels for 3 hours. It was quiet to unsettled for the rest of the time.
	Published:	2025-12-14 00:30 UTC
	Forecaster:	015/016

Within the next three days, solar activity is expected to be low with chances for M-class flares. Due to the effect of the recurrent coronal hole high speed stream, the geomagnetic field will reach active level on 14 Dec and mainly quiet to unsettled for the rest of the time.
	Published:	2025-12-14 00:30 UTC
	Forecaster:	015/016

During the last week, solar activity was high on 6, 8-10 Dec, moderate on 7 Dec, and low for the rest of the time. Thirteen sunspot active regions (AR4294-AR4296, AR4298-AR4307) were on the visible disk with an X1.1 flare and eighteen M-class flares produced. The F10.7 index decreased from 206 sfu to 146 sfu. No solar proton event occurred. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed reached a peak value of about 700 km/s and the geomagnetic field was at active levels for 9 hours on 5-7 Dec. Due to the effect of CME, the solar wind speed reached a peak value of about 470 km/s and the geomagnetic field was at moderate storm levels for 6 hours, minor storm levles for 6 hours, and active levels for 3 hours on 10-11 Dec. The geomagnetic field was at quiet to unsettled levels for the rest of the time.
	Published:	2025-12-12 06:30 UTC
	Forecaster:	027/041

Within the next week, solar activity is expected to be low to moderate, with chances for M-class and above flares. The geomagnetic field will reach isolated active levels on 12 Dec due to the continuous effect of the CME, and reach active to minor storm levels on 13-15 Dec due to the effect of the recurrent coronal hole high speed stream. It will be quiet to unsettled for the rest of time.
	Published:	2025-12-12 06:30 UTC
	Forecaster:	027/041

ALERTS


	No space environment alerts have been issued today.


	01:00 UTC 13 Dec 2025	21:00 UTC 12 Dec 2025	19:00 UTC 12 Dec 2025	05:14 UTC 12 Dec 2025	19:00 UTC 11 Dec 2025

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:C8.6
	Peak Time:2025 Dec 13 10:51 UTC

	Updated:2025 Dec 14 01:29 UTC
	>>more data<<


	Current 5-min:1.899e-1 /cm².sr.s
	24-hr Max:2.616e-1 /cm².sr.s

	Updated:2025 Dec 14 01:20 UTC
	>>more data<<


	Speed:641.2 km/sec
	Density:1.1 protons/cm³

	Updated:2025 Dec 14 01:29 UTC
	>>more data<<


	Current:Kp=3
	24-hr Max:Kp=5

	Updated:2025 Dec 14 00:00 UTC
	>>more data<<


	Current 5-min:1.661e+2 /cm².sr.s
	Integral Flux:2.046e+7 /cm².sr.day

	Updated:2025 Dec 14 01:20 UTC
	>>more data<<


	10.7cm Flux:122 sfu

	Update:2025 Dec 13 UTC
	>>more data<<


	SSN:124

	Update:2025 Dec 12 UTC
	>>more data<<