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. Seven active sunspot regions were on the visble disk without any M-class or above flares produced. The solar wind speed increased to about 460 km/s. The geomagnetic field was quiet to unsettled.
	Published:	2026-01-05 00:30 UTC
	Forecaster:	022/039

Within the next three days, solar activity is expected to be mainly low with chances for M-class flares. The geomagnetic field is expected to be quiet to unsettled.
	Published:	2026-01-05 00:30 UTC
	Forecaster:	022/039

During the last week, solar activity was high on 27, 31 Dec, moderate on 28-29 Dec and low for the rest of the time. Seventeen sunspot active regions (AR4312, AR4316-AR4317, AR4319-AR4332) were on the visible disk with six M-class flares produced. The F10.7 index fluctuated between 166 sfu and 195 sfu. No solar proton event occurred. Due to the effect of a recurrent coronal hole high speed stream, the solar wind speed reached the peak of about 540 km/s on 31 Dec. The geomagnetic field was at quiet to unsettled levels. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 26-30 Dec.
	Published:	2026-01-02 06:30 UTC
	Forecaster:	039/041

Within the next week, solar activity is expected to be low to moderate with chances for M-class flares. The geomagnetic field is expected to reach isolated active to storm levels due to effects of a recurrent coronal hole high speed stream and CMEs from 31 Dec and 1 Jan, and be mainly quiet to unsettled for the rest of the time.
	Published:	2026-01-02 06:30 UTC
	Forecaster:	039/041

ALERTS


	No space environment alerts have been issued today.


	22:00 UTC 02 Jan 2026	18:00 UTC 02 Jan 2026	14:11 UTC 31 Dec 2025	01:15 UTC 31 Dec 2025	01:15 UTC 30 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:C2.9
	Peak Time:2026 Jan 04 21:01 UTC

	Updated:2026 Jan 05 01:25 UTC
	>>more data<<


	Current 5-min:1.608e-1 /cm².sr.s
	24-hr Max:2.667e-1 /cm².sr.s

	Updated:2026 Jan 05 01:20 UTC
	>>more data<<


	Speed:487.7 km/sec
	Density:1.0 protons/cm³

	Updated:2026 Jan 05 01:20 UTC
	>>more data<<


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

	Updated:2026 Jan 05 00:00 UTC
	>>more data<<


	Current 5-min:3.887e+2 /cm².sr.s
	Integral Flux:4.146e+7 /cm².sr.day

	Updated:2026 Jan 05 01:20 UTC
	>>more data<<


	10.7cm Flux:157 sfu

	Update:2026 Jan 04 UTC
	>>more data<<


	SSN:136

	Update:2026 Jan 03 UTC
	>>more data<<