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 high. Eight active sunspot regions were on the visble disk with an X1.9 flare produced. The greater than 10 MeV proton flux at geosynchronous orbit reached the threshold of minor solar proton event levels at 22:55 UTC, and the peak value of flux was 36 pfu. The solar wind speed decreased to about 470 km/s. The geomagnetic field reached active levels for 6 hours and quiet to unsettled levels for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit maintained at minor storm levels.
	Published:	2026-01-19 00:30 UTC
	Forecaster:	016/042

Within the next three days, solar activity is expected to be mainly moderate with chances for M-class and above flares. The greater than 10 MeV proton flux at geosynchronous orbit will maintain at minor solar proton event levels on 19 Jan. Due to the effects of CME on 18 Jan and the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach major storm levels on 19-20 Jan and minor storm levels on 21 Jan. The greater than 2 MeV electron flux at geosynchronous orbit will maintain at minor storm levels on 19 Jan.
	Published:	2026-01-19 00:30 UTC
	Forecaster:	016/042

During the last week, solar activity was moderate on 11 and 14 Jan, low for the rest of the time. 12 sunspot active regions (AR4333-AR4334, AR4336-AR4337, AR4339-AR4346) were on the visible disk with 2 M-class flares produced. The F10.7 index ranged between 111 sfu and 139 sfu. No solar proton event occurred. Due to the effects of a CME from 8 Jan and recurrent coronal hole high speed stream, the solar wind speed reached a peak of about 620 km/s and the geomagnetic field was at moderate storm levels for 6 hours, minor storm active levels for 12 hours and active levels for 24 hours on 9-13 Jan. The geomagnetic field was at quiet to unsettled levels for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 13-15 Jan.
	Published:	2026-01-16 06:30 UTC
	Forecaster:	039/026

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 on 17-20 Jan due to the effect of the recurrent coronal hole high speed stream. It will be mainly quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit will remain at minor storm level on 16, 20-22 Jan.
	Published:	2026-01-16 06:30 UTC
	Forecaster:	039/026

ALERTS


	Space environment alerts have been issued today.


	01:15 UTC 19 Jan 2026	04:40 UTC 19 Jan 2026	18:50 UTC 18 Jan 2026	23:56 UTC 17 Jan 2026	10:32 UTC 17 Jan 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:X1.9
	Peak Time:2026 Jan 18 18:09 UTC

	Updated:2026 Jan 19 04:52 UTC
	>>more data<<


	Current 5-min:1.093e+2 /cm².sr.s
	24-hr Max:1.093e+2 /cm².sr.s

	Updated:2026 Jan 19 04:45 UTC
	>>more data<<


	Speed:439.1 km/sec
	Density:2.9 protons/cm³

	Updated:2026 Jan 19 05:02 UTC
	>>more data<<


	Current:Kp=3
	24-hr Max:Kp=4

	Updated:2026 Jan 19 03:00 UTC
	>>more data<<


	Current 5-min:0.000e+0 /cm².sr.s
	Integral Flux:1.674e+8 /cm².sr.day

	Updated:2026 Jan 19 04:45 UTC
	>>more data<<


	10.7cm Flux:148 sfu

	Update:2026 Jan 18 UTC
	>>more data<<


	SSN:140

	Update:2026 Jan 18 UTC
	>>more data<<