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. One active sunspot regions were on the visible disk without any M-class or above flares produced. The solar wind speed decreased to about 360 km/s. The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit reached at minor storm level.
	Published:	2026-10-25 00:30 UTC
	Forecaster:	015/039

Within the next three days, solar activity is expected to be mainly low with a little chance for M-class flare. The geomagnetic field is expected to be mainly at quiet to unsettled levels with isolated active levels on 25 Oct due to the effect of the CME from 21 Oct.
	Published:	2026-10-25 00:30 UTC
	Forecaster:	015/039

During the last week, solar activity was moderate on 16 Oct and 19 Oct, low for the rest of time. Five active sunspot regions (AR4551, AR4555, AR4557, AR4559-AR4560) were on the visible disk with 2 M-class flares produced. No Solar Proton Event occurred. The F10.7 index fluctuated between 106 sfu and 137 sfu. The geomagnetic field reached active levels for 3 hours. Due to the effects of the recurrent coronal hole high speed stream, the solar wind speed reached a peak of about 520 km/s and the geomagnetic field reached minor storm levels for 3 hours and active levels for 21 hours on 21-22 Oct. It was quiet to unsettled for the rest of time.
	Published:	2026-10-23 06:30 UTC
	Forecaster:	012/040

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 active or minor storm levels on 24-25 Oct due to the effect of the coronal hole high speed stream. It will be quiet to unsettled for the rest of time.
	Published:	2026-10-23 06:30 UTC
	Forecaster:	012/040

ALERTS


	Space environment alerts have been issued today.


	01:15 UTC 25 Oct 2026	21:00 UTC 21 Oct 2026	09:16 UTC 19 Oct 2026	15:45 UTC 16 Oct 2026	22:00 UTC 10 Oct 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:C1.5
	Peak Time:2026 Oct 25 19:42 UTC

	Updated:2026 Oct 25 23:44 UTC
	>>more data<<


	Current 5-min:2.558e-1 /cm².sr.s
	24-hr Max:4.325e-1 /cm².sr.s

	Updated:2026 Oct 25 23:35 UTC
	>>more data<<


	Speed:346.28 km/sec
	Density:11.9 protons/cm³

	Updated:2026 Oct 25 23:41 UTC
	>>more data<<


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

	Updated:2026 Oct 25 21:00 UTC
	>>more data<<


	Current 5-min:1.566e+3 /cm².sr.s
	Integral Flux:1.120e+8 /cm².sr.day

	Updated:2026 Oct 25 23:35 UTC
	>>more data<<


	10.7cm Flux:89 sfu

	Update:2026 Oct 25 UTC
	>>more data<<


	SSN:25

	Update:2026 Oct 24 UTC
	>>more data<<