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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. Nine sunspot active regions were on the visble disk without M-class or above flare produced. The solar wind speed decreased to about 480 km/s. The geomagnetic field was at quite to unsettled levels.
	Published:	2025-10-22 00:30 UTC
	Forecaster:	042/012

Within the next three days, solar activity is expected to be low to moderate with a chance for M-class flares. The geomagnetic field is expected to be mainly quiet to unsettled.
	Published:	2025-10-22 00:30 UTC
	Forecaster:	042/012

During the last week, solar activity was high on 15 Oct, moderate on 13-14 Oct and 16 Oct and low for the rest of the time. Fourteen active sunspot regions (AR4241, AR4245-4256) were on the visible disk with 15 M-class flares produced. No solar proton event occurred. The F10.7 index increased from 121 sfu to 161 sfu. Due to the effects of the recurrent coronal hole high speed stream, the solar wind speed reached a peak value of 810 km/s during 11-13 Oct, and the geomagnetic field reached minor storm levels for 12 hours and active levels for 30 hours. The geomagnetic field reached active levels for 3 hours respectively on 10, 15 Oct. The geomagnetic field was at quiet to unsettled levels for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 13-16 Oct.
	Published:	2025-10-17 06:30 UTC
	Forecaster:	039

Within the next week, solar activity is expected to be mainly moderate with a chance for M-class flares. The geomagnetic field is expected to reach storm levels on 17-18 Oct due to the effect of the CME from 13 Oct.The geomagnetic field is expected to reach storm levels on 19-20 Oct due to the effect of the recurrent coronal hole high speed stream. It will be quiet to unsettled for the rest of the time.
	Published:	2025-10-17 06:30 UTC
	Forecaster:	039

ALERTS


	No space environment alerts have been issued today.


	05:37 UTC 20 Oct 2025	19:26 UTC 19 Oct 2025	02:02 UTC 19 Oct 2025	01:00 UTC 19 Oct 2025	19:00 UTC 18 Oct 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:C4.4
	Peak Time:2025 Oct 22 00:34 UTC

	Updated:2025 Oct 22 00:57 UTC
	>>more data<<


	Current 5-min:1.948e-1 /cm².sr.s
	24-hr Max:2.975e-1 /cm².sr.s

	Updated:2025 Oct 22 00:50 UTC
	>>more data<<


	Speed:456.3 km/sec
	Density:1.8 protons/cm³

	Updated:2025 Oct 22 00:55 UTC
	>>more data<<


	Current:Kp=2
	24-hr Max:Kp=3

	Updated:2025 Oct 22 00:00 UTC
	>>more data<<


	Current 5-min:1.516e+2 /cm².sr.s
	Integral Flux:1.471e+7 /cm².sr.day

	Updated:2025 Oct 22 00:50 UTC
	>>more data<<


	10.7cm Flux:133 sfu

	Update:2025 Oct 21 UTC
	>>more data<<


	SSN:109

	Update:2025 Oct 20 UTC
	>>more data<<