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 M-class and above flare produced. The solar wind speed decreased to about 460 km/s. Due to the effects of coronal hole high speed streams, the geomagnetic field was quiet to unsetteld. The greater than 2 MeV electron flux at geosynchronous orbit maintained at minor storm levels.
	Published:	2025-10-06 00:30 UTC
	Forecaster:	040

Within the next three days, solar activity is expected to be low to moderate with a chance for M-class and above flares. The geomagnetic field is expected to reach isolated active to minor storm levels due to the effects of CME on 3 Oct. The greater than 2 MeV electron flux at geosynchronous orbit will maintain at minor storm levels on 6 Oct.
	Published:	2025-10-06 00:30 UTC
	Forecaster:	040

During the last week, solar activity was high on 28 Sep and moderate on 26-27 Sep and 29 Sep to 2 Oct. Neneteen active sunspot regions (AR4217, AR4224-4241) were on the visible disk with 15 M-class flares produced. No solar proton event occurred. The F10.7 index varied between 164 sfu and 187 sfu. Due to the effects of a recurrent coronal hole high speed stream and geomagnetism during the autumn equinoxe, the solar wind speed reached a peak value of 750 km/s during 29 Sep to 2 Oct, and the geomagnetic field reached major storm levels for 6 hours, moderate storm levels for 15 hours, minor storm levels for 42 hours and active levels for 18 hours. 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 2 Oct.
	Published:	2025-10-03 06:30 UTC
	Forecaster:	012

Within the next week, solar activity is expected to be mainly moderate with a chance for M-class and above flares. The geomagnetic field is expected to reach active or minor storm levels 3-7 Oct due to the continuous effects of coronal hole high speed streams and geomagnetism during the autumn equinoxe. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor storm levels on 3-5 Oct.
	Published:	2025-10-03 06:30 UTC
	Forecaster:	012

ALERTS


	Space environment alerts have been issued today.


	01:15 UTC 06 Oct 2025	00:15 UTC 05 Oct 2025	01:15 UTC 04 Oct 2025	15:52 UTC 03 Oct 2025	07:00 UTC 03 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:C4.3
	Peak Time:2025 Oct 06 01:10 UTC

	Updated:2025 Oct 06 20:10 UTC
	>>more data<<


	Current 5-min:3.208e-1 /cm².sr.s
	24-hr Max:7.078e-1 /cm².sr.s

	Updated:2025 Oct 06 20:05 UTC
	>>more data<<


	Speed:423.7 km/sec
	Density:2.2 protons/cm³

	Updated:2025 Oct 06 20:10 UTC
	>>more data<<


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

	Updated:2025 Oct 06 18:00 UTC
	>>more data<<


	Current 5-min:1.045e+4 /cm².sr.s
	Integral Flux:1.126e+9 /cm².sr.day

	Updated:2025 Oct 06 20:05 UTC
	>>more data<<


	10.7cm Flux:148 sfu

	Update:2025 Oct 05 UTC
	>>more data<<


	SSN:127

	Update:2025 Oct 05 UTC
	>>more data<<