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. Two active sunspot regions were on the visble disk without any M-class or above flares produced. The solar wind speed decreased to about 500 km/s. The geomagnetic field was at quiet to unsettled levels. The greater than 2 MeV electron flux at geosynchronous orbit maintained at minor storm levels.
	Published:	2025-11-02 00:30 UTC
	Forecaster:	012/041

Within the next three days, solar activity is expected to be moderate with a chance for M-class and above flares. The geomagnetic field is expected to be mainly at quiet and unsettled levels with isolated active levels on 2-3 Nov due to the effects of two coronal hole high speed streams. The greater than 2 MeV electron flux at geosynchronous orbit will maintain at minor storm levels.
	Published:	2025-11-02 00:30 UTC
	Forecaster:	012/041

During the last week, solar activity was low. Eleven active sunspot regions (AR4252, AR4254, AR4257, AR4261-4262, AR4266-4271) were on the visible disk without M-class or above flares produced. The F10.7 index decreased from 134 sfu to 118 sfu. The geomagnetic field reached active levels for 3 hours on 25 Oct. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed reached a peak value of 650 km/s during 28-31 Oct, the geomagnetic field reached minor storm levels for 12 hours, active levels for 27 hours and was at quiet to unsettled levels for the rest of the time.
	Published:	2025-10-31 06:30 UTC
	Forecaster:	016/042

Within the next week, solar activity is expected to be mainly moderate with a chance for M-class and above flares. Due to the effects of two coronal hole high speed streams, the geomagnetic field is expected to reach active to minor storm levels on 31 Oct-3 Nov. The geomagnetic field is expected to reach active levels on 6 Nov due to the effect of another coronal hole high speed stream. It will be quiet to unsettled for the rest of the time.
	Published:	2025-10-31 06:30 UTC
	Forecaster:	016/042

ALERTS


	Space environment alerts have been issued today.


	01:15 UTC 02 Nov 2025	23:37 UTC 02 Nov 2025	01:15 UTC 01 Nov 2025	04:00 UTC 31 Oct 2025	16:00 UTC 30 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:M1.0
	Peak Time:2025 Nov 02 00:26 UTC

	Updated:2025 Nov 02 21:02 UTC
	>>more data<<


	Current 5-min:4.639e-1 /cm².sr.s
	24-hr Max:7.744e-1 /cm².sr.s

	Updated:2025 Nov 02 20:55 UTC
	>>more data<<


	Speed:533.8 km/sec
	Density:1.5 protons/cm³

	Updated:2025 Nov 02 21:02 UTC
	>>more data<<


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

	Updated:2025 Nov 02 18:00 UTC
	>>more data<<


	Current 5-min:6.937e+3 /cm².sr.s
	Integral Flux:1.295e+7 /cm².sr.day

	Updated:2025 Nov 02 20:55 UTC
	>>more data<<


	10.7cm Flux:115 sfu

	Update:2025 Nov 01 UTC
	>>more data<<


	SSN:24

	Update:2025 Nov 01 UTC
	>>more data<<