Space Environment Prediction Center





You are here: Home

	Daily Forecast
	Weekly Forecast
	27-day F10.7 Forecast
	27-day Ap Forecast
	Solar Cycle Forecast

	Solar X-ray Flare
	Solar Proton Event
	RelativisticElectronEnhancement
	GeoMagnetic Storm

	AE Model
	Dst Model
	Sudden Ionosphere Disturbance
	Magnetopause & Bow Shock
	Kp Model
	GEO relativistic electron flux
	Chinese Assimilation TEC Model

	Cosmic Ray
	Station K Indices
	Ionosphere

	Coronal Hole Index
	Solar Active Regions
	F10.7 Index
	Ap Index

OVERVIEW & FORECAST

Daily Review
Day 1 To 3
Weekly Review
Weekly Forecast

During the past 24 hours, solar activity was high. Seven sunspot active regions were on the visble disk with one M6.0 flare produced. The solar wind speed maintained at about 680 km/s. The geomagnetic field reached minor storm levels for 9 hours and active levels for 12 hours due to the continuous effects of the recurrent coronal hole high speed stream and CME from 1 Dec.
	Published:	2025-12-05 00:30 UTC
	Forecaster:	039/022

Within the next three days, solar activity is expected to be mainly moderate with a chance for M-class flares. The geomagnetic field is expected to reach isolated active to storm levels on 5 Dec due to the effect of the recurrent coronal hole high speed stream and CME from 1 Dec. The geomagnetic field will be quie to unsettled on 6-7 Dec.
	Published:	2025-12-05 00:30 UTC
	Forecaster:	039/022

During the last week, solar activity was low. Nine sunspot active regions (AR4284-AR4285, AR4287-AR4293) were on the visible disk with no M-class flares and above produced. The F10.7 index ranged between 116 sfu and 121sfu. No solar proton event occurred. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed reached a peak value of 800 km/s on 25 Nov, the geomagnetic field reached minor storm levels for 12 hours and active levels for 63 hours on 23-27 Nov. It 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 25-27 Nov.
	Published:	2025-11-28 06:30 UTC
	Forecaster:	027/026

Within the next week, solar activity is expected to be mainly low. The geomagnetic field is expected to reach active levels on 28-29 Nov due to the continuous effect of the recurrent coronal hole high speed stream. It will reach active or minor storm levels on 3-4 Dec due to the effect of another coronal hole high speed stream. It will be quiet to unsettled for the rest of time. The greater than 2 MeV electron flux at geosynchronous orbit will remain at minor storm levels on 28 Nov-1 Dec.
	Published:	2025-11-28 06:30 UTC
	Forecaster:	027/026

ALERTS


	No space environment alerts have been issued today.


	07:00 UTC 04 Dec 2025	03:00 UTC 04 Dec 2025	02:59 UTC 04 Dec 2025	01:15 UTC 04 Dec 2025	01:00 UTC 04 Dec 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.

right_bar


	24-hr Max:M6.0
	Peak Time:2025 Dec 04 02:50 UTC

	Updated:2025 Dec 05 02:33 UTC
	>>more data<<


	Current 5-min:1.893e-1 /cm².sr.s
	24-hr Max:3.932e-1 /cm².sr.s

	Updated:2025 Dec 05 02:25 UTC
	>>more data<<


	Speed:591 km/sec
	Density:0.1 protons/cm³

	Updated:2025 Dec 05 02:41 UTC
	>>more data<<


	Current:Kp=3
	24-hr Max:Kp=5

	Updated:2025 Dec 05 00:00 UTC
	>>more data<<


	Current 5-min:0.000e+0 /cm².sr.s
	Integral Flux:2.894e+7 /cm².sr.day

	Updated:2025 Dec 05 02:25 UTC
	>>more data<<


	10.7cm Flux:220 sfu

	Update:2025 Dec 04 UTC
	>>more data<<


	SSN:165

	Update:2025 Dec 04 UTC
	>>more data<<