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 very low. Three active sunspot regions were on the visible disk without any M-class and above flares produced. The solar wind speed decreased to about 330 km/s. The geomagnetic field was quiet.
	Published:	2026-04-16 00:30 UTC
	Forecaster:	025/040

Within the next three days, solar activity is expected to be mainly low with a little chance for M-class flares. The geomagnetic field is expected be mainly quiet to unsettled on 16 Apr, and is expected to reach active or minor storm levels on 17-18 Apr due to the effect of the recurrent coronal hole high speed streams.
	Published:	2026-04-16 00:30 UTC
	Forecaster:	025/040

During the last week, solar activity was high on 4 Apr, moderate on 3 Apr and 9 Apr, and low on other time. 13 active sunspot regions (AR4399, AR4403-AR4409, AR4411-AR4415) were on the visible disk with 7 M-class flares produced. No solar proton event occurred. The F10.7 index decreased from 136 sfu to 98 sfu. Due to the effect of the CME from 1 Apr and the coronal hole high speed stream, the solar wind speed reached a peak value of about 850 km/s and the geomagnetic field reached major storm levels for 3 hours, moderate storm levels for 6 hours, minor storm levels for 6 hours, and active levels for 21 hours on 3-5 Apr. The geomagnetic field was quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit was at minor storm levels on 5-9 Apr.
	Published:	2026-04-10 06:30 UTC
	Forecaster:	027/026

Within the next week, solar activity is expected to be mainly low with chance for M-class flares. Due to the effects of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach active or minor storm levels on 10-11 Apr. It will be quiet to unsettled for the rest of the time.
	Published:	2026-04-10 06:30 UTC
	Forecaster:	027/026

ALERTS


	No space environment alerts have been issued today.


	01:15 UTC 16 Apr 2026	00:15 UTC 10 Apr 2026	08:50 UTC 09 Apr 2026	01:15 UTC 09 Apr 2026	01:15 UTC 08 Apr 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.

right_bar


	24-hr Max:C1.2
	Peak Time:2026 Apr 16 00:53 UTC

	Updated:2026 Apr 16 10:14 UTC
	>>more data<<


	Current 5-min:2.439e-1 /cm².sr.s
	24-hr Max:2.963e-1 /cm².sr.s

	Updated:2026 Apr 16 10:10 UTC
	>>more data<<


	Speed:321.7 km/sec
	Density:1.6 protons/cm³

	Updated:2026 Apr 16 10:15 UTC
	>>more data<<


	Current:Kp=1
	24-hr Max:Kp=2

	Updated:2026 Apr 16 09:00 UTC
	>>more data<<


	Current 5-min:5.462e+2 /cm².sr.s
	Integral Flux:8.733e+7 /cm².sr.day

	Updated:2026 Apr 16 10:10 UTC
	>>more data<<


	10.7cm Flux:105 sfu

	Update:2026 Apr 15 UTC
	>>more data<<


	SSN:57

	Update:2026 Apr 15 UTC
	>>more data<<