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 low. Four active sunspot regions were on the visible disk without any M-class or above flares produced. Due to the effects of the recurrent coronal hole high speed streams, the solar wind speed reached a peak of about 570 km/s. The geomagnetic field reached minor storm levels for 6 hours and active levels for 6 hours, and was quiet to unsettled for the rest of the time.
	Published:	2026-08-19 00:30 UTC
	Forecaster:	010/039

Within the next three days, solar activity is expected to be mainly low with a chance for M-class flares. Due to the continuous effects of the recurrent coronal hole high speed streams, the geomagnetic field is expected to reach active to minor storm levels on 19-20 Aug, and be mainly at quiet to unsettled levels on 21 Aug.
	Published:	2026-08-19 00:30 UTC
	Forecaster:	010/039

During the last week, solar activity was very low on 7-8, 13 Aug and low for the rest of time. Twelve sunspot active regions (AR4498, AR4510, AR4502-AR4511) were on the visible disk without M-class or above flare produced. No SEP event occurred. The F10.7 index fluctuate between 94 sfu and 108 sfu. Due to the effect of recurrent coronal hole high speed stream, the solar wind speed reached a peak of about 480 km/s and the geomagnetic field reached moderate storm levels for 3 hours, minor storm levels for 3 hours and active levels for 9 hours on 8-9 Aug. It was quiet to unsettled for the rest of the time.
	Published:	2026-08-14 06:30 UTC
	Forecaster:	039/015

Within the next week, solar activity is expected to be mainly low with slight chances for M-class flares. The geomagnetic field is expected to be mainly quiet to unsettled with isolated active levels on 14-15 Aug due to the effect of a coronal hole high speed stream.
	Published:	2026-08-14 06:30 UTC
	Forecaster:	039/015

ALERTS


	No space environment alerts have been issued today.


	19:00 UTC 18 Aug 2026	03:00 UTC 18 Aug 2026	19:00 UTC 08 Aug 2026	13:00 UTC 08 Aug 2026	16:00 UTC 02 Aug 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:C3.9
	Peak Time:2026 Aug 18 06:43 UTC

	Updated:2026 Aug 19 01:34 UTC
	>>more data<<


	Current 5-min:2.158e-1 /cm².sr.s
	24-hr Max:3.460e-1 /cm².sr.s

	Updated:2026 Aug 19 01:30 UTC
	>>more data<<


	Speed:545.3 km/sec
	Density:3.9 protons/cm³

	Updated:2026 Aug 19 01:33 UTC
	>>more data<<


	Current:Kp=4
	24-hr Max:Kp=5

	Updated:2026 Aug 19 00:00 UTC
	>>more data<<


	Current 5-min:0.000e+0 /cm².sr.s
	Integral Flux:1.580e+7 /cm².sr.day

	Updated:2026 Aug 19 01:30 UTC
	>>more data<<


	10.7cm Flux:125 sfu

	Update:2026 Aug 18 UTC
	>>more data<<


	SSN:76

	Update:2026 Aug 17 UTC
	>>more data<<