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OVERVIEW & FORECAST

Daily Review
Day 1 To 3
Weekly Review
Weekly Forecast

During the past 24 hours, solar activity was moderate. Six active sunspot regions were on the visible disk with one M3.2 class flare produced. The solar wind speed decreased to about 400 km/s. The geomagnetic field was quiet.
	Published:	2026-07-27 00:30 UTC
	Forecaster:	015/039

Within the next three days, solar activity is expected to be low to moderate and likely to produce M-class flares. The geomagnetic field is expected to reach isolated active or minor storm levels on 27-28 Jul due to the effects of the CMEs on 24 Jul. It will be quiet to unsettled for the rest of time.
	Published:	2026-07-27 00:30 UTC
	Forecaster:	015/039

During the last week, solar activity was moderate on 20-22 Jul, and very low on 17 Jul, and low on other time. Six sunspot active regions (AR4489,AR4491-AR4495) were on the visible disk with five M-class flares produced. No solar proton event occurred. The F10.7 index ranged from 105 sfu to 150 sfu. Due to the effect of the recurrent coronal hole high speed stream, the solar wind speed reached a peak value of about 490 km/s and the geomagnetic field was at active levels for 3 hours. Due to the effects of recurrent coronal hole and CMEs on 21, solar wind speed reached a peak of about 710 km/s. The geomagnetic field reached minor storm levels for six hours. It was quiet to unsettled for the rest of time. It was quiet to unsettled for the rest of time.
	Published:	2026-07-24 06:30 UTC
	Forecaster:	042/025

Within the next week, solar activity is expected to be low to moderate with chances for M-class flares. The geomagnetic field is expected to reach active levels on 24 Jul. It will be quiet to unsettled for the rest of the time.The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach minor storm levels on 25-28 Jun.
	Published:	2026-07-24 06:30 UTC
	Forecaster:	042/025

ALERTS


	Space environment alerts have been issued today.


	02:48 UTC 27 Jul 2026	14:32 UTC 26 Jul 2026	19:00 UTC 23 Jul 2026	16:00 UTC 23 Jul 2026	06:37 UTC 22 Jul 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.

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	24-hr Max:M1.0
	Peak Time:2026 Jul 27 02:43 UTC

	Updated:2026 Jul 27 17:44 UTC
	>>more data<<


	Current 5-min:2.345e-1 /cm².sr.s
	24-hr Max:3.222e-1 /cm².sr.s

	Updated:2026 Jul 27 17:40 UTC
	>>more data<<


	Speed:395.64 km/sec
	Density:1.7 protons/cm³

	Updated:2026 Jul 27 17:43 UTC
	>>more data<<


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

	Updated:2026 Jul 27 15:00 UTC
	>>more data<<


	Current 5-min:1.014e+3 /cm².sr.s
	Integral Flux:6.336e+7 /cm².sr.day

	Updated:2026 Jul 27 17:40 UTC
	>>more data<<


	10.7cm Flux:148 sfu

	Update:2026 Jul 26 UTC
	>>more data<<


	SSN:99

	Update:2026 Jul 26 UTC
	>>more data<<