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. Nine active sunspot regions were on the visble disk without M-class or above flares produced. The solar wind speed maintained at about 430 km/s. The geomagnetic field was at quiet to unsettled levels.
	Published:	2025-08-01 00:30 UTC
	Forecaster:	026/041

Within the next three days, the solar activity will be mainly low with a little chance for M-class flares. The geomagnetic field is expected to be mainly quiet to unsettled.
	Published:	2025-08-01 00:30 UTC
	Forecaster:	026/041

During the last week, solar activity was low. Seventeen sunspot regions (AR4149-AR4150, AR4153-AR4167) were on the visible disk without M-class and above flares produced. The F10.7 index ranged between 143 sfu to 152 sfu. No solar proton event occurred. Due to the effect of the CME on 23 Jul, the geomagnetic field reached active levels for 3 hours on 26 Jul. It was quiet to unsettled for the rest of the time. The greater than 2 MeV electron flux at geosynchronous orbit reached minor storm levels on 25-26 Jul.
	Published:	2025-08-01 06:30 UTC
	Forecaster:	041/026

Within the next week, solar activity is expected to be mainly low. Due to the effect of the recurrent coronal hole high speed stream, the geomagnetic field is expected to reach isolated active levels on 4-5 Aug and will be mainly quiet to unsettled for the rest of the time.
	Published:	2025-08-01 06:30 UTC
	Forecaster:	041/026

ALERTS


	No space environment alerts have been issued today.


	01:15 UTC 27 Jul 2025	00:15 UTC 26 Jul 2025	13:00 UTC 23 Jul 2025	01:15 UTC 23 Jul 2025	22:00 UTC 22 Jul 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:C3.4
	Peak Time:2025 Aug 01 18:17 UTC

	Updated:2025 Aug 01 19:15 UTC
	>>more data<<


	Current 5-min:2.018e-1 /cm².sr.s
	24-hr Max:2.697e-1 /cm².sr.s

	Updated:2025 Aug 01 19:10 UTC
	>>more data<<


	Speed:487 km/sec
	Density:4.2 protons/cm³

	Updated:2025 Aug 01 19:15 UTC
	>>more data<<


	Current:Kp=2
	24-hr Max:Kp=3

	Updated:2025 Aug 01 18:00 UTC
	>>more data<<


	Current 5-min:7.633e+2 /cm².sr.s
	Integral Flux:3.784e+7 /cm².sr.day

	Updated:2025 Aug 01 19:10 UTC
	>>more data<<


	10.7cm Flux:145 sfu

	Update:2025 Jul 31 UTC
	>>more data<<


	SSN:138

	Update:2025 Jul 31 UTC
	>>more data<<