De ruimte - Weerstation Wilsele-Herent

Space Weather Observations, Alerts, and Forecast

Verwachting - tekst

Product: 3-Day Forecast - Issued: 2025 Nov 17 0030 UTC
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center.

Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 4 (below NOAA Scale levels).
The greatest expected 3 hr Kp for Nov 17-Nov 19 2025 is 4.67 (NOAA Scale G1).

NOAA Kp index breakdown Nov 17-Nov 19 2025

	Nov 17	Nov 18	Nov 19
00-03UT	3.67	3.00	2.67
03-06UT	4.67 (G1)	3.67	2.00
06-09UT	4.00	3.00	2.33
09-12UT	3.67	2.67	2.33
12-15UT	3.33	2.33	2.33
15-18UT	3.33	2.33	2.33
18-21UT	3.00	2.33	2.33
21-00UT	3.00	2.00	2.67

Rationale: G1 (Minor) geomagnetic storms are likely over 17 Nov due to a combination of a influence from a CME that left the Sun on 14 Nov and the anticipated influence of a negative polarity coronal hole.

Solar Radiation Activity Observation

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Nov 17-Nov 19 2025

	Nov 17	Nov 18	Nov 19
S1 or greater	10%	1%	1%

Rationale: There exists a slight chance for S1 (Minor) or greater solar radiation storms over 17 Nov due to potential from Region 4274 as it rotates further around the Suns W limb.

Radio Blackout Activity

Radio blackouts reaching the R1 levels were observed over the past 24 hours. The largest was at Nov 16 2025 0817 UTC.

Radio Blackout Forecast for Nov 17-Nov 19 2025

	Nov 17	Nov 18	Nov 19
R1-R2	55%	20%	10%
R3 or greater	15%	1%	1%

Rationale: R1-R2 (Minor-Moderate) radio blackouts are are likely, with a slight chance for R3 (Strong), over 17 Nov due to the flare potential from Region 4274 just beyond the the Suns W limb. Only a slight chance remains for R1 events by 19 Nov.

Sun Images

eit 171	eit 195	eit 284	eit 304


Images: From left to right: EIT 171, EIT 195, EIT 284, EIT 304 EIT (Extreme ultraviolet Imaging Telescope) images the solar atmosphere at several wavelengths, and therefore, shows solar material at different temperatures. In the images taken at 304 Angstrom the bright material is at 60,000 to 80,000 degrees Kelvin. In those taken at 171 Angstrom, at 1 million degrees. 195 Angstrom images correspond to about 1.5 million Kelvin, 284 Angstrom to 2 million degrees. The hotter the temperature, the higher you look in the solar atmosphere.

SDO/HMI Continuum	SDO/HMI Magnetogram	LASCO C2	LASCO C3


The MDI (Michelson Doppler Imager) images shown here are taken in the continuum near the Ni I 6768 Angstrom line. The most prominent features are the sun spots.		LASCO (Large Angle Spectrometric Coronagraph) is able to take images of the solar corona by blocking the light coming directly from the Sun with an occulter disk, creating an artificial eclipse within the instrument itself.
for more information
Bigger versions of this page in a new window: New regular size page, New 1280×1024 window, and New 1600×1200 window.

Introduction Movie

Conditions on the Sun and in the solar wind, magnetosphere, ionosphere and thermosphere that can influence the performance and reliability of space-borne and ground-based technological systems and can endanger human life or health. This introduction movie in the English language will open on a new tab/window when you click on the image below.