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INFORMATIONS LUNE ET SOLEIL
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INFORMATIONS METEOROLOGIQUES
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PREVISIONS METEOROLOGIQUES
CARTE METEOROLOGIQUE
COUVERTURE NUAGEUSE
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PREVISIONS AURORES BOREALES
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PREVISIONS AURORES EN EUROPE - 3O MIN
PREVISIONS DU KP - 3 JOURS
INDICE K SUR 3 HEURES 7 DERNIERS JOURS
INDICE A
COMPACT CORONAGRAPH (CCOR)
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ACTIVITE SOLAIRE
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SUIVI ERUPTIONS SOLAIRES
Taches solaires actuellement (NASA)
Nombre de taches solaires (ESA)
Activité solaire et impacts géomagnétique
:Product: 3-Day Forecast
:Issued: 2025 Nov 19 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast
The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Nov 19-Nov 21 2025 is 4.00 (below NOAA
Scale levels).
NOAA Kp index breakdown Nov 19-Nov 21 2025
Nov 19 Nov 20 Nov 21
00-03UT 1.67 1.67 2.00
03-06UT 1.33 1.33 1.33
06-09UT 1.33 1.33 1.33
09-12UT 1.33 1.33 2.00
12-15UT 1.33 1.33 2.33
15-18UT 1.33 1.33 3.00
18-21UT 1.67 1.67 3.33
21-00UT 1.67 1.67 4.00
Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No
significant transient or recurrent solar wind features are forecast.
B. NOAA Solar Radiation Activity Observation and Forecast
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 19-Nov 21 2025
Nov 19 Nov 20 Nov 21
S1 or greater 1% 1% 1%
Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.
C. NOAA Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
Radio Blackout Forecast for Nov 19-Nov 21 2025
Nov 19 Nov 20 Nov 21
R1-R2 15% 15% 15%
R3 or greater 1% 1% 1%
Rationale: A slight chance for R1-2 (Minor-Moderate) radio blackouts due
to isolated M-class flare activity will persit through 21 Nov due to the
flare potential presented by AR 4284.
