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Geomagnetic storms in April 2026

April 2026 had 5 days with geomagnetic storms (Kp ≥ 5). The strongest activity was on April 3 (Kp 6.33, a G2 storm). Below is the day-by-day geomagnetic storm calendar based on NOAA SWPC and GFZ Potsdam data.

Date	Day	Kp	Level	Status
01.04	Wed	3	—	Whisper
02.04	Thu	6	G2	Notable storm
03.04	Fri	6.33	G2	Notable storm
04.04	Sat	4	—	Mild storm
05.04	Sun	3.67	—	Whisper
06.04	Mon	2.67	—	Quiet
07.04	Tue	3	—	Whisper
08.04	Wed	2.33	—	Quiet
09.04	Thu	2.33	—	Quiet
10.04	Fri	4.33	—	Mild storm
11.04	Sat	3.67	—	Whisper
12.04	Sun	2.67	—	Quiet
13.04	Mon	1	—	Quiet
14.04	Tue	1.33	—	Quiet
15.04	Wed	2	—	Quiet
16.04	Thu	1	—	Quiet
17.04	Fri	2.67	—	Quiet
18.04	Sat	5.33	G1	Notable storm
19.04	Sun	5.33	G1	Notable storm
20.04	Mon	5	G1	Notable storm
21.04	Tue	4.67	—	Mild storm
22.04	Wed	1.67	—	Quiet
23.04	Thu	2.67	—	Quiet
24.04	Fri	3.33	—	Whisper
25.04	Sat	3.33	—	Whisper
26.04	Sun	3.33	—	Whisper
27.04	Mon	3	—	Whisper
28.04	Tue	1.33	—	Quiet
29.04	Wed	1.67	—	Quiet
30.04	Thu	4.67	—	Mild storm

Most active days

3 April — Kp 6.33 (G2), Notable storm
2 April — Kp 6 (G2), Notable storm
18 April — Kp 5.33 (G1), Notable storm

How to read this calendar

Each day shows the maximum Kp index for that day and the matching NOAA storm level (G1–G5). Past days are observed values (GFZ Potsdam); upcoming days are the NOAA SWPC forecast. What is the Kp index →

FAQ

Were there geomagnetic storms in April 2026?

April 2026 had 5 days with geomagnetic storms of level G1 or higher (Kp ≥ 5).

Which day in April had the strongest storm?

The strongest geomagnetic storm in April 2026 was on April 3, when Kp reached 6.33, a G2 storm.

Where does this calendar data come from?

Kp index data comes from NOAA SWPC (forecast) and GFZ Potsdam (observed values) — the global standards for measuring geomagnetic activity.