IUGG: Association of Geomagnetism and Aeronomy

(International Service of Geomagnetic Indices)

April 2026

International quiet and disturbed days

Geomagnetic Planetary Indices

Kp three-hourly									daily
	1	2	3	4	5	6	7	8	Sum	Ap	Cp
1	3o	2o	1o	1o	3o	2+	1+	2+	16o	8	0.5
2	4+	4o	5o	5-	5o	6o	5o	4-	38-	43	1.5
3	4-	4-	5+	4o	4-	6+	5+	6-	38-	46	1.5
4	4o	4-	3-	2+	1o	2-	4o	2o	21+	14	0.8
5	4-	3+	3o	2+	2+	3o	1+	1-	20-	12	0.7
6	1o	3-	2o	2o	2o	3-	3-	2+	17+	9	0.5
7	3o	2o	1+	0+	2-	2+	1+	3-	15-	8	0.4
8	2o	1+	1o	2-	2o	2-	2+	1+	13+	6	0.3
9	1o	1o	2-	1-	2+	2o	2-	2o	12+	6	0.3
10	4-	3-	2+	1+	4+	4o	4-	1+	23+	17	0.9
11	2o	4-	4-	3+	2+	2-	2-	1o	19+	12	0.7
12	2o	2o	2o	2o	3-	1+	2-	2-	15+	7	0.4
13	0+	1o	1-	1-	0+	1o	1-	1-	5+	3	0.1
14	1o	0o	0+	1o	1+	1+	0+	0o	5+	3	0.0
15	1-	1o	1o	0+	1o	2o	1o	1+	8+	4	0.1
16	0o	1o	1-	0+	0+	0+	1o	0+	4o	2	0.0
17	0o	0o	0o	0+	0+	0+	2o	3-	6-	3	0.1
18	3+	5o	5+	5o	4-	3+	3+	5-	34-	33	1.3
19	3+	4+	5+	3+	3-	3o	2+	1+	26-	21	1.1
20	0+	2o	4-	3+	3+	5o	5o	4-	26+	23	1.1
21	5-	4o	2o	2-	4-	4+	3+	2o	26-	20	1.0
22	1-	1o	0+	2-	2-	1o	1+	1+	9o	4	0.2
23	2-	3-	2o	1+	1+	1+	1o	1+	13-	6	0.3
24	2+	1o	2-	1o	1+	2-	3+	3o	15+	8	0.5
25	3+	1o	1-	1-	1o	2-	3+	3o	15-	9	0.5
26	2+	3+	2+	3o	1o	1+	3-	3+	19+	11	0.6
27	3o	2o	1-	1+	1o	2-	1o	1-	11+	6	0.3
28	0o	1-	0o	0+	1-	1-	1+	0o	4-	2	0.0
29	0o	0o	0+	1-	1+	0+	2-	1+	6-	3	0.1
30	2o	1+	1-	2-	2+	3-	4o	5-	19+	14	0.8
									Mean	12	0.55

Preliminary sudden commencements: none