IUGG: Association of Geomagnetism and Aeronomy

(International Service of Geomagnetic Indices)

April 2021

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	3-	2+	1o	0+	1o	2o	1+	14-	7	0.4
2	1+	1-	0o	1-	1o	3o	2+	1-	10-	5	0.2
3	1o	1+	1-	1o	1o	0+	1o	1-	7o	4	0.1
4	1o	0o	1-	0+	1o	1-	0+	1-	5-	3	0.0
5	1-	0+	0+	2-	2+	1o	1-	0+	7+	4	0.1
6	0o	0o	0o	0+	1-	0+	1o	1-	3o	2	0.0
7	2o	2+	3-	4-	4-	4+	3o	1o	23-	15	0.9
8	1o	1-	0o	1o	1o	1-	2-	1o	7o	4	0.1
9	0+	2o	0o	1-	0+	1o	0o	0+	5-	2	0.0
10	1-	0+	0+	1-	1o	2o	1-	2-	7+	4	0.1
11	2o	2+	2-	1-	1-	1-	2o	2-	12-	6	0.2
12	1o	0+	1-	2-	1+	2o	1o	1-	9-	4	0.1
13	0+	1o	1-	1+	1+	2o	1+	2-	10-	5	0.2
14	1-	1o	0o	2-	1o	2-	2o	3o	11o	6	0.3
15	3o	3+	5-	1o	2+	2o	1-	1+	18+	12	0.7
16	2o	2+	3-	2+	3+	3o	5o	4+	25o	19	1.0
17	4+	5-	5-	4-	4+	4-	3o	4-	32o	28	1.2
18	4-	3+	3+	4-	3-	2+	3o	3+	25+	17	0.9
19	3+	4-	3o	3+	3o	3-	3+	3+	26-	17	0.9
20	3-	3o	2o	3o	2-	2+	3+	3o	21o	12	0.7
21	2o	2+	2+	2-	2-	1-	1-	1o	12+	6	0.3
22	1+	1+	1+	1+	1+	0o	0+	2o	9o	4	0.1
23	3-	3-	2o	2o	1o	3o	3-	4+	20+	13	0.7
24	3-	3-	2-	2o	1+	1o	1+	3-	15+	8	0.4
25	5o	4o	3-	3-	3-	2-	3+	2o	24o	18	1.0
26	4+	4o	3o	1o	2-	1-	1-	2-	17o	12	0.7
27	3-	3o	1+	1+	1o	1o	0+	0+	11o	6	0.3
28	1o	0o	0o	0+	0+	1-	0+	1-	3+	2	0.0
29	1o	1+	1o	1o	1+	1o	1+	0+	8+	4	0.1
30	0+	1o	0o	1o	0+	3-	2+	2-	9+	5	0.2
									Mean	8	0.40

Preliminary sudden commencements: none