IUGG: Association of Geomagnetism and Aeronomy

(International Service of Geomagnetic Indices)

September 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	2-	1+	1o	2-	1o	1-	0+	1+	9o	4	0.2
2	1-	1-	0+	1+	1+	1-	1+	0o	6+	3	0.1
3	1o	1+	1+	2+	2+	2-	1+	2+	14-	6	0.3
4	2-	1-	1o	2-	1-	1-	1-	2o	9o	4	0.2
5	2o	2+	1+	1o	2o	2-	0+	1o	12-	6	0.2
6	2o	3-	0+	1o	1-	2-	1+	2o	12-	6	0.3
7	1-	1-	1o	2o	2-	2o	3-	4-	14+	8	0.4
8	4o	2-	3o	4o	3o	2+	2+	1o	21+	14	0.8
9	1-	2-	1o	1o	1-	1-	1o	2-	8+	4	0.1
10	1o	2o	2-	1-	1-	1+	3o	3+	14-	8	0.4
11	3+	0+	2-	1+	1o	1o	2-	2-	12o	6	0.3
12	1o	1o	1+	2o	1+	2-	1+	2-	11+	5	0.2
13	1o	0+	3o	2-	3-	2+	2-	3-	15+	8	0.4
14	2o	0+	1o	2-	2+	1+	2-	1-	11o	5	0.2
15	2-	2o	1+	1+	1-	1-	1-	2o	10+	5	0.2
16	1-	1+	0+	0+	0+	1-	1-	1o	5+	3	0.1
17	2o	3o	1-	3+	3o	4-	5o	5+	26o	23	1.1
18	3-	3+	3o	2+	2-	0+	0+	1-	14+	8	0.5
19	1-	0o	0o	0+	1+	0o	0+	0o	3-	2	0.0
20	1+	0+	0o	1o	0+	0+	0+	1o	5-	3	0.0
21	2+	0o	0+	0+	1-	3-	2+	3o	12-	6	0.3
22	4-	3-	4o	3-	1+	1-	1+	2o	18+	12	0.7
23	2+	3-	4-	2-	2o	2-	1+	0+	16-	9	0.5
24	2o	2o	2-	1o	1o	3+	2-	1-	13+	7	0.3
25	2o	2+	2-	2-	1o	1-	1o	2o	12+	6	0.3
26	0+	0+	0o	0o	0o	0o	0+	1-	2-	1	0.0
27	2+	2+	1o	1o	1-	2-	1+	2+	13-	6	0.3
28	1+	2o	2+	2+	2o	2o	3o	3-	18-	9	0.5
29	0+	0o	1-	1+	2o	1o	2-	1+	8+	4	0.1
30	1+	0o	0o	1-	1o	3-	4o	2+	12o	8	0.4
									Mean	7	0.31

Preliminary sudden commencements: none