IUGG: Association of Geomagnetism and Aeronomy

(International Service of Geomagnetic Indices)


September 2021

International quiet and disturbed days

Quietest days 1 - 5:261920162
6 - 10: 9129415
Most disturbed days 1 - 5:178*22*23*28*

Geomagnetic Planetary Indices

Kp three-hourlydaily
12345678SumApCp
12-1+1o2-1o 1-0+1+9o40.2
21-1-0+1+1+ 1-1+0o6+30.1
31o1+1+2+2+ 2-1+2+14-60.3
42-1-1o2-1- 1-1-2o9o40.2
52o2+1+1o2o 2-0+1o12-60.2
62o3-0+1o1- 2-1+2o12-60.3
71-1-1o2o2- 2o3-4-14+80.4
84o2-3o4o3o 2+2+1o21+140.8
91-2-1o1o1- 1-1o2-8+40.1
101o2o2-1-1- 1+3o3+14-80.4
113+0+2-1+1o 1o2-2-12o60.3
121o1o1+2o1+ 2-1+2-11+50.2
131o0+3o2-3- 2+2-3-15+80.4
142o0+1o2-2+ 1+2-1-11o50.2
152-2o1+1+1- 1-1-2o10+50.2
161-1+0+0+0+ 1-1-1o5+30.1
172o3o1-3+3o 4-5o5+26o231.1
183-3+3o2+2- 0+0+1-14+80.5
191-0o0o0+1+ 0o0+0o3-20.0
201+0+0o1o0+ 0+0+1o5-30.0
212+0o0+0+1- 3-2+3o12-60.3
224-3-4o3-1+ 1-1+2o18+120.7
232+3-4-2-2o 2-1+0+16-90.5
242o2o2-1o1o 3+2-1-13+70.3
252o2+2-2-1o 1-1o2o12+60.3
260+0+0o0o0o 0o0+1-2-10.0
272+2+1o1o1- 2-1+2+13-60.3
281+2o2+2+2o 2o3o3-18-90.5
290+0o1-1+2o 1o2-1+8+40.1
301+0o0o1-1o 3-4o2+12o80.4
Mean70.31

Preliminary sudden commencements: none

Editor: GFZ German Research Centre for Geosciences
Adolf Schmidt Observatory for Geomagnetism
https://www.gfz-potsdam.de/en/kp-index/