IUGG: Association of Geomagnetism and Aeronomy

(International Service of Geomagnetic Indices)

April 2021

International quiet and disturbed days

Quietest days 1 - 5:628439
6 - 10: 82910512
Most disturbed days 1 - 5:1716*19*25*18*

Geomagnetic Planetary Indices

Kp three-hourlydaily
13o3-2+1o0+ 1o2o1+14-70.4
21+1-0o1-1o 3o2+1-10-50.2
31o1+1-1o1o 0+1o1-7o40.1
41o0o1-0+1o 1-0+1-5-30.0
51-0+0+2-2+ 1o1-0+7+40.1
60o0o0o0+1- 0+1o1-3o20.0
72o2+3-4-4- 4+3o1o23-150.9
81o1-0o1o1o 1-2-1o7o40.1
90+2o0o1-0+ 1o0o0+5-20.0
101-0+0+1-1o 2o1-2-7+40.1
112o2+2-1-1- 1-2o2-12-60.2
121o0+1-2-1+ 2o1o1-9-40.1
130+1o1-1+1+ 2o1+2-10-50.2
141-1o0o2-1o 2-2o3o11o60.3
153o3+5-1o2+ 2o1-1+18+120.7
162o2+3-2+3+ 3o5o4+25o191.0
174+5-5-4-4+ 4-3o4-32o281.2
184-3+3+4-3- 2+3o3+25+170.9
193+4-3o3+3o 3-3+3+26-170.9
203-3o2o3o2- 2+3+3o21o120.7
212o2+2+2-2- 1-1-1o12+60.3
221+1+1+1+1+ 0o0+2o9o40.1
233-3-2o2o1o 3o3-4+20+130.7
243-3-2-2o1+ 1o1+3-15+80.4
255o4o3-3-3- 2-3+2o24o181.0
264+4o3o1o2- 1-1-2-17o120.7
273-3o1+1+1o 1o0+0+11o60.3
281o0o0o0+0+ 1-0+1-3+20.0
291o1+1o1o1+ 1o1+0+8+40.1
300+1o0o1o0+ 3-2+2-9+50.2

Preliminary sudden commencements: none

Editor: GFZ German Research Centre for Geosciences
Adolf Schmidt Observatory for Geomagnetism