G1minor

The geomagnetic storm of 28 – 29 July 2003

On 28 – 29 July 2003 the Kp index reached 5+: a G1 (minor) storm, with 21 hours at Kp 5 or more. At its peak the lights could be seen from 317,119 places in the atlas, down to about 50° magnetic latitude.

Kp 5+Peak Kp · 28 July 2003 12:00 UT

21Hours at Kp 5 or more

56Largest ap

Solar cycle 23Year 7 of solar cycle 23

Kp every three hours

56789

27 Jul28 Jul29 Jul30 Jul

Where the lights could be seen

At Kp 5+ the lights reach 317,119 places of the atlas on the horizon and 96,450 overhead, down to about 50° magnetic latitude.

Countries

Russia131,171 placesUnited States28,690 placesSweden27,876 placesFinland24,291 placesLithuania20,313 placesCanada19,020 placesNorway13,111 placesBelarus11,151 placesUnited Kingdom8,813 placesLatvia7,542 places

At the edge: just within reach

PortlandUnited StatesVilniusLithuaniaNovokuznetskRussiaKaliningradRussiaGdańskPolandTulaRussiaClevelandUnited StatesSaranskRussia

The largest towns that could see them

Before and after

Previous storm26 – 27 July 2003 · Kp 6

Next storm31 July – 1 August 2003 · Kp 6−

2003

Geomagnetic storms of 2003Every storm

Geomagnetic storms since 1932Geomagnetic storm archive

Strong storms at the same time of year

26 – 27 July 1946Kp 9 · 21 h

26 – 27 July 2004Kp 9− · 27 h

24 – 27 July 1981Kp 8+ · 45 h

26 – 27 July 1961Kp 8+ · 24 h

24 – 26 July 2004Kp 8 · 36 h

30 – 31 July 1999Kp 8− · 18 h