Aurora Forecast

The K-index quantifies disturbances in the horizontal component of earth’s magnetic field with an integer in the range 0–9 with 1 being calm and 5 or more indicating a geomagnetic storm. It is derived from the maximum fluctuations of horizontal components observed on a magnetometer during a three-hour interval.

The official planetary Kp-index is derived by calculating a weighted average of K-indices from a network of geomagnetic observatories. Since these observatories do not report their data in real-time, various operations centers around the globe estimate the index based on data available from their local network of observatories. The Kp-index was introduced by Bartels in 1939.

Today

00-03h

2

03-06h

2

06-09h

2

09-12h

1

12-15h

1

15-18h

2

18-21h

3

21-00h

2

Tomorrow

00-03h

3

03-06h

3

06-09h

2

09-12h

2

12-15h

1

15-18h

1

18-21h

1

21-00h

2

Day After Tomorrow

00-03h

2

03-06h

2

06-09h

2

09-12h

1

12-15h

1

15-18h

1

18-21h

1

21-00h

1

27 Day Aurora Forecast

Jul 22

2

Jul 23

3

Jul 24

3

Jul 25

2

Jul 26

3

Jul 27

3

Jul 28

3

Jul 29

2

Jul 30

2

Jul 31

2

Aug 01

2

Aug 02

2

Aug 03

2

Aug 04

3

Aug 05

4

Aug 06

4

Aug 07

3

Aug 08

2

Aug 09

2

Aug 10

2

Aug 11

2

Aug 12

2

Aug 13

2

Aug 14

2

Aug 15

2

Aug 16

2

Aug 17

2