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

2

12-15h

2

15-18h

3

18-21h

4

21-00h

3

Tomorrow

00-03h

3

03-06h

3

06-09h

3

09-12h

2

12-15h

2

15-18h

2

18-21h

2

21-00h

2

Day After Tomorrow

00-03h

2

03-06h

2

06-09h

1

09-12h

1

12-15h

1

15-18h

1

18-21h

1

21-00h

2

27 Day Aurora Forecast

Jun 24

3

Jun 25

4

Jun 26

3

Jun 27

2

Jun 28

2

Jun 29

2

Jun 30

2

Jul 01

2

Jul 02

2

Jul 03

2

Jul 04

2

Jul 05

2

Jul 06

3

Jul 07

2

Jul 08

2

Jul 09

2

Jul 10

3

Jul 11

3

Jul 12

2

Jul 13

2

Jul 14

2

Jul 15

2

Jul 16

2

Jul 17

2

Jul 18

2

Jul 19

2

Jul 20

2