Top 50 geomagnetic storms of 1999
On this page you will find an overview of the strongest geomagnetic storms of 1999 together with links to more information in our archive. The Kp-values on this page are the official, finalized Kp-values from the GFZ in Potsdam, Germany. The Ap-index provides a daily geomagnetic activity average. This page is updated daily. Times are in UTC.
| Ap | 00-03h | 03-06h | 06-09h | 09-12h | 12-15h | 15-18h | 18-21h | 21-00h | Kp max | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1999/10/22 | 91 | 7 | 8- | 8 | 5+ | 5- | 4+ | 6- | 3+ | 8 | View archive |
| 2 | 1999/09/22 | 50 | 3 | 2 | 2 | 3- | 5 | 4- | 6 | 8 | 8 | View archive |
| 3 | 1999/07/30 | 53 | 3- | 2 | 3- | 3+ | 5 | 5+ | 8- | 6+ | 8- | View archive |
| 4 | 1999/04/17 | 47 | 6 | 7+ | 5+ | 5 | 2+ | 2+ | 3- | 2- | 7+ | View archive |
| 5 | 1999/01/13 | 40 | 2+ | 2 | 1+ | 3+ | 4 | 5+ | 6- | 7 | 7 | View archive |
| 6 | 1999/02/18 | 80 | 5- | 6 | 7- | 7- | 7- | 5+ | 6 | 5 | 7- | View archive |
| 7 | 1999/11/13 | 43 | 4+ | 4+ | 4- | 3- | 5 | 5 | 6+ | 5+ | 6+ | View archive |
| 8 | 1999/03/10 | 34 | 5 | 6+ | 5- | 5 | 2+ | 3- | 3- | 2+ | 6+ | View archive |
| 9 | 1999/09/23 | 28 | 6+ | 6 | 3+ | 1+ | 1 | 2 | 2 | 2 | 6+ | View archive |
| 10 | 1999/09/13 | 46 | 6- | 6 | 5- | 4+ | 4+ | 5 | 5 | 4- | 6 | View archive |
| 11 | 1999/09/16 | 31 | 3+ | 6 | 5 | 4+ | 3+ | 4- | 3 | 3- | 6 | View archive |
| 12 | 1999/09/12 | 31 | 3- | 3+ | 2 | 5 | 3 | 4- | 6 | 5 | 6 | View archive |
| 13 | 1999/06/28 | 26 | 2+ | 6 | 6- | 3+ | 2+ | 2 | 2+ | 2+ | 6 | View archive |
| 14 | 1999/09/27 | 43 | 4+ | 4+ | 5- | 4+ | 5 | 6- | 5+ | 5- | 6- | View archive |
| 15 | 1999/03/01 | 41 | 6- | 5+ | 4- | 3 | 5 | 5- | 5 | 4+ | 6- | View archive |
| 16 | 1999/02/19 | 40 | 6- | 5+ | 5 | 4+ | 5+ | 4 | 4- | 3- | 6- | View archive |
| 17 | 1999/12/31 | 36 | 6- | 4+ | 4- | 4- | 4 | 4- | 5- | 5+ | 6- | View archive |
| 18 | 1999/08/20 | 36 | 3+ | 6- | 4 | 5 | 5 | 5- | 3 | 4- | 6- | View archive |
| 19 | 1999/10/10 | 33 | 3- | 4+ | 4+ | 5- | 5- | 6- | 4 | 3 | 6- | View archive |
| 20 | 1999/08/23 | 31 | 6- | 5- | 3+ | 3- | 4+ | 4 | 4 | 4 | 6- | View archive |
| 21 | 1999/08/24 | 29 | 4- | 4- | 4+ | 4 | 6- | 4 | 3+ | 3+ | 6- | View archive |
| 22 | 1999/03/29 | 28 | 3+ | 3 | 4+ | 4- | 6- | 4- | 4 | 4- | 6- | View archive |
| 23 | 1999/09/15 | 27 | 4- | 4- | 5 | 6- | 4- | 3- | 3 | 2- | 6- | View archive |
| 24 | 1999/12/13 | 26 | 4 | 5- | 6- | 4 | 4- | 3+ | 1+ | 0+ | 6- | View archive |
| 25 | 1999/03/02 | 22 | 6- | 4 | 3 | 2- | 3 | 3+ | 3- | 3- | 6- | View archive |
| 26 | 1999/10/12 | 46 | 5 | 5 | 4- | 5 | 5+ | 5+ | 5+ | 4+ | 5+ | View archive |
| 27 | 1999/10/23 | 32 | 4 | 5- | 3+ | 3- | 5+ | 5 | 4+ | 4 | 5+ | View archive |
| 28 | 1999/08/17 | 29 | 5- | 5- | 5+ | 3+ | 4+ | 3+ | 4- | 2+ | 5+ | View archive |
| 29 | 1999/08/16 | 29 | 2+ | 2 | 4- | 5- | 5+ | 5- | 5- | 3+ | 5+ | View archive |
| 30 | 1999/01/14 | 29 | 3- | 3- | 5 | 5+ | 4+ | 4 | 3 | 4+ | 5+ | View archive |
| 31 | 1999/07/31 | 28 | 5- | 5- | 4 | 1+ | 2 | 2+ | 5+ | 5- | 5+ | View archive |
| 32 | 1999/09/30 | 26 | 5- | 5+ | 4 | 4+ | 3+ | 3- | 3 | 2+ | 5+ | View archive |
| 33 | 1999/06/27 | 25 | 2 | 3- | 2+ | 4- | 5 | 4 | 5+ | 4- | 5+ | View archive |
| 34 | 1999/10/28 | 21 | 2+ | 2- | 3- | 2- | 4+ | 4 | 5+ | 3+ | 5+ | View archive |
| 35 | 1999/09/26 | 20 | 0 | 0 | 1- | 1 | 2 | 5 | 5- | 5+ | 5+ | View archive |
| 36 | 1999/02/28 | 17 | 0 | 1- | 2 | 1 | 3- | 4 | 4 | 5+ | 5+ | View archive |
| 37 | 1999/11/07 | 31 | 3+ | 4+ | 5- | 4+ | 5 | 5 | 3- | 3+ | 5 | View archive |
| 38 | 1999/10/15 | 31 | 5 | 5 | 4+ | 4 | 4- | 5- | 3+ | 3- | 5 | View archive |
| 39 | 1999/10/14 | 31 | 3+ | 4+ | 4- | 4- | 5- | 5 | 4+ | 4+ | 5 | View archive |
| 40 | 1999/12/04 | 30 | 4+ | 3 | 4 | 5 | 4+ | 5 | 4- | 3+ | 5 | View archive |
| 41 | 1999/03/04 | 30 | 3 | 4- | 5 | 4- | 4 | 5 | 5- | 4- | 5 | View archive |
| 42 | 1999/10/11 | 29 | 4+ | 3+ | 5- | 4- | 3+ | 5- | 3+ | 5 | 5 | View archive |
| 43 | 1999/08/18 | 28 | 4+ | 5- | 4+ | 3+ | 4 | 5 | 3 | 3 | 5 | View archive |
| 44 | 1999/05/18 | 27 | 4- | 4 | 4 | 4- | 4+ | 4 | 5 | 2+ | 5 | View archive |
| 45 | 1999/07/02 | 26 | 4- | 3+ | 5 | 4 | 2+ | 4 | 4 | 4+ | 5 | View archive |
| 46 | 1999/05/13 | 25 | 3+ | 5 | 5- | 3- | 5- | 4 | 2 | 3- | 5 | View archive |
| 47 | 1999/08/30 | 23 | 2- | 3- | 4+ | 5 | 3 | 4 | 4- | 4- | 5 | View archive |
| 48 | 1999/08/31 | 22 | 3 | 3+ | 3 | 3+ | 2+ | 3+ | 5 | 5- | 5 | View archive |
| 49 | 1999/11/24 | 21 | 3+ | 3+ | 4 | 5 | 3 | 3 | 3 | 2+ | 5 | View archive |
| 50 | 1999/01/23 | 21 | 2+ | 3 | 3 | 3+ | 2 | 4+ | 4 | 5 | 5 | View archive |
Latest news
Saturday, 23 March 2024
X1.1 solar flare with earth-directed CME
Wednesday, 20 March 2024
Sunspot region 3615, G1 watch
Thursday, 22 February 2024
X6.3 solar flare
Latest forum messages
AR 3637, 3638, 3643 37Weird SOHO Noise? 11Growth of Cycle 25 405Unproven theories 322Space Weather Memes 334
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!
Space weather facts
| Last X-flare | 2024/03/28 | X1.1 |
| Last M-flare | 2024/04/18 | M2.2 |
| Last geomagnetic storm | 2024/04/16 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2024 | 104.9 -19.8 |