Geomagnetic Activity Map - Hourly Ranges
Note: Empty cells of observatories (indicated in the leftmost column by their IAGA codes) indicate that there was insufficient data to calculate a hourly range.
| IAGA | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AAA | ||||||||||||||||||||||||
| AAE | 2 | 8 | 11 | 14 | 4 | 23 | 36 | 22 | 18 | 16 | 10 | 31 | 28 | 13 | 8 | 3 | 7 | 4 | 4 | 20 | 13 | 17 | 20 | 9 |
| ABG | 5 | 3 | 9 | 10 | 9 | 7 | 6 | 13 | 3 | 5 | 4 | 7 | 6 | 5 | 6 | 6 | 6 | 10 | 6 | 24 | 24 | 23 | 19 | 6 |
| ABK | 8 | 19 | 125 | 118 | 57 | 50 | 51 | 48 | 22 | 12 | 8 | 10 | 14 | 18 | 42 | 71 | 22 | 18 | 15 | 25 | 575 | 382 | 365 | 100 |
| AIA | 3 | 2 | 14 | 18 | 6 | 19 | 9 | 9 | 9 | 5 | 3 | 3 | 4 | 8 | 10 | 5 | 10 | 9 | 7 | 6 | 77 | 15 | 30 | 21 |
| AMS | 2 | 1 | 13 | 6 | 9 | 6 | 5 | 14 | 7 | 6 | 5 | 7 | 5 | 3 | 4 | 4 | 6 | 2 | 4 | 10 | 26 | 17 | 34 | 4 |
| API | 2 | 6 | 19 | 7 | 3 | 4 | 17 | 10 | 2 | 8 | 3 | 2 | 2 | 3 | 2 | 4 | 6 | 9 | 8 | 6 | 24 | 14 | 7 | 6 |
| AQU | 2 | 2 | 5 | 13 | 4 | 3 | 8 | 8 | 2 | 5 | 8 | 4 | 3 | 7 | 5 | 4 | 11 | 4 | 3 | 9 | 15 | 20 | 27 | 9 |
| ARS | ||||||||||||||||||||||||
| ASC | 3 | 3 | 8 | 8 | 2 | 5 | 6 | 3 | 4 | 5 | 11 | 9 | 7 | 7 | 8 | 10 | 8 | 2 | 3 | 12 | 43 | 18 | 19 | 17 |
| ASP | 2 | 8 | 24 | 10 | 6 | 5 | 12 | 15 | 9 | 9 | 2 | 2 | 3 | 5 | 6 | 6 | 7 | 5 | 5 | 11 | 16 | 22 | 18 | 6 |
| BDV | 2 | 3 | 6 | 18 | 4 | 5 | 8 | 14 | 4 | 2 | 5 | 3 | 3 | 6 | 6 | 11 | 13 | 6 | 4 | 10 | 16 | 22 | 31 | 10 |
| BEL | 3 | 3 | 12 | 24 | 5 | 6 | 7 | 20 | 5 | 3 | 4 | 4 | 4 | 10 | 11 | 25 | 14 | 9 | 7 | 13 | 30 | 29 | 33 | 11 |
| BFE | 4 | 4 | 14 | 28 | 5 | 8 | 7 | 19 | 7 | 5 | 5 | 3 | 12 | 13 | 19 | 39 | 19 | 12 | 9 | 19 | 44 | 36 | 25 | 9 |
| BFO | ||||||||||||||||||||||||
| BLC | 30 | 68 | 171 | 393 | 321 | 57 | 20 | 45 | 23 | 30 | 29 | 16 | 47 | 71 | 55 | 81 | 86 | 54 | 22 | 152 | 350 | 114 | 143 | 57 |
| BMT | 4 | 8 | 25 | 5 | 7 | 16 | 19 | 12 | 2 | 5 | 2 | 3 | 3 | 7 | 7 | 7 | 10 | 5 | 7 | 17 | 22 | 28 | 14 | 11 |
| BNG | 3 | 3 | 7 | 9 | 3 | 3 | 9 | 11 | 13 | 11 | 3 | 4 | 8 | 11 | 10 | 3 | 7 | 3 | 3 | 19 | 24 | 17 | 20 | 13 |
| BOU | 4 | 2 | 17 | 20 | 20 | 6 | 32 | 8 | 9 | 7 | 3 | 2 | 2 | 8 | 18 | 11 | 16 | 20 | 8 | 15 | 47 | 21 | 46 | 31 |
| BOX | 4 | 3 | 18 | 21 | 6 | 10 | 7 | 29 | 9 | 10 | 12 | 4 | 9 | 15 | 22 | 40 | 19 | 12 | 10 | 16 | 45 | 29 | 38 | 12 |
| BRW | 24 | 59 | 93 | 98 | 102 | 124 | 88 | 261 | 183 | 139 | 47 | 64 | 81 | 30 | 56 | 129 | 184 | 95 | 39 | 197 | 615 | 467 | 512 | 63 |
| BSL | 4 | 5 | 9 | 12 | 10 | 10 | 25 | 7 | 7 | 7 | 3 | 1 | 6 | 20 | 3 | 28 | 23 | 3 | 9 | 17 | 57 | 22 | 31 | 31 |
| CBB | 38 | 60 | 87 | 134 | 91 | 21 | 43 | 32 | 23 | 19 | 19 | 28 | 33 | 49 | 57 | 68 | 84 | 57 | 32 | 189 | 314 | 95 | 207 | 28 |
| CLF | 2 | 4 | 6 | 13 | 5 | 4 | 9 | 9 | 2 | 5 | 2 | 5 | 2 | 7 | 5 | 8 | 15 | 6 | 4 | 11 | 22 | 22 | 25 | 11 |
| CMO | 12 | 50 | 25 | 59 | 55 | 97 | 116 | 64 | 98 | 83 | 24 | 7 | 7 | 17 | 17 | 37 | 34 | 15 | 9 | 68 | 96 | 124 | 148 | 65 |
| CNB | 8 | 2 | 17 | 11 | 4 | 7 | 21 | 13 | 7 | 10 | 3 | 2 | 3 | 4 | 6 | 6 | 5 | 6 | 3 | 7 | 28 | 28 | 33 | 4 |
| CSY | ||||||||||||||||||||||||
| CTA | 2 | 4 | 24 | 14 | 10 | 5 | 14 | 14 | 9 | 10 | 3 | 2 | 3 | 4 | 5 | 6 | 7 | 6 | 5 | 11 | 12 | 18 | 21 | 10 |
| CZT | 3 | 2 | 9 | 11 | 4 | 12 | 17 | 17 | 5 | 4 | 8 | 8 | 8 | 3 | 3 | 2 | 4 | 2 | 4 | 6 | 35 | 20 | 29 | 10 |
| DLR | 3 | 6 | 10 | 12 | 14 | 6 | 28 | 6 | 7 | 7 | 3 | 2 | 2 | 12 | 4 | 25 | 12 | 4 | 3 | 18 | 56 | 20 | 31 | 29 |
| DOU | 2 | 4 | 7 | 11 | 6 | 4 | 10 | 12 | 7 | 3 | 3 | 5 | 3 | 6 | 8 | 13 | 16 | 9 | 5 | 13 | 26 | 27 | 25 | 11 |
| DRV | 37 | 34 | 76 | 31 | 12 | 39 | 29 | 27 | 19 | 21 | 9 | 8 | 5 | 8 | 10 | 9 | 11 | 26 | 8 | 40 | 77 | 58 | 25 | 48 |
| EBR | 3 | 2 | 6 | 13 | 7 | 14 | 10 | 9 | 13 | 11 | 15 | 16 | 2 | 11 | 15 | 13 | 20 | 11 | 7 | 10 | 24 | 21 | 26 | 14 |
| ESK | 2 | 6 | 7 | 12 | 9 | 7 | 12 | 11 | 6 | 10 | 9 | 7 | 10 | 12 | 16 | 35 | 20 | 10 | 11 | 24 | 44 | 40 | 22 | 14 |
| EUA | ||||||||||||||||||||||||
| EYR | 5 | 3 | 15 | 6 | 5 | 5 | 24 | 16 | 6 | 12 | 3 | 2 | 3 | 4 | 5 | 5 | 4 | 7 | 3 | 9 | 50 | 14 | 30 | 14 |
| FCC | 12 | 44 | 252 | 234 | 203 | 235 | 90 | 112 | 170 | 36 | 25 | 8 | 11 | 27 | 38 | 74 | 34 | 41 | 14 | 126 | 75 | 97 | 165 | 41 |
| FRD | 4 | 2 | 16 | 19 | 3 | 19 | 18 | 6 | 6 | 5 | 2 | 6 | 10 | 14 | 9 | 13 | 20 | 8 | 8 | 13 | 51 | 30 | 39 | 27 |
| FRN | 2 | 3 | 20 | 13 | 17 | 7 | 28 | 9 | 6 | 8 | 3 | 2 | 3 | 6 | 8 | 6 | 7 | 22 | 10 | 18 | 48 | 12 | 30 | 23 |
| FUR | 2 | 3 | 5 | 16 | 4 | 4 | 8 | 13 | 3 | 3 | 3 | 4 | 3 | 6 | 5 | 9 | 14 | 6 | 4 | 10 | 17 | 21 | 28 | 10 |
| GCK | ||||||||||||||||||||||||
| GDH | 25 | 35 | 74 | 219 | 79 | 98 | 74 | 47 | 81 | 75 | 24 | 22 | 46 | 48 | 33 | 98 | 70 | 31 | 51 | 107 | 216 | 105 | 97 | 33 |
| GNA | 5 | 13 | 25 | 12 | 4 | 10 | 17 | 10 | 8 | 9 | 3 | 2 | 3 | 4 | 5 | 6 | 5 | 4 | 5 | 8 | 32 | 24 | 22 | 8 |
| GUA | 13 | 3 | 19 | 22 | 21 | 11 | 5 | 12 | 4 | 7 | 2 | 2 | 2 | 4 | 3 | 4 | 6 | 5 | 5 | 13 | 10 | 16 | 6 | 15 |
| GUI | 3 | 2 | 9 | 10 | 4 | 5 | 8 | 6 | 7 | 9 | 8 | 4 | 3 | 7 | 6 | 3 | 6 | 4 | 4 | 14 | 36 | 16 | 16 | 16 |
| GZH | 5 | 7 | 4 | 6 | 3 | 4 | 3 | 16 | 3 | 3 | 1 | 2 | 2 | 5 | 4 | 5 | 8 | 4 | 6 | 17 | 17 | 23 | 12 | 8 |
| HAD | 2 | 5 | 7 | 13 | 6 | 6 | 11 | 9 | 3 | 7 | 9 | 5 | 7 | 7 | 8 | 14 | 16 | 7 | 6 | 16 | 30 | 29 | 23 | 13 |
| HBK | 4 | 2 | 9 | 8 | 3 | 5 | 10 | 7 | 3 | 2 | 8 | 2 | 3 | 3 | 6 | 6 | 6 | 3 | 5 | 15 | 22 | 13 | 21 | 12 |
| HER | 3 | 2 | 8 | 7 | 3 | 5 | 9 | 5 | 8 | 3 | 2 | 3 | 4 | 5 | 6 | 6 | 5 | 2 | 4 | 9 | 27 | 12 | 19 | 13 |
| HLP | 3 | 4 | 8 | 20 | 7 | 6 | 7 | 20 | 6 | 3 | 3 | 5 | 7 | 12 | 23 | 31 | 17 | 9 | 10 | 16 | 36 | 39 | 23 | 11 |
| HON | 1 | 10 | 24 | 16 | 10 | 3 | 17 | 7 | 2 | 8 | 3 | 2 | 2 | 3 | 3 | 4 | 5 | 2 | 9 | 8 | 26 | 12 | 9 | 13 |
| HRB | 2 | 3 | 6 | 17 | 4 | 4 | 10 | 13 | 5 | 3 | 5 | 2 | 3 | 7 | 6 | 10 | 13 | 6 | 5 | 10 | 16 | 24 | 31 | 10 |
| HRN | 19 | 29 | 51 | 169 | 43 | 91 | 80 | 181 | 178 | 78 | 34 | 40 | 41 | 72 | 62 | 68 | 46 | 62 | 38 | 40 | 437 | 285 | 96 | 27 |
| HUA | 1 | 7 | 11 | 13 | 7 | 9 | 17 | 4 | 3 | 6 | 7 | 10 | 26 | 34 | 45 | 36 | 21 | 39 | 21 | 33 | 96 | 36 | 34 | 20 |
| HYB | ||||||||||||||||||||||||
| IPM | ||||||||||||||||||||||||
| IQA | 28 | 34 | 371 | 198 | 174 | 204 | 94 | 59 | 99 | 37 | 24 | 21 | 47 | 70 | 79 | 73 | 83 | 65 | 58 | 304 | 412 | 91 | 150 | 49 |
| IRT | 4 | 15 | 35 | 9 | 6 | 19 | 30 | 17 | 6 | 12 | 4 | 5 | 2 | 7 | 7 | 10 | 12 | 6 | 5 | 17 | 21 | 36 | 23 | 8 |
| IZN | ||||||||||||||||||||||||
| KAK | 2 | 2 | 10 | 6 | 2 | 7 | 8 | 12 | 3 | 8 | 3 | 3 | 2 | 4 | 4 | 4 | 6 | 3 | 6 | 9 | 10 | 19 | 14 | 8 |
| KDU | 9 | 8 | 24 | 16 | 13 | 4 | 7 | 16 | 7 | 9 | 3 | 2 | 2 | 4 | 4 | 5 | 6 | 4 | 5 | 11 | 13 | 17 | 10 | 7 |
| KMH | ||||||||||||||||||||||||
| KNY | 2 | 4 | 8 | 4 | 2 | 3 | 9 | 14 | 4 | 7 | 4 | 2 | 2 | 5 | 5 | 5 | 7 | 4 | 6 | 13 | 13 | 22 | 11 | 5 |
| KOU | 2 | 4 | 9 | 10 | 3 | 8 | 6 | 3 | 4 | 8 | 13 | 13 | 15 | 9 | 5 | 7 | 6 | 9 | 11 | 20 | 57 | 18 | 24 | 19 |
| LER | 2 | 4 | 15 | 15 | 6 | 9 | 8 | 13 | 5 | 11 | 6 | 6 | 9 | 13 | 19 | 42 | 17 | 10 | 10 | 27 | 57 | 51 | 71 | 11 |
| LRM | 3 | 7 | 29 | 9 | 3 | 8 | 10 | 11 | 7 | 8 | 3 | 2 | 3 | 5 | 6 | 8 | 7 | 5 | 5 | 12 | 29 | 24 | 16 | 8 |
| LVV | 3 | 3 | 7 | 17 | 5 | 5 | 7 | 15 | 6 | 6 | 5 | 4 | 5 | 7 | 11 | 16 | 14 | 7 | 6 | 11 | 20 | 27 | 29 | 10 |
| LYC | ||||||||||||||||||||||||
| LZH | 4 | 3 | 20 | 10 | 3 | 12 | 17 | 11 | 4 | 7 | 3 | 2 | 3 | 7 | 6 | 7 | 10 | 5 | 6 | 18 | 23 | 28 | 11 | 5 |
| MAB | ||||||||||||||||||||||||
| MAW | ||||||||||||||||||||||||
| MBO | 3 | 3 | 9 | 9 | 3 | 4 | 8 | 4 | 12 | 16 | 11 | 1 | 4 | 6 | 7 | 4 | 5 | 8 | 8 | 17 | 41 | 19 | 21 | 15 |
| MCQ | 8 | 11 | 14 | 35 | 13 | 20 | 12 | 37 | 28 | 16 | 3 | 3 | 3 | 4 | 4 | 9 | 4 | 9 | 3 | 11 | 156 | 52 | 132 | 30 |
| MEA | 13 | 20 | 42 | 24 | 23 | 20 | 37 | 58 | 47 | 16 | 7 | 4 | 6 | 6 | 14 | 20 | 11 | 15 | 7 | 17 | 49 | 74 | 67 | 16 |
| MGD | ||||||||||||||||||||||||
| MID | ||||||||||||||||||||||||
| MMB | 4 | 4 | 12 | 5 | 5 | 7 | 14 | 15 | 4 | 9 | 2 | 2 | 2 | 5 | 6 | 7 | 8 | 3 | 8 | 12 | 14 | 27 | 29 | 18 |
| NAQ | 9 | 11 | 369 | 137 | 118 | 139 | 258 | 113 | 82 | 31 | 13 | 18 | 10 | 15 | 20 | 37 | 35 | 24 | 29 | 136 | 183 | 159 | 91 | 76 |
| NCK | 2 | 3 | 4 | 14 | 4 | 4 | 10 | 13 | 4 | 2 | 5 | 2 | 3 | 7 | 5 | 9 | 12 | 5 | 4 | 9 | 16 | 22 | 28 | 9 |
| NEW | 10 | 8 | 37 | 23 | 24 | 15 | 37 | 20 | 10 | 8 | 3 | 2 | 4 | 6 | 12 | 10 | 13 | 10 | 11 | 13 | 47 | 38 | 59 | 30 |
| NGK | 2 | 3 | 9 | 24 | 5 | 7 | 8 | 16 | 6 | 3 | 2 | 4 | 5 | 8 | 12 | 21 | 16 | 8 | 6 | 15 | 27 | 30 | 30 | 11 |
| NUR | 3 | 2 | 21 | 26 | 6 | 12 | 7 | 27 | 10 | 5 | 9 | 3 | 12 | 14 | 25 | 45 | 19 | 13 | 9 | 18 | 63 | 43 | 47 | 16 |
| NVS | 4 | 9 | 31 | 16 | 8 | 11 | 23 | 18 | 8 | 13 | 3 | 4 | 5 | 7 | 8 | 11 | 12 | 6 | 6 | 15 | 26 | 40 | 23 | 4 |
| OTT | 5 | 4 | 19 | 28 | 14 | 26 | 17 | 4 | 12 | 5 | 2 | 4 | 11 | 12 | 14 | 16 | 25 | 10 | 7 | 32 | 59 | 54 | 72 | 22 |
| PAF | 3 | 3 | 8 | 14 | 7 | 7 | 13 | 23 | 7 | 10 | 7 | 6 | 8 | 5 | 6 | 5 | 6 | 3 | 5 | 9 | 68 | 74 | 84 | 24 |
| PAG | ||||||||||||||||||||||||
| PEG | ||||||||||||||||||||||||
| PHU | 5 | 11 | 6 | 6 | 3 | 4 | 4 | 16 | 4 | 3 | 2 | 1 | 2 | 6 | 4 | 6 | 9 | 5 | 5 | 20 | 22 | 27 | 13 | 6 |
| PPT | 3 | 4 | 9 | 5 | 10 | 5 | 19 | 8 | 2 | 7 | 3 | 2 | 2 | 2 | 3 | 4 | 11 | 11 | 9 | 8 | 33 | 21 | 9 | 4 |
| PST | ||||||||||||||||||||||||
| QSB | 3 | 2 | 9 | 14 | 8 | 3 | 7 | 11 | 8 | 9 | 6 | 7 | 3 | 10 | 11 | 5 | 15 | 6 | 5 | 20 | 17 | 27 | 34 | 9 |
| RES | 35 | 56 | 38 | 69 | 26 | 44 | 44 | 48 | 37 | 35 | 18 | 20 | 61 | 113 | 127 | 153 | 107 | 257 | 242 | 266 | 205 | 67 | 263 | 48 |
| SBA | 28 | 57 | 75 | 36 | 29 | 55 | 55 | 24 | 9 | 15 | 63 | 23 | 8 | 15 | 28 | 41 | 20 | 26 | 27 | 41 | 61 | 46 | 77 | 24 |
| SFS | ||||||||||||||||||||||||
| SHU | ||||||||||||||||||||||||
| SIT | 7 | 16 | 26 | 16 | 21 | 33 | 24 | 25 | 13 | 20 | 5 | 2 | 4 | 7 | 6 | 8 | 13 | 7 | 5 | 21 | 43 | 40 | 30 | 18 |
| SJG | 2 | 3 | 8 | 9 | 4 | 9 | 8 | 3 | 2 | 3 | 2 | 2 | 4 | 10 | 14 | 9 | 8 | 4 | 9 | 15 | 46 | 15 | 17 | 19 |
| SOD | 6 | 13 | 54 | 79 | 25 | 28 | 33 | 38 | 18 | 12 | 8 | 6 | 12 | 17 | 38 | 62 | 22 | 17 | 13 | 32 | 481 | 396 | 553 | 123 |
| SPT | 3 | 2 | 8 | 10 | 4 | 4 | 8 | 7 | 3 | 5 | 15 | 8 | 3 | 8 | 4 | 3 | 10 | 5 | 4 | 10 | 26 | 21 | 22 | 14 |
| STJ | 3 | 4 | 9 | 33 | 9 | 9 | 5 | 3 | 15 | 8 | 8 | 10 | 10 | 8 | 4 | 13 | 23 | 7 | 10 | 30 | 53 | 36 | 34 | 16 |
| SUA | 2 | 3 | 6 | 15 | 5 | 2 | 7 | 14 | 8 | 12 | 10 | 3 | 7 | 6 | 7 | 9 | 15 | 5 | 6 | 13 | 15 | 34 | 20 | 10 |
| TAM | 2 | 2 | 7 | 9 | 3 | 4 | 9 | 6 | 20 | 14 | 3 | 4 | 5 | 11 | 5 | 2 | 7 | 4 | 4 | 16 | 27 | 20 | 19 | 13 |
| TAN | 3 | 2 | 5 | 8 | 6 | 3 | 5 | 7 | 8 | 5 | 5 | 2 | 1 | 5 | 4 | 4 | 6 | 3 | 4 | 14 | 11 | 13 | 20 | 6 |
| TDC | ||||||||||||||||||||||||
| THL | 20 | 32 | 86 | 41 | 13 | 45 | 23 | 38 | 17 | 59 | 16 | 51 | 79 | 158 | 160 | 207 | 153 | 76 | 69 | 169 | 143 | 79 | 190 | 34 |
| THY | 2 | 3 | 5 | 15 | 5 | 3 | 10 | 14 | 6 | 5 | 5 | 2 | 4 | 8 | 6 | 9 | 14 | 6 | 5 | 11 | 17 | 25 | 31 | 9 |
| TRW | ||||||||||||||||||||||||
| TSU | 3 | 3 | 8 | 9 | 3 | 5 | 9 | 8 | 3 | 3 | 4 | 3 | 6 | 5 | 4 | 8 | 7 | 3 | 5 | 16 | 29 | 15 | 20 | 14 |
| TUC | 4 | 5 | 14 | 13 | 16 | 5 | 29 | 8 | 7 | 8 | 3 | 2 | 3 | 7 | 10 | 14 | 15 | 9 | 3 | 16 | 50 | 18 | 31 | 27 |
| UPS | 3 | 3 | 17 | 23 | 5 | 9 | 5 | 20 | 8 | 5 | 3 | 2 | 11 | 13 | 21 | 39 | 16 | 10 | 8 | 17 | 53 | 38 | 40 | 12 |
| VAL | 2 | 4 | 8 | 9 | 6 | 5 | 13 | 6 | 4 | 10 | 9 | 6 | 6 | 6 | 8 | 13 | 15 | 6 | 8 | 16 | 32 | 27 | 19 | 12 |
| VIC | 9 | 7 | 34 | 15 | 20 | 15 | 31 | 18 | 8 | 11 | 3 | 2 | 3 | 5 | 9 | 5 | 11 | 6 | 6 | 12 | 38 | 29 | 43 | 30 |
| VSS | 2 | 4 | 12 | 11 | 4 | 9 | 6 | 5 | 5 | 10 | 10 | 9 | 11 | 12 | 9 | 18 | 14 | 17 | 5 | 16 | 62 | 16 | 32 | 21 |
| WNG | 3 | 4 | 11 | 30 | 6 | 9 | 7 | 18 | 6 | 5 | 3 | 3 | 9 | 11 | 17 | 32 | 18 | 10 | 8 | 17 | 37 | 40 | 27 | 11 |
| YKC | 19 | 64 | 71 | 113 | 137 | 148 | 249 | 152 | 181 | 52 | 44 | 43 | 51 | 55 | 23 | 66 | 38 | 35 | 13 | 27 | 60 | 85 | 243 | 29 |
- Date modified: