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 | 3 | 9 | 10 | 12 | 24 | 32 | 38 | 54 | 48 | 63 | 10 | 14 | 47 | 39 | 7 | 15 | 32 | 13 | 3 | 3 | 7 | 10 | 11 | 9 |
| ABG | 7 | 7 | 14 | 17 | 5 | |||||||||||||||||||
| ABK | 11 | 42 | 46 | 30 | 30 | 28 | 14 | 14 | 54 | 61 | 39 | 95 | 185 | 147 | 74 | 113 | 336 | 86 | 29 | 45 | 240 | 225 | 158 | 182 |
| AIA | 5 | 11 | 12 | 20 | 11 | 14 | 6 | 7 | 17 | 17 | 15 | 8 | 35 | 13 | 13 | 11 | 4 | 11 | 6 | 8 | 8 | 25 | 16 | 13 |
| AMS | 2 | 4 | 5 | 13 | 6 | 7 | 6 | 19 | 15 | 23 | 14 | 10 | 34 | 30 | 7 | 7 | 35 | 11 | 3 | 4 | 16 | 24 | 23 | 6 |
| API | ||||||||||||||||||||||||
| AQU | 4 | 6 | 4 | 3 | 6 | 7 | 5 | 4 | 25 | 10 | 20 | 14 | 39 | 25 | 16 | 14 | 35 | 12 | 4 | 4 | 10 | 12 | 12 | 10 |
| ARS | ||||||||||||||||||||||||
| ASC | 3 | 4 | 5 | 6 | 6 | 9 | 8 | 7 | 12 | 11 | 5 | 22 | 25 | 24 | 20 | 14 | 8 | 10 | 3 | 2 | 7 | 13 | 4 | 10 |
| ASP | 6 | 9 | 10 | 14 | 7 | 13 | 7 | 10 | 33 | 15 | 20 | 11 | 18 | 39 | 20 | 6 | 2 | 5 | 3 | 7 | 3 | 9 | 14 | 3 |
| BDV | 4 | 7 | 5 | 4 | 5 | 10 | 5 | 4 | 31 | 11 | 19 | 8 | 31 | 15 | 13 | 20 | 33 | 14 | 5 | 5 | 16 | 20 | 13 | 11 |
| BEL | 5 | 10 | 10 | 4 | 3 | 14 | 5 | 7 | 38 | 20 | 20 | 12 | 34 | 12 | 17 | 23 | 36 | 16 | 8 | 6 | 24 | 34 | 14 | 12 |
| BFE | 6 | 12 | 11 | 6 | 7 | 14 | 5 | 6 | 46 | 26 | 16 | 23 | 33 | 20 | 25 | 27 | 42 | 16 | 10 | 8 | 23 | 45 | 17 | 16 |
| BFO | ||||||||||||||||||||||||
| BLC | 24 | 35 | 44 | 51 | 25 | 44 | 26 | 38 | 62 | 115 | 87 | 59 | 251 | 195 | 231 | 391 | 135 | 107 | 49 | 56 | 94 | 101 | 83 | 60 |
| BMT | 13 | 13 | 5 | 12 | 19 | 10 | 15 | 8 | 42 | 28 | 16 | 13 | 28 | 35 | 17 | 9 | 10 | 10 | 4 | 3 | 4 | 16 | 6 | 9 |
| BNG | 4 | 5 | 5 | 5 | 10 | 11 | 16 | 34 | 14 | 15 | 5 | 6 | 43 | 36 | 13 | 18 | 25 | 12 | 3 | 3 | 5 | 6 | 11 | 11 |
| BOU | 3 | 9 | 11 | 10 | 7 | 24 | 8 | 8 | 49 | 48 | 20 | 21 | 26 | 9 | 10 | 30 | 27 | 11 | 6 | 8 | 16 | 26 | 31 | 15 |
| BOX | 6 | 15 | 13 | 8 | 10 | 20 | 7 | 18 | 51 | 42 | 22 | 36 | 39 | 32 | 36 | 38 | 33 | 15 | 8 | 6 | 29 | 30 | 20 | 16 |
| BRW | 33 | 105 | 99 | 189 | 101 | 61 | 67 | 118 | 104 | 371 | 106 | 96 | 774 | 659 | 569 | 295 | 261 | 363 | 186 | 100 | 182 | 223 | 129 | 122 |
| BSL | 4 | 8 | 9 | 11 | 8 | 22 | 6 | 7 | 24 | 17 | 18 | 20 | 39 | 5 | 7 | 16 | 13 | 7 | 6 | 7 | 13 | 25 | 22 | 16 |
| CBB | 33 | 45 | 27 | 56 | 29 | 32 | 35 | 56 | 50 | 63 | 36 | 102 | 203 | 114 | 96 | 104 | 222 | 232 | 84 | 89 | 245 | 129 | 89 | 148 |
| CLF | 4 | 6 | 5 | 3 | 8 | 10 | 5 | 4 | 32 | 10 | 15 | 12 | 29 | 12 | 15 | 20 | 30 | 16 | 5 | 4 | 11 | 13 | 13 | 12 |
| CMO | 16 | 79 | 89 | 90 | 53 | 86 | 33 | 47 | 382 | 554 | 126 | 67 | 940 | 354 | 511 | 487 | 452 | 170 | 44 | 58 | 83 | 64 | 44 | 23 |
| CNB | 4 | 10 | 7 | 13 | 15 | 9 | 15 | 10 | 36 | 11 | 27 | 11 | 38 | 48 | 18 | 4 | 14 | 6 | 4 | 8 | 6 | 8 | 13 | 11 |
| CSY | ||||||||||||||||||||||||
| CTA | 6 | 8 | 10 | 10 | 4 | 12 | 7 | 10 | 33 | 14 | 21 | 12 | 20 | 39 | 18 | 4 | 5 | 4 | 4 | 8 | 4 | 5 | 14 | 6 |
| CZT | 3 | 6 | 12 | 8 | 3 | 6 | 5 | 7 | 12 | 9 | 13 | 17 | 16 | 25 | 23 | 28 | 27 | 12 | 3 | 4 | 14 | 17 | 19 | 10 |
| DLR | 3 | 7 | 8 | 11 | 7 | 22 | 6 | 8 | 33 | 28 | 20 | 21 | 25 | 8 | 7 | 20 | 14 | 7 | 6 | 6 | 10 | 24 | 23 | 15 |
| DOU | 6 | 8 | 5 | 5 | 10 | 11 | 5 | 6 | 35 | 11 | 13 | 11 | 33 | 11 | 18 | 25 | 34 | 16 | 6 | 5 | 10 | 13 | 17 | 14 |
| DRV | 44 | 129 | 144 | 127 | 77 | 49 | 76 | 56 | 56 | 23 | 55 | 13 | 138 | 87 | 71 | 35 | 65 | 46 | 33 | 32 | 65 | 88 | 48 | 42 |
| EBR | 4 | 4 | 4 | 5 | 10 | 14 | 11 | 8 | 27 | 16 | 16 | 25 | 33 | 24 | 26 | 30 | 43 | 15 | 10 | 15 | 9 | 12 | 11 | 11 |
| ESK | 8 | 11 | 9 | 5 | 13 | 13 | 6 | 9 | 44 | 15 | 11 | 15 | 39 | 24 | 26 | 41 | 49 | 20 | 13 | 10 | 13 | 19 | 24 | 20 |
| EUA | ||||||||||||||||||||||||
| EYR | 4 | 8 | 7 | 13 | 13 | 9 | 14 | 11 | 13 | 31 | 15 | 8 | 24 | 34 | 13 | 15 | 9 | 10 | 9 | 4 | 12 | 21 | 9 | 6 |
| FCC | 16 | 60 | 69 | 111 | 82 | 251 | 186 | 42 | 258 | 266 | 267 | 101 | 243 | 453 | 448 | 149 | 188 | 78 | 29 | 49 | 138 | 169 | 122 | 97 |
| FRD | 4 | 9 | 11 | 12 | 8 | 14 | 5 | 8 | 16 | 27 | 13 | 8 | 57 | 15 | 8 | 17 | 16 | 11 | 4 | 12 | 20 | 31 | 23 | 13 |
| FRN | 3 | 7 | 10 | 10 | 7 | 17 | 3 | 8 | 46 | 47 | 19 | 21 | 16 | 4 | 8 | 17 | 29 | 12 | 6 | 5 | 8 | 18 | 29 | 14 |
| FUR | 4 | 7 | 5 | 4 | 5 | 10 | 5 | 5 | 30 | 10 | 18 | 8 | 32 | 13 | 13 | 19 | 33 | 15 | 5 | 4 | 14 | 18 | 14 | 11 |
| GCK | ||||||||||||||||||||||||
| GDH | 37 | 31 | 27 | 50 | 23 | 37 | 23 | 44 | 114 | 63 | 150 | 84 | 285 | 151 | 485 | 341 | 238 | 151 | 66 | 81 | 70 | 68 | 56 | 56 |
| GNA | 2 | 13 | 7 | 14 | 10 | 6 | 9 | 12 | 23 | 18 | 17 | 10 | 30 | 38 | 18 | 8 | 7 | 6 | 3 | 6 | 3 | 12 | 6 | 6 |
| GUA | 19 | 13 | 22 | 16 | 11 | 14 | 5 | 12 | 21 | 7 | 11 | 6 | 11 | 26 | 10 | 3 | 3 | 5 | 5 | 6 | 8 | 8 | 24 | 17 |
| GUI | 3 | 5 | 3 | 5 | 7 | 8 | 8 | 6 | 14 | 11 | 11 | 19 | 35 | 26 | 18 | 9 | 18 | 9 | 7 | 3 | 5 | 11 | 8 | 11 |
| GZH | 6 | 16 | 10 | 17 | 12 | 11 | 7 | 10 | 45 | 24 | 13 | 12 | 28 | 28 | 15 | 6 | 13 | 8 | 3 | 5 | 2 | 14 | 4 | 8 |
| HAD | 6 | 7 | 6 | 5 | 9 | 11 | 7 | 6 | 35 | 10 | 9 | 8 | 30 | 9 | 16 | 28 | 31 | 17 | 8 | 6 | 11 | 13 | 15 | 14 |
| HBK | 4 | 5 | 7 | 5 | 10 | 7 | 5 | 7 | 19 | 12 | 6 | 10 | 36 | 33 | 9 | 14 | 21 | 14 | 3 | 3 | 6 | 6 | 10 | 12 |
| HER | 4 | 5 | 8 | 4 | 5 | 7 | 6 | 5 | 22 | 7 | 7 | 15 | 31 | 25 | 10 | 10 | 12 | 10 | 3 | 4 | 4 | 6 | 7 | 11 |
| HLP | 7 | 12 | 7 | 5 | 5 | 15 | 6 | 9 | 41 | 24 | 18 | 23 | 40 | 16 | 23 | 24 | 40 | 16 | 9 | 8 | 22 | 34 | 22 | 17 |
| HON | 3 | 7 | 8 | 12 | 4 | 6 | 3 | 4 | 3 | 6 | 5 | 4 | 16 | 8 | ||||||||||
| HRB | 4 | 8 | 6 | 3 | 5 | 11 | 5 | 6 | 29 | 10 | 20 | 7 | 33 | 15 | 12 | 19 | 36 | 13 | 5 | 4 | 16 | 21 | 14 | 11 |
| HRN | 27 | 54 | 72 | 85 | 63 | 98 | 37 | 48 | 260 | 266 | 205 | 221 | 403 | 73 | 66 | 67 | 194 | 63 | 39 | 31 | 44 | 288 | 241 | 90 |
| HUA | 3 | 9 | 10 | 12 | 7 | 22 | 3 | 10 | 12 | 15 | 12 | 20 | 22 | 38 | 26 | 64 | 66 | 37 | 30 | 25 | 34 | 50 | 8 | 11 |
| HYB | ||||||||||||||||||||||||
| IPM | ||||||||||||||||||||||||
| IQA | 24 | 33 | 26 | 53 | 22 | 27 | 35 | 75 | 99 | 239 | 209 | 116 | 101 | 187 | 406 | 191 | 166 | 196 | 141 | 109 | 167 | 44 | 24 | 84 |
| IRT | 7 | 16 | 6 | 9 | 11 | 8 | 15 | 21 | 36 | 38 | 20 | 13 | 30 | 48 | 16 | 11 | 11 | 8 | 4 | 3 | 5 | 15 | 6 | 8 |
| IZN | ||||||||||||||||||||||||
| KAK | 8 | 7 | 10 | 13 | 10 | 4 | 7 | 10 | 33 | 19 | 14 | 12 | 13 | 28 | 9 | 6 | 4 | 5 | 4 | 3 | 3 | 9 | 4 | 11 |
| KDU | 5 | 15 | 7 | 12 | 10 | 15 | 3 | 10 | 30 | 16 | 16 | 12 | 18 | 34 | 17 | 5 | 4 | 5 | 4 | 7 | 3 | 11 | 12 | 9 |
| KMH | ||||||||||||||||||||||||
| KNY | 4 | 10 | 8 | 9 | 9 | 5 | 11 | 12 | 39 | 22 | 16 | 12 | 18 | 30 | 12 | 7 | 4 | 6 | 4 | 3 | 3 | 10 | 4 | 7 |
| KOU | 0 | 11 | 8 | 7 | 5 | 7 | 15 | 22 | 4 | 10 | ||||||||||||||
| LER | 7 | 10 | 10 | 6 | 8 | 10 | 6 | 8 | 46 | 22 | 15 | 17 | 32 | 36 | 27 | 46 | 76 | 16 | 9 | 10 | 11 | 27 | 18 | 20 |
| LRM | 4 | 11 | 6 | 6 | 10 | 10 | 5 | 12 | 28 | 15 | 15 | 10 | 27 | 39 | 21 | 10 | 9 | 7 | 4 | 7 | 4 | 14 | 10 | 9 |
| LVV | 6 | 7 | 5 | 4 | 5 | 14 | 6 | 7 | 30 | 12 | 18 | 7 | 30 | 12 | 13 | 20 | 35 | 15 | 6 | 6 | 17 | 22 | 15 | 13 |
| LYC | ||||||||||||||||||||||||
| LZH | 9 | 13 | 5 | 9 | 16 | 9 | 14 | 10 | 39 | 24 | 13 | 10 | 32 | 29 | 16 | 8 | 15 | 10 | 4 | 2 | 3 | 17 | 6 | 7 |
| MAB | ||||||||||||||||||||||||
| MAW | ||||||||||||||||||||||||
| MBO | 4 | 6 | 3 | 4 | 7 | 9 | 6 | 13 | 8 | 10 | 6 | 21 | 38 | 29 | 18 | 10 | 14 | 8 | 9 | 4 | 9 | 14 | 6 | 11 |
| MCQ | 8 | 20 | 25 | 49 | 32 | 21 | 11 | 17 | 79 | 204 | 102 | 33 | 579 | 206 | 212 | 157 | 316 | 36 | 15 | 11 | 19 | 53 | 62 | 37 |
| MEA | 11 | 36 | 48 | 20 | 16 | 35 | 28 | 11 | 168 | 183 | 69 | 22 | 299 | 226 | 81 | 28 | 63 | 17 | 25 | 17 | 32 | 46 | 67 | 35 |
| MGD | ||||||||||||||||||||||||
| MID | ||||||||||||||||||||||||
| MMB | 7 | 7 | 13 | 18 | 13 | 6 | 13 | 10 | 37 | 22 | 18 | 14 | 18 | 40 | 14 | 11 | 6 | 6 | 4 | 3 | 7 | 10 | 10 | 11 |
| NAQ | 19 | 169 | 118 | 149 | 99 | 47 | 67 | 29 | 87 | 124 | 103 | 35 | 68 | 109 | 107 | 48 | 73 | 93 | 50 | 46 | 78 | 81 | 54 | 86 |
| NCK | 4 | 7 | 5 | 3 | 5 | 10 | 4 | 5 | 27 | 9 | 19 | 7 | 31 | 15 | 12 | 19 | 34 | 13 | 5 | 4 | 14 | 17 | 14 | 11 |
| NEW | ||||||||||||||||||||||||
| NGK | 6 | 10 | 8 | 6 | 5 | 12 | 4 | 5 | 38 | 17 | 15 | 11 | 30 | 12 | 16 | 25 | 38 | 16 | 7 | 6 | 21 | 32 | 16 | 14 |
| NUR | 6 | 14 | 13 | 7 | 6 | 20 | 8 | 7 | 49 | 38 | 23 | 36 | 48 | 28 | 33 | 35 | 57 | 14 | 7 | 7 | 29 | 46 | 16 | 16 |
| NVS | 4 | 11 | 8 | 14 | 5 | 10 | 14 | 29 | 28 | 35 | 20 | 21 | 34 | 31 | 11 | 14 | 13 | 12 | 5 | 4 | 8 | 17 | 7 | 7 |
| OTT | 5 | 12 | 15 | 15 | 11 | 12 | 7 | 8 | 49 | 58 | 8 | 8 | 75 | 29 | 15 | 26 | 35 | 20 | 6 | 18 | 38 | 55 | 40 | 16 |
| PAF | 3 | 8 | 11 | 18 | 9 | 15 | 12 | 25 | 17 | 21 | 16 | 26 | 16 | 66 | 28 | 25 | 11 | 10 | 4 | 3 | 37 | 32 | 43 | 17 |
| PAG | ||||||||||||||||||||||||
| PEG | ||||||||||||||||||||||||
| PHU | 6 | 20 | 14 | 20 | 13 | 14 | 8 | 11 | 48 | 23 | 12 | 11 | 34 | 28 | 17 | 6 | 17 | 9 | 3 | 5 | 2 | 17 | 5 | 7 |
| PPT | 7 | 8 | 4 | 10 | 2 | 7 | 4 | 7 | 12 | 20 | 5 | 9 | 10 | 6 | 6 | 6 | 9 | 5 | 11 | 14 | 9 | 14 | 5 | 12 |
| PST | ||||||||||||||||||||||||
| QSB | 5 | 8 | 9 | 6 | 6 | 12 | 8 | 18 | 32 | 14 | 13 | 9 | 57 | 23 | 9 | 14 | 48 | 15 | 6 | 4 | 13 | 17 | 17 | 12 |
| RES | 53 | 54 | 48 | 70 | 38 | 42 | 56 | 90 | 69 | 43 | 68 | 145 | 139 | 127 | 110 | 88 | 189 | 94 | 175 | 125 | 133 | 123 | 91 | 74 |
| SBA | 32 | 51 | 52 | 76 | 34 | 55 | 44 | 34 | 86 | 42 | 45 | 39 | 151 | 179 | 59 | 66 | 106 | 83 | 50 | 38 | 58 | 47 | 80 | 57 |
| SFS | ||||||||||||||||||||||||
| SHU | ||||||||||||||||||||||||
| SIT | 11 | 36 | 43 | 28 | 18 | 24 | 27 | 13 | 54 | 39 | 61 | 13 | 175 | 123 | 114 | 43 | 37 | 15 | 23 | 16 | 25 | 18 | 23 | 28 |
| SJG | 2 | 4 | 6 | 6 | 4 | 11 | 3 | 4 | 9 | 10 | 10 | 13 | 20 | 9 | 14 | 5 | 9 | 8 | 5 | 6 | 9 | 18 | 7 | 9 |
| SOD | 6 | 31 | 30 | 20 | 21 | 29 | 15 | 21 | 52 | 61 | 29 | 84 | 164 | 100 | 91 | 136 | 339 | 61 | 21 | 44 | 182 | 136 | 141 | 173 |
| SPT | 4 | 5 | 3 | 3 | 8 | 9 | 8 | 8 | 25 | 9 | 15 | 18 | 35 | 21 | 20 | 16 | 30 | 13 | 4 | 4 | 7 | 8 | 10 | 12 |
| STJ | 5 | 8 | 14 | 19 | 12 | 19 | 9 | 6 | 34 | 38 | 6 | 15 | 61 | 11 | 10 | 27 | 32 | 16 | 8 | 12 | 24 | 31 | 24 | 15 |
| SUA | ||||||||||||||||||||||||
| TAM | 4 | 6 | 3 | 4 | 8 | 8 | 9 | 19 | 11 | 9 | 4 | 13 | 40 | 28 | 12 | 18 | 23 | 12 | 5 | 4 | 6 | 8 | 10 | 12 |
| TAN | ||||||||||||||||||||||||
| TDC | ||||||||||||||||||||||||
| THL | 21 | 32 | 18 | 56 | 29 | 29 | 39 | 108 | 37 | 55 | 69 | 192 | 142 | 41 | 101 | 55 | 119 | 142 | 83 | 67 | 90 | 81 | 43 | 50 |
| THY | 5 | 8 | 6 | 4 | 6 | 11 | 5 | 5 | 30 | 10 | 21 | 9 | 36 | 17 | 14 | 20 | 40 | 15 | 5 | 4 | 15 | 18 | 17 | 12 |
| TRW | 3 | 7 | 10 | 14 | 8 | 16 | 3 | 6 | 7 | 8 | 12 | 12 | 29 | 11 | 24 | 10 | 10 | 7 | 5 | 4 | 4 | 20 | 14 | 11 |
| TSU | 4 | 5 | 6 | 4 | 9 | 10 | 10 | 9 | 25 | 11 | 7 | 15 | 42 | 35 | 12 | 10 | 22 | 14 | 3 | 3 | 5 | 7 | 10 | 12 |
| TUC | 4 | 7 | 8 | 11 | 7 | 21 | 5 | 8 | 43 | 41 | 19 | 20 | 19 | 8 | 8 | 22 | 24 | 10 | 3 | 5 | 10 | 21 | 25 | 13 |
| UPS | 6 | 12 | 10 | 5 | 4 | 16 | 6 | 7 | 46 | 30 | 20 | 28 | 41 | 29 | 28 | 28 | 54 | 12 | 7 | 7 | 21 | 42 | 16 | 16 |
| VAL | 5 | 6 | 6 | 3 | 9 | 11 | 7 | 7 | 34 | 11 | 7 | 7 | 28 | 9 | 12 | 28 | 28 | 15 | 9 | 6 | 8 | 8 | 14 | 13 |
| VIC | 9 | 17 | 26 | 10 | 7 | 21 | 13 | 10 | 46 | 66 | 16 | 21 | 27 | 19 | 16 | 13 | 40 | 15 | 16 | 8 | 18 | 14 | 31 | 25 |
| VSS | 3 | 7 | 8 | 9 | 7 | 14 | 5 | 5 | 12 | 16 | 9 | 22 | 19 | 11 | 11 | 15 | 23 | 9 | 11 | 7 | 11 | 21 | 8 | 14 |
| WNG | 7 | 12 | 10 | 7 | 5 | 13 | 5 | 6 | 40 | 22 | 12 | 15 | 30 | 16 | 20 | 27 | 39 | 18 | 9 | 8 | 23 | 41 | 17 | 17 |
| YKC | 9 | 85 | 106 | 52 | 41 | 240 | 144 | 22 | 578 | 367 | 248 | 70 | 377 | 609 | 522 | 233 | 464 | 85 | 58 | 42 | 44 | 48 | 71 | 62 |
- Date modified: