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 | 5 | 3 | 2 | 7 | 16 | 49 | 18 | 21 | 50 | 32 | 28 | 18 | 15 | 4 | 17 | 8 | 7 | 3 | 8 | 8 | 29 | 17 | 7 | 17 |
| ABG | 8 | 8 | 5 | 17 | 19 | 19 | 22 | 12 | 12 | 9 | 9 | 8 | 5 | 4 | 6 | 13 | 5 | 6 | 8 | 6 | 15 | 13 | 11 | 10 |
| ABK | 29 | 22 | 8 | 25 | 22 | 42 | 44 | 21 | 41 | 51 | 28 | 13 | 17 | 16 | 33 | 27 | 26 | 13 | 40 | 104 | 322 | 61 | 36 | 64 |
| AIA | 17 | 7 | 4 | 12 | 20 | 30 | 10 | 9 | 9 | 23 | 11 | 11 | 5 | 5 | 13 | 13 | 13 | 7 | 7 | 13 | 20 | 17 | 7 | 20 |
| AMS | 4 | 5 | 2 | 7 | 11 | 4 | 13 | 7 | 6 | 16 | 5 | 6 | 8 | 5 | 7 | 17 | 11 | 4 | 5 | 4 | 16 | 14 | 5 | 5 |
| API | 7 | 5 | 9 | 14 | 13 | 20 | 15 | 10 | 11 | 12 | 9 | 4 | 4 | 4 | 5 | 8 | 3 | 4 | 5 | 6 | 7 | 13 | 13 | 6 |
| AQU | 3 | 2 | 1 | 4 | 4 | 7 | 16 | 3 | 8 | 8 | 5 | 8 | 6 | 3 | 6 | 11 | 3 | 3 | 5 | 6 | 15 | 14 | 7 | 10 |
| ARS | ||||||||||||||||||||||||
| ASC | 4 | 4 | 1 | 4 | 4 | 4 | 12 | 9 | 6 | 4 | 15 | 4 | 6 | 5 | 4 | 7 | 4 | 8 | 6 | 3 | 6 | 4 | 6 | 13 |
| ASP | 3 | 7 | 4 | 6 | 12 | 6 | 6 | 3 | 5 | 11 | 4 | 5 | 6 | 2 | 5 | 10 | 4 | 2 | 2 | 2 | 3 | 7 | 3 | 4 |
| BDV | 2 | 2 | 1 | 3 | 3 | 3 | 13 | 4 | 5 | 3 | 4 | 5 | 9 | 5 | 4 | 11 | 4 | 2 | 5 | 4 | 9 | 10 | 5 | 5 |
| BEL | 7 | 3 | 4 | 4 | 10 | 3 | 11 | 9 | 6 | 6 | 4 | 6 | 12 | 10 | 9 | 16 | 8 | 4 | 6 | 5 | 23 | 6 | 8 | 4 |
| BFE | 14 | 7 | 4 | 4 | 11 | 6 | 12 | 10 | 10 | 9 | 5 | 12 | 14 | 14 | 10 | 25 | 12 | 6 | 8 | 7 | 41 | 12 | 15 | 14 |
| BFO | ||||||||||||||||||||||||
| BLC | 54 | 46 | 18 | 18 | 299 | 417 | 173 | 82 | 71 | 93 | 64 | 36 | 64 | 96 | 108 | 80 | 43 | 55 | 109 | 134 | 151 | 121 | 84 | 70 |
| BMT | 5 | 9 | 12 | 9 | 5 | 10 | 9 | 7 | 7 | 5 | 5 | 5 | 7 | 4 | 3 | 9 | 3 | 3 | 4 | 2 | 3 | 2 | 3 | 3 |
| BNG | 4 | 4 | 2 | 5 | 4 | 15 | 14 | 7 | 9 | 10 | 11 | 10 | 3 | 7 | 16 | 10 | 8 | 3 | 10 | 5 | 25 | 14 | 7 | 19 |
| BOU | 6 | 1 | 1 | 2 | 6 | 11 | 4 | 10 | 13 | 8 | 4 | 3 | 5 | 4 | 8 | 10 | 4 | 8 | 3 | 5 | 5 | 10 | 9 | 8 |
| BOX | 11 | 4 | 1 | 3 | 6 | 10 | 8 | 3 | 8 | 9 | 9 | 8 | 10 | 7 | 19 | 11 | 2 | 5 | 12 | 31 | 19 | 14 | 6 | |
| BRW | 41 | 21 | 19 | 62 | 141 | 29 | 39 | 45 | 191 | 135 | 78 | 83 | 60 | 28 | 32 | 136 | 128 | 38 | 92 | 30 | 56 | 43 | 35 | 37 |
| BSL | 8 | 2 | 4 | 7 | 15 | 13 | 6 | 14 | 12 | 5 | 10 | 8 | 4 | 10 | 11 | 12 | 8 | 5 | 4 | 6 | 10 | 15 | 7 | 8 |
| CBB | 52 | 20 | 24 | 9 | 87 | 122 | 55 | 28 | 26 | 29 | 14 | 10 | 32 | 35 | 39 | 72 | 188 | 81 | 89 | 206 | 129 | 92 | 117 | 82 |
| CLF | 3 | 2 | 2 | 4 | 5 | 8 | 12 | 2 | 4 | 3 | 6 | 8 | 6 | 6 | 5 | 10 | 7 | 3 | 8 | 7 | 11 | 13 | 6 | 9 |
| CMO | 16 | 32 | 6 | 25 | 90 | 72 | 396 | 334 | 282 | 326 | 93 | 193 | 78 | 37 | 18 | 65 | 46 | 43 | 30 | 22 | 12 | 29 | 25 | 15 |
| CNB | 2 | 3 | 3 | 8 | 6 | 8 | 4 | 7 | 12 | 10 | 5 | 5 | 6 | 2 | 5 | 9 | 6 | 2 | 2 | 2 | 1 | 2 | 6 | 6 |
| CSY | ||||||||||||||||||||||||
| CTA | 4 | 3 | 2 | 7 | 15 | 4 | 7 | 2 | 7 | 12 | 5 | 5 | 7 | 4 | 6 | 12 | 5 | 4 | 3 | 1 | 7 | 12 | 4 | 3 |
| CZT | 6 | 2 | 2 | 2 | 4 | 6 | 4 | 4 | 3 | 4 | 3 | 5 | 6 | 4 | 2 | 7 | 4 | 3 | 3 | 6 | 6 | 6 | 2 | 7 |
| DLR | 10 | 4 | 3 | 8 | 14 | 17 | 7 | 10 | 12 | 7 | 9 | 6 | 4 | 6 | 8 | 8 | 3 | 4 | 4 | 6 | 10 | 14 | 6 | 10 |
| DOU | 6 | 4 | 3 | 4 | 4 | 6 | 17 | 4 | 4 | 6 | 4 | 10 | 6 | 7 | 8 | 10 | 7 | 3 | 8 | 8 | 12 | 12 | 6 | 11 |
| DRV | 125 | 60 | 105 | 153 | 84 | 82 | 86 | 48 | 115 | 66 | 34 | 36 | 33 | 42 | 35 | 66 | 76 | 46 | 40 | 34 | 51 | 55 | 50 | 102 |
| EBR | 6 | 3 | 2 | 7 | 10 | 18 | 19 | 4 | 11 | 9 | 5 | 9 | 7 | 7 | 13 | 16 | 8 | 5 | 8 | 17 | 25 | 18 | 12 | 20 |
| ESK | 6 | 6 | 2 | 2 | 7 | 9 | 13 | 4 | 5 | 6 | 5 | 6 | 5 | 7 | 13 | 14 | 7 | 3 | 9 | 6 | 10 | 10 | 5 | 13 |
| EUA | ||||||||||||||||||||||||
| EYR | 8 | 8 | 4 | 10 | 8 | 10 | 6 | 25 | 14 | 17 | 5 | 10 | 6 | 3 | 3 | 8 | 4 | 3 | 4 | 3 | 6 | 4 | 10 | 7 |
| FCC | 60 | 18 | 9 | 38 | 527 | 300 | 306 | 230 | 275 | 196 | 37 | 100 | 116 | 47 | 22 | 52 | 42 | 16 | 19 | 53 | 50 | 35 | 23 | 45 |
| FRD | 4 | 1 | 2 | 3 | 6 | 9 | 5 | 7 | 6 | 7 | 5 | 5 | 5 | 9 | 4 | 5 | 6 | 8 | 6 | 9 | 5 | 3 | 6 | 7 |
| FRN | 7 | 8 | 1 | 3 | 3 | 15 | 4 | 10 | 8 | 9 | 5 | 4 | 3 | 2 | 6 | 7 | 4 | 7 | 2 | 8 | 6 | 9 | 6 | 5 |
| FUR | 3 | 2 | 1 | 3 | 3 | 4 | 13 | 3 | 6 | 4 | 6 | 6 | 9 | 6 | 4 | 11 | 4 | 2 | 5 | 4 | 10 | 10 | 5 | 6 |
| GCK | ||||||||||||||||||||||||
| GDH | 30 | 14 | 14 | 18 | 72 | 79 | 51 | 80 | 66 | 66 | 131 | 279 | 139 | 79 | 185 | 68 | 112 | 166 | 89 | 42 | 64 | 66 | 34 | 146 |
| GNA | 4 | 8 | 12 | 21 | 12 | 5 | 21 | 11 | 17 | 21 | 2 | 9 | 4 | 4 | 5 | 14 | 8 | 6 | 4 | 3 | 15 | 15 | 5 | 5 |
| GUA | 17 | 7 | 14 | 14 | 26 | 21 | 29 | 13 | 6 | 10 | 6 | 4 | 8 | 6 | 5 | 14 | 4 | 4 | 4 | 2 | 4 | 7 | 14 | 10 |
| GUI | 5 | 2 | 1 | 5 | 5 | 8 | 15 | 3 | 3 | 5 | 11 | 12 | 1 | 7 | 4 | 7 | 4 | 5 | 5 | 5 | 9 | 5 | 7 | 13 |
| GZH | 6 | 8 | 2 | 7 | 12 | 10 | 17 | 8 | 6 | 6 | 5 | 6 | 8 | 6 | 4 | 12 | 6 | 2 | 4 | 2 | 6 | 1 | 4 | 3 |
| HAD | 6 | 4 | 2 | 4 | 10 | 9 | 15 | 3 | 5 | 4 | 8 | 6 | 4 | 5 | 8 | 17 | 8 | 4 | 9 | 10 | 16 | 13 | 7 | 12 |
| HBK | 2 | 3 | 3 | 3 | 3 | 7 | 9 | 4 | 10 | 6 | 4 | 5 | 5 | 7 | 4 | 8 | 5 | 5 | 4 | 4 | 10 | 5 | 7 | 9 |
| HER | 3 | 2 | 1 | 3 | 2 | 7 | 16 | 4 | 7 | 10 | 20 | 5 | 1 | 3 | 6 | 8 | 4 | 5 | 4 | 2 | 8 | 5 | 3 | 10 |
| HLP | 9 | 5 | 2 | 3 | 7 | 5 | 12 | 7 | 8 | 7 | 5 | 12 | 13 | 13 | 8 | 21 | 7 | 5 | 6 | 5 | 29 | 9 | 11 | 10 |
| HON | 3 | 3 | 4 | 11 | 11 | 16 | 10 | 11 | 8 | 10 | 8 | 2 | 2 | 3 | 2 | 7 | 6 | 3 | 3 | 5 | 12 | 4 | 9 | 4 |
| HRB | 3 | 2 | 1 | 3 | 4 | 3 | 12 | 7 | 5 | 5 | 3 | 6 | 6 | 7 | 3 | 9 | 3 | 2 | 5 | 5 | 11 | 9 | 5 | 5 |
| HRN | 100 | 60 | 22 | 135 | 102 | 117 | 48 | 52 | 159 | 80 | 108 | 131 | 107 | 78 | 96 | 88 | 39 | 50 | 29 | 75 | 251 | 164 | 40 | 92 |
| HUA | 10 | 4 | 4 | 14 | 18 | 20 | 4 | 11 | 7 | 6 | 11 | 17 | 26 | 54 | 44 | 33 | 42 | 41 | 34 | 27 | 32 | 12 | 10 | 10 |
| HYB | ||||||||||||||||||||||||
| IPM | ||||||||||||||||||||||||
| IQA | 75 | 31 | 18 | 32 | 176 | 475 | 68 | 97 | 67 | 69 | 96 | 134 | 96 | 89 | 62 | 44 | 83 | 66 | 282 | 109 | 177 | 169 | 53 | 28 |
| IRT | 8 | 8 | 3 | 8 | 11 | 5 | 7 | 16 | 8 | 7 | 5 | 4 | 6 | 3 | 5 | 15 | 6 | 2 | 4 | 5 | 4 | 4 | 2 | 7 |
| IZN | ||||||||||||||||||||||||
| KAK | 6 | 11 | 18 | 12 | 16 | 11 | 11 | 7 | 7 | 11 | 6 | 6 | 9 | 7 | 5 | 13 | 6 | 3 | 5 | 3 | 4 | 4 | 11 | 12 |
| KDU | 8 | 3 | 3 | 6 | 21 | 11 | 16 | 5 | 7 | 15 | 6 | 5 | 9 | 5 | 6 | 15 | 6 | 5 | 2 | 1 | 5 | 10 | 7 | 3 |
| KMH | ||||||||||||||||||||||||
| KNY | 10 | 3 | 6 | 13 | 13 | 6 | 10 | 5 | 6 | 11 | 7 | 6 | 10 | 6 | 5 | 14 | 7 | 4 | 5 | 2 | 6 | 5 | 4 | 9 |
| KOU | 5 | 3 | 2 | 7 | 11 | 6 | 8 | 13 | 4 | 3 | 11 | 4 | 11 | 14 | 6 | 5 | 3 | 8 | 9 | 13 | 11 | 4 | 5 | 6 |
| LER | 24 | 15 | 4 | 8 | 6 | 32 | 7 | 5 | 10 | 14 | 13 | 4 | 2 | 12 | 14 | 26 | 16 | 5 | 7 | 19 | 24 | 9 | 5 | 38 |
| LRM | 10 | 7 | 27 | 24 | 23 | 17 | 7 | 13 | 13 | 23 | 11 | 12 | 13 | 3 | 8 | 26 | 9 | 7 | 3 | 3 | 8 | 10 | 9 | 6 |
| LVV | 6 | 3 | 4 | 5 | 9 | 5 | 15 | 9 | 6 | 8 | 7 | 10 | 12 | 11 | 8 | 14 | 7 | 6 | 7 | 7 | 22 | 5 | 9 | 6 |
| LYC | ||||||||||||||||||||||||
| LZH | 4 | 3 | 9 | 11 | 12 | 7 | 4 | 5 | 6 | 11 | 8 | 5 | 8 | 6 | 3 | 9 | 4 | 5 | 5 | 2 | 5 | 4 | 5 | 2 |
| MAB | ||||||||||||||||||||||||
| MAW | ||||||||||||||||||||||||
| MBO | 4 | 2 | 2 | 6 | 8 | 6 | 18 | 5 | 3 | 14 | 25 | 11 | 6 | 6 | 13 | 8 | 6 | 3 | 10 | 6 | 10 | 7 | 8 | 16 |
| MCQ | 18 | 19 | 16 | 43 | 37 | 77 | 102 | 279 | 469 | 141 | 181 | 296 | 138 | 66 | 78 | 146 | 62 | 28 | 31 | 26 | 26 | 25 | 13 | 13 |
| MEA | 28 | 19 | 5 | 20 | 62 | 81 | 156 | 214 | 267 | 91 | 82 | 51 | 42 | 18 | 12 | 32 | 11 | 15 | 15 | 20 | 13 | 22 | 29 | 25 |
| MGD | ||||||||||||||||||||||||
| MID | ||||||||||||||||||||||||
| MMB | 5 | 8 | 11 | 8 | 14 | 11 | 3 | 5 | 10 | 9 | 5 | 5 | 7 | 5 | 4 | 12 | 3 | 3 | 4 | 3 | 3 | 3 | 12 | 11 |
| NAQ | 109 | 57 | 37 | 68 | 204 | 130 | 526 | 757 | 199 | 97 | 66 | 51 | 56 | 34 | 50 | 59 | 70 | 38 | 53 | 31 | 113 | 27 | 52 | 148 |
| NCK | 3 | 2 | 1 | 3 | 2 | 3 | 12 | 5 | 6 | 5 | 2 | 6 | 7 | 6 | 2 | 10 | 3 | 2 | 4 | 4 | 10 | 9 | 5 | 6 |
| NEW | 10 | 2 | 3 | 4 | 6 | 14 | 22 | 35 | 40 | 18 | 10 | 5 | 12 | 3 | 7 | 8 | 6 | 5 | 6 | 7 | 6 | 10 | 12 | 11 |
| NGK | 2 | 3 | 1 | 2 | 3 | 3 | 11 | 4 | 4 | 3 | 2 | 4 | 9 | 8 | 4 | 11 | 5 | 3 | 6 | 2 | 4 | 8 | 3 | 3 |
| NUR | 22 | 6 | 2 | 6 | 10 | 13 | 7 | 5 | 13 | 15 | 13 | 11 | 10 | 15 | 13 | 27 | 13 | 6 | 5 | 23 | 53 | 34 | 15 | 22 |
| NVS | 4 | 4 | 4 | 7 | 9 | 8 | 5 | 6 | 16 | 6 | 16 | 3 | 6 | 3 | 3 | 10 | 4 | 4 | 2 | 6 | 8 | 7 | 6 | 5 |
| OTT | 10 | 4 | 3 | 6 | 34 | 18 | 30 | 14 | 35 | 24 | 6 | 8 | 6 | 13 | 10 | 11 | 6 | 9 | 13 | 22 | 13 | 12 | 13 | 11 |
| PAF | 7 | 11 | 5 | 2 | 5 | 12 | 4 | 3 | 8 | 8 | 8 | 3 | 2 | 4 | 3 | 12 | 6 | 2 | 2 | 14 | 36 | 15 | 10 | 13 |
| PAG | ||||||||||||||||||||||||
| PEG | ||||||||||||||||||||||||
| PHU | 7 | 17 | 6 | 10 | 22 | 14 | 21 | 8 | 8 | 11 | 11 | 8 | 10 | 8 | 5 | 16 | 8 | 3 | 6 | 2 | 10 | 4 | 5 | 4 |
| PPT | 5 | 3 | 3 | 8 | 10 | 15 | 11 | 13 | 9 | 5 | 8 | 2 | 1 | 4 | 4 | 9 | 10 | 2 | 9 | 6 | 11 | 6 | 4 | 12 |
| PST | ||||||||||||||||||||||||
| QSB | 4 | 2 | 1 | 4 | 9 | 4 | 21 | 4 | 5 | 18 | 11 | 6 | 3 | 3 | 7 | 8 | 4 | 4 | 4 | 6 | 18 | 13 | 6 | 9 |
| RES | 19 | 27 | 19 | 25 | 43 | 24 | 20 | 15 | 17 | 12 | 9 | 15 | 15 | 42 | 72 | 21 | 116 | 171 | 112 | 117 | 51 | 63 | 51 | 46 |
| SBA | 48 | 16 | 17 | 26 | 37 | 55 | 45 | 25 | 44 | 29 | 23 | 25 | 17 | 37 | 36 | 26 | 35 | 38 | 31 | 29 | 33 | 59 | 47 | 34 |
| SFS | ||||||||||||||||||||||||
| SHU | ||||||||||||||||||||||||
| SIT | 13 | 7 | 4 | 18 | 22 | 46 | 36 | 245 | 215 | 63 | 61 | 46 | 42 | 11 | 11 | 24 | 18 | 8 | 13 | 7 | 12 | 7 | 12 | 14 |
| SJG | 6 | 3 | 2 | 6 | 10 | 10 | 4 | 11 | 3 | 5 | 2 | 10 | 1 | 4 | 3 | 6 | 10 | 5 | 5 | 5 | 12 | 5 | 3 | 5 |
| SOD | 67 | 20 | 6 | 20 | 12 | 25 | 21 | 11 | 43 | 37 | 27 | 14 | 15 | 18 | 34 | 57 | 15 | 9 | 22 | 72 | 324 | 78 | 49 | 78 |
| SPT | 4 | 2 | 1 | 5 | 5 | 11 | 14 | 3 | 6 | 3 | 7 | 7 | 9 | 3 | 9 | 9 | 7 | 3 | 5 | 7 | 14 | 15 | 6 | 13 |
| STJ | 11 | 9 | 5 | 15 | 30 | 28 | 21 | 22 | 33 | 23 | 17 | 24 | 15 | 13 | 14 | 15 | 15 | 12 | 26 | 29 | 32 | 13 | 14 | 27 |
| SUA | ||||||||||||||||||||||||
| TAM | 4 | 3 | 1 | 5 | 4 | 9 | 20 | 5 | 9 | 15 | 10 | 9 | 2 | 3 | 12 | 9 | 7 | 6 | 5 | 7 | 20 | 13 | 8 | 17 |
| TAN | ||||||||||||||||||||||||
| TDC | ||||||||||||||||||||||||
| THL | 12 | 10 | 11 | 40 | 46 | 14 | 19 | 17 | 15 | 14 | 20 | 18 | 32 | 76 | 78 | 29 | 74 | 69 | 38 | 35 | 49 | 20 | 26 | 25 |
| THY | 3 | 2 | 1 | 3 | 3 | 3 | 13 | 6 | 5 | 5 | 3 | 5 | 6 | 5 | 2 | 10 | 3 | 2 | 5 | 4 | 11 | 10 | 5 | 6 |
| TRW | 11 | 4 | 2 | 6 | 12 | 9 | 5 | 8 | 3 | 3 | 5 | 6 | 8 | 3 | 7 | 15 | 9 | 6 | 6 | 4 | 7 | 7 | 4 | 6 |
| TSU | 2 | 1 | 1 | 1 | 2 | 6 | 6 | 2 | 7 | 4 | 4 | 11 | 7 | 2 | 5 | 8 | 5 | 2 | 2 | 3 | 8 | 5 | 3 | 7 |
| TUC | 8 | 5 | 1 | 4 | 4 | 14 | 4 | 7 | 7 | 8 | 6 | 3 | 4 | 3 | 10 | 5 | 3 | 4 | 3 | 5 | 9 | 9 | 7 | 6 |
| UPS | 20 | 8 | 2 | 4 | 8 | 14 | 9 | 4 | 8 | 12 | 9 | 9 | 7 | 16 | 12 | 24 | 13 | 6 | 5 | 19 | 36 | 23 | 13 | 22 |
| VAL | 10 | 5 | 2 | 5 | 17 | 10 | 13 | 8 | 8 | 4 | 14 | 4 | 3 | 2 | 9 | 20 | 5 | 4 | 10 | 12 | 26 | 19 | 6 | 15 |
| VIC | 14 | 7 | 3 | 5 | 14 | 15 | 20 | 19 | 32 | 13 | 7 | 8 | 10 | 4 | 6 | 7 | 7 | 8 | 10 | 7 | 6 | 11 | 11 | 14 |
| VSS | 5 | 4 | 1 | 5 | 9 | 6 | 4 | 7 | 3 | 4 | 7 | 5 | 2 | 12 | 10 | 5 | 5 | 12 | 8 | 6 | 7 | 3 | 6 | 7 |
| WNG | 12 | 5 | 3 | 4 | 9 | 4 | 15 | 7 | 7 | 7 | 6 | 9 | 10 | 13 | 6 | 25 | 11 | 5 | 8 | 6 | 35 | 11 | 13 | 11 |
| YKC | 39 | 14 | 12 | 38 | 370 | 251 | 462 | 138 | 169 | 167 | 61 | 59 | 107 | 49 | 66 | 58 | 33 | 25 | 18 | 38 | 44 | 42 | 22 | 33 |
- Date modified: