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 | 6 | 10 | 4 | 9 | 29 | 34 | 42 | 17 | 8 | 9 | 16 | 21 | 11 | 3 | 3 | 2 | 4 | 4 | 5 | 7 | 9 | 7 | 7 |
| ABG | 12 | 10 | 8 | 7 | 17 | 8 | 18 | 11 | 14 | 10 | 8 | 6 | 13 | 6 | 8 | 7 | 6 | 6 | 8 | 6 | 9 | 8 | 7 | 8 |
| ABK | 129 | 24 | 54 | 50 | 60 | 47 | 9 | 30 | 48 | 23 | 27 | 35 | 26 | 43 | 31 | 26 | 21 | 41 | 38 | 40 | 381 | 362 | 83 | 101 |
| AIA | 6 | 11 | 11 | 15 | 19 | 8 | 12 | 16 | 5 | 6 | 5 | 7 | 10 | 6 | 9 | 3 | 3 | 6 | 8 | 4 | 13 | 21 | 12 | 6 |
| AMS | 6 | 6 | 4 | 11 | 6 | 6 | 18 | 11 | 12 | 4 | 9 | 3 | 5 | 6 | 7 | 4 | 2 | 4 | 7 | 5 | 13 | 9 | 8 | 6 |
| API | 2 | 6 | 24 | 20 | 5 | 3 | 10 | 3 | 5 | 3 | 4 | 3 | 4 | 8 | 3 | 2 | 2 | 4 | 5 | 5 | 4 | 7 | 6 | 6 |
| AQU | 3 | 5 | 13 | 8 | 12 | 9 | 12 | 10 | 5 | 9 | 9 | 8 | 10 | 5 | 4 | 6 | 3 | 8 | 5 | 4 | 8 | 11 | 7 | 10 |
| ARS | ||||||||||||||||||||||||
| ASC | 3 | 7 | 8 | 5 | 7 | 2 | 3 | 9 | 3 | 4 | 7 | 8 | 11 | 6 | 3 | 7 | 7 | 2 | 7 | 2 | 9 | 8 | 5 | 2 |
| ASP | 2 | 5 | 13 | 13 | 9 | 9 | 12 | 14 | 10 | 6 | 6 | 4 | 8 | 11 | 5 | 2 | 1 | 6 | 2 | 3 | 2 | 10 | 10 | 6 |
| BDV | 4 | 4 | 14 | 8 | 13 | 12 | 12 | 7 | 4 | 7 | 11 | 8 | 11 | 7 | 9 | 3 | 5 | 7 | 6 | 4 | 12 | 15 | 6 | 12 |
| BEL | 6 | 6 | 17 | 10 | 12 | 12 | 15 | 12 | 9 | 5 | 11 | 14 | 9 | 9 | 7 | 4 | 9 | 6 | 7 | 5 | 17 | 22 | 8 | 16 |
| BFE | 8 | 6 | 20 | 11 | 17 | 12 | 14 | 6 | 15 | 8 | 8 | 13 | 8 | 16 | 7 | 3 | 10 | 9 | 8 | 6 | 21 | 27 | 8 | 18 |
| BFO | ||||||||||||||||||||||||
| BLC | 26 | 39 | 56 | 39 | 64 | 68 | 48 | 81 | 60 | 31 | 44 | 74 | 43 | 144 | 164 | 65 | 31 | 49 | 48 | 73 | 107 | 153 | 126 | 105 |
| BMT | 5 | 8 | 13 | 10 | 18 | 14 | 14 | 18 | 15 | 7 | 7 | 7 | 8 | 10 | 7 | 3 | 2 | 8 | 5 | 5 | 5 | 10 | 8 | 16 |
| BNG | 4 | 7 | 11 | 6 | 12 | 3 | 9 | 24 | 13 | 3 | 3 | 6 | 16 | 14 | 4 | 5 | 1 | 4 | 5 | 5 | 5 | 12 | 8 | 6 |
| BOU | 5 | 14 | 13 | 18 | 8 | 13 | 5 | 5 | 7 | 4 | 4 | 8 | 5 | 7 | 4 | 3 | 6 | 5 | 8 | 9 | 5 | 12 | 11 | 11 |
| BOX | 12 | 7 | 23 | 13 | 11 | 11 | 12 | 13 | 24 | 8 | 19 | 19 | 13 | 12 | 8 | 6 | 11 | 10 | 15 | 9 | 17 | 11 | 16 | 16 |
| BRW | 46 | 28 | 167 | 138 | 97 | 86 | 320 | 328 | 150 | 167 | 77 | 45 | 61 | 483 | 124 | 71 | 75 | 66 | 78 | 62 | 44 | 205 | 101 | 86 |
| BSL | 5 | 12 | 15 | 13 | 13 | 13 | 6 | 11 | 5 | 6 | 3 | 7 | 13 | 6 | 13 | 10 | 8 | 8 | 7 | 7 | 8 | 12 | 8 | 8 |
| CBB | 89 | 25 | 46 | 50 | 34 | 61 | 35 | 54 | 40 | 27 | 30 | 73 | 25 | 100 | 77 | 80 | 54 | 92 | 94 | 188 | 113 | 225 | 152 | 83 |
| CLF | 7 | 5 | 12 | 9 | 15 | 8 | 12 | 4 | 4 | 5 | 8 | 7 | 9 | 7 | 9 | 3 | 7 | 10 | 6 | 4 | 10 | 14 | 6 | 11 |
| CMO | 38 | 32 | 133 | 71 | 70 | 59 | 300 | 128 | 38 | 55 | 51 | 45 | 32 | 136 | 94 | 11 | 25 | 19 | 23 | 19 | 23 | 52 | 46 | 81 |
| CNB | 1 | 5 | 14 | 9 | 14 | 16 | 12 | 17 | 9 | 5 | 7 | 5 | 8 | 12 | 3 | 2 | 2 | 3 | 4 | 5 | 7 | 10 | 9 | 16 |
| CSY | ||||||||||||||||||||||||
| CTA | 5 | 11 | 17 | 15 | 10 | 4 | 13 | 11 | 9 | 4 | 6 | 4 | 8 | 10 | 4 | 2 | 1 | 5 | 2 | 4 | 4 | 8 | 6 | 6 |
| CZT | 5 | 4 | 7 | 6 | 11 | 9 | 18 | 4 | 11 | 4 | 7 | 5 | 4 | 3 | 4 | 4 | 1 | 6 | 10 | 6 | 17 | 23 | 8 | 14 |
| DLR | 6 | 14 | 14 | 14 | 10 | 12 | 3 | 8 | 6 | 5 | 3 | 6 | 5 | 5 | 2 | 6 | 3 | 7 | 7 | 8 | 8 | 11 | 7 | 8 |
| DOU | 8 | 5 | 15 | 11 | 15 | 10 | 14 | 5 | 6 | 6 | 8 | 9 | 11 | 9 | 10 | 2 | 9 | 11 | 8 | 4 | 11 | 20 | 9 | 12 |
| DRV | 31 | 53 | 49 | 46 | 30 | 24 | 43 | 52 | 12 | 13 | 14 | 12 | 43 | 77 | 12 | 10 | 16 | 13 | 23 | 33 | 27 | 36 | 47 | 91 |
| EBR | 5 | 6 | 12 | 8 | 19 | 8 | 14 | 8 | 10 | 8 | 10 | 14 | 9 | 8 | 4 | 11 | 8 | 13 | 9 | 14 | 7 | 14 | 7 | 10 |
| ESK | 11 | 7 | 17 | 17 | 23 | 8 | 14 | 7 | 11 | 11 | 12 | 8 | 8 | 16 | 15 | 6 | 15 | 13 | 14 | 7 | 17 | 36 | 9 | 15 |
| EUA | ||||||||||||||||||||||||
| EYR | 2 | 7 | 11 | 9 | 13 | 11 | 27 | 28 | 7 | 6 | 7 | 4 | 5 | 15 | 8 | 3 | 4 | 3 | 6 | 6 | 14 | 13 | 5 | 11 |
| FCC | 51 | 37 | 58 | 120 | 207 | 94 | 71 | 150 | 65 | 58 | 62 | 48 | 26 | 39 | 75 | 22 | 19 | 27 | 28 | 49 | 47 | 91 | 69 | 79 |
| FRD | 6 | 12 | 18 | 11 | 22 | 13 | 11 | 13 | 5 | 8 | 2 | 12 | 14 | 8 | 13 | 12 | 3 | 8 | 6 | 7 | 8 | 13 | 11 | 9 |
| FRN | 4 | 11 | 11 | 16 | 10 | 11 | 11 | 5 | 6 | 4 | 4 | 7 | 3 | 10 | 6 | 7 | 5 | 5 | 3 | 4 | 6 | 15 | 10 | 7 |
| FUR | 5 | 4 | 13 | 8 | 13 | 11 | 13 | 7 | 4 | 7 | 10 | 7 | 10 | 6 | 9 | 2 | 5 | 8 | 6 | 4 | 12 | 14 | 7 | 12 |
| GCK | ||||||||||||||||||||||||
| GDH | 17 | 24 | 29 | 24 | 88 | 41 | 59 | 21 | 99 | 73 | 71 | 46 | 61 | 51 | 39 | 59 | 81 | 95 | 51 | 78 | 75 | 169 | 61 | 47 |
| GNA | 2 | 6 | 15 | 16 | 11 | 11 | 13 | 19 | 6 | 6 | 4 | 4 | 8 | 10 | 7 | 3 | 1 | 9 | 5 | 3 | 4 | 7 | 5 | 3 |
| GUA | 13 | 14 | 17 | 26 | 21 | 12 | 15 | 7 | 8 | 2 | 5 | 3 | 6 | 6 | 3 | 1 | 1 | 5 | 1 | 2 | 4 | 12 | 14 | 13 |
| GUI | 3 | 6 | 10 | 8 | 9 | 5 | 6 | 4 | 8 | 14 | 19 | 14 | 7 | 9 | 2 | 7 | 8 | 16 | 7 | 3 | 7 | 10 | 6 | 6 |
| GZH | 11 | 18 | 10 | 6 | 8 | 5 | 16 | 11 | 13 | 6 | 3 | 4 | 7 | 6 | 7 | 2 | 2 | 6 | 3 | 4 | 3 | 7 | 4 | 6 |
| HAD | 9 | 5 | 12 | 11 | 18 | 8 | 11 | 4 | 8 | 7 | 6 | 6 | 6 | 11 | 14 | 7 | 9 | 9 | 8 | 5 | 11 | 21 | 7 | 12 |
| HBK | 4 | 6 | 8 | 5 | 13 | 2 | 11 | 5 | 12 | 8 | 5 | 5 | 10 | 4 | 10 | 7 | 3 | 3 | 6 | 5 | 6 | 16 | 6 | 8 |
| HER | 3 | 5 | 7 | 5 | 9 | 4 | 6 | 2 | 12 | 16 | 4 | 4 | 14 | 4 | 12 | 8 | 1 | 3 | 5 | 3 | 6 | 16 | 5 | 7 |
| HLP | 6 | 6 | 19 | 11 | 12 | 9 | 14 | 8 | 14 | 6 | 11 | 16 | 9 | 12 | 9 | 4 | 10 | 10 | 11 | 6 | 25 | 25 | 10 | 17 |
| HON | 2 | 5 | 21 | 21 | 6 | 3 | 10 | 3 | 5 | 2 | 5 | 3 | 4 | 8 | 3 | 1 | 1 | 4 | 6 | 3 | 2 | 7 | 5 | 4 |
| HRB | 4 | 5 | 15 | 8 | 11 | 11 | 12 | 10 | 5 | 10 | 11 | 7 | 12 | 6 | 7 | 4 | 5 | 7 | 7 | 4 | 13 | 15 | 8 | 12 |
| HRN | 27 | 36 | 51 | 55 | 181 | 91 | 62 | 38 | 63 | 70 | 97 | 112 | 52 | 67 | 40 | 33 | 20 | 59 | 162 | 165 | 22 | 251 | 30 | 56 |
| HUA | 4 | 9 | 19 | 13 | 5 | 7 | 6 | 12 | 6 | 5 | 5 | 16 | 18 | 27 | 20 | 6 | 20 | 26 | 7 | 14 | 35 | 12 | 11 | 7 |
| HYB | ||||||||||||||||||||||||
| IPM | ||||||||||||||||||||||||
| IQA | 67 | 71 | 63 | 53 | 340 | 107 | 80 | 43 | 101 | 118 | 73 | 71 | 65 | 39 | 52 | 63 | 59 | 121 | 93 | 114 | 157 | 213 | 116 | 97 |
| IRT | 8 | 8 | 18 | 12 | 18 | 22 | 17 | 33 | 19 | 7 | 8 | 5 | 10 | 13 | 7 | 3 | 4 | 9 | 9 | 10 | 16 | 11 | 11 | 8 |
| IZN | ||||||||||||||||||||||||
| KAK | 12 | 12 | 7 | 11 | 7 | 3 | 13 | 8 | 11 | 3 | 6 | 5 | 5 | 7 | 4 | 1 | 2 | 5 | 1 | 3 | 2 | 5 | 5 | 3 |
| KDU | 10 | 14 | 12 | 21 | 10 | 5 | 15 | 9 | 8 | 4 | 5 | 3 | 8 | 8 | 5 | 2 | 1 | 6 | 2 | 2 | 2 | 8 | 8 | 3 |
| KMH | ||||||||||||||||||||||||
| KNY | 13 | 14 | 8 | 6 | 7 | 3 | 12 | 9 | 12 | 3 | 6 | 4 | 6 | 8 | 5 | 2 | 2 | 6 | 1 | 3 | 3 | 7 | 6 | 6 |
| KOU | 2 | 8 | 11 | 10 | 5 | 4 | 2 | 10 | 3 | 5 | 5 | 7 | 4 | 8 | 3 | 2 | 3 | 6 | 6 | 8 | 15 | 4 | 6 | 4 |
| LER | 9 | 6 | 18 | 16 | 21 | 7 | 8 | 10 | 13 | 11 | 10 | 9 | 10 | 18 | 10 | 6 | 17 | 11 | 12 | 8 | 20 | 42 | 7 | 12 |
| LRM | 4 | 4 | 15 | 13 | 12 | 4 | 15 | 14 | 11 | 5 | 5 | 4 | 8 | 12 | 7 | 2 | 1 | 8 | 4 | 4 | 5 | 9 | 6 | 4 |
| LVV | 4 | 6 | 16 | 13 | 10 | 8 | 14 | 12 | 7 | 9 | 14 | 11 | 11 | 6 | 7 | 7 | 7 | 6 | 8 | 6 | 14 | 16 | 8 | 13 |
| LYC | ||||||||||||||||||||||||
| LZH | 4 | 7 | 12 | 9 | 13 | 7 | 12 | 21 | 12 | 6 | 5 | 5 | 7 | 6 | 7 | 3 | 2 | 8 | 5 | 5 | 6 | 7 | 4 | 10 |
| MAB | ||||||||||||||||||||||||
| MAW | ||||||||||||||||||||||||
| MBO | 3 | 7 | 12 | 8 | 9 | 3 | 4 | 16 | 13 | 10 | 10 | 10 | 9 | 7 | 8 | 9 | 7 | 14 | 3 | 4 | 9 | 9 | 8 | 5 |
| MCQ | 7 | 9 | 27 | 29 | 13 | 20 | 113 | 83 | 22 | 31 | 18 | 12 | 45 | 176 | 58 | 7 | 4 | 9 | 9 | 18 | 27 | 15 | 40 | 20 |
| MEA | 14 | 22 | 58 | 35 | 44 | 15 | 98 | 58 | 21 | 19 | 6 | 20 | 13 | 12 | 20 | 10 | 17 | 12 | 15 | 15 | 11 | 17 | 38 | 46 |
| MGD | ||||||||||||||||||||||||
| MID | ||||||||||||||||||||||||
| MMB | 8 | 13 | 8 | 8 | 9 | 6 | 21 | 13 | 14 | 4 | 7 | 5 | 7 | 11 | 5 | 3 | 3 | 7 | 2 | 5 | 3 | 7 | 7 | 8 |
| NAQ | 48 | 67 | 128 | 127 | 173 | 91 | 78 | 62 | 45 | 30 | 23 | 21 | 17 | 25 | 17 | 19 | 28 | 49 | 40 | 24 | 51 | 190 | 31 | 63 |
| NCK | 3 | 4 | 14 | 8 | 11 | 10 | 10 | 9 | 4 | 9 | 10 | 7 | 11 | 6 | 6 | 4 | 4 | 7 | 6 | 4 | 11 | 12 | 7 | 10 |
| NEW | 9 | 16 | 32 | 22 | 19 | 13 | 13 | 8 | 9 | 7 | 5 | 12 | 7 | 9 | 5 | 7 | 14 | 8 | 14 | 10 | 4 | 16 | 20 | 26 |
| NGK | 5 | 5 | 17 | 10 | 15 | 12 | 15 | 7 | 9 | 6 | 10 | 11 | 11 | 11 | 10 | 3 | 9 | 9 | 8 | 4 | 18 | 23 | 7 | 16 |
| NUR | 14 | 6 | 21 | 12 | 15 | 9 | 12 | 7 | 26 | 7 | 16 | 18 | 10 | 16 | 8 | 5 | 14 | 10 | 11 | 10 | 14 | 15 | 14 | 17 |
| NVS | 2 | 7 | 23 | 13 | 11 | 6 | 11 | 32 | 11 | 6 | 12 | 10 | 11 | 6 | 5 | 5 | 5 | 11 | 11 | 6 | 9 | 13 | 6 | 10 |
| OTT | 10 | 13 | 24 | 12 | 27 | 13 | 16 | 16 | 7 | 8 | 3 | 11 | 10 | 8 | 10 | 7 | 4 | 10 | 10 | 10 | 8 | 18 | 19 | 10 |
| PAF | 12 | 5 | 7 | 9 | 13 | 7 | 26 | 8 | 10 | 10 | 7 | 5 | 9 | 8 | 6 | 3 | 3 | 14 | 20 | 9 | 26 | 18 | 11 | 7 |
| PAG | ||||||||||||||||||||||||
| PEG | ||||||||||||||||||||||||
| PHU | 13 | 19 | 12 | 9 | 9 | 6 | 18 | 13 | 15 | 6 | 3 | 3 | 8 | 6 | 8 | 2 | 2 | 7 | 4 | 5 | 4 | 7 | 3 | 6 |
| PPT | 1 | 3 | 15 | 12 | 4 | 3 | 11 | 2 | 5 | 3 | 3 | 2 | 2 | 8 | 2 | 1 | 4 | 7 | 7 | 5 | 8 | 9 | 6 | 9 |
| PST | ||||||||||||||||||||||||
| QSB | 5 | 8 | 20 | 12 | 12 | 4 | 9 | 27 | 10 | 12 | 6 | 5 | 16 | 12 | 4 | 7 | 3 | 6 | 6 | 5 | 11 | 12 | 10 | 12 |
| RES | 46 | 26 | 46 | 57 | 29 | 59 | 38 | 30 | 31 | 51 | 29 | 41 | 33 | 30 | 123 | 95 | 87 | 226 | 35 | 116 | 46 | 109 | 94 | 72 |
| SBA | 15 | 15 | 50 | 55 | 41 | 47 | 117 | 84 | 26 | 36 | 25 | 29 | 20 | 46 | 65 | 27 | 32 | 25 | 23 | 30 | 12 | 28 | 83 | 50 |
| SFS | ||||||||||||||||||||||||
| SHU | ||||||||||||||||||||||||
| SIT | 14 | 22 | 47 | 12 | 37 | 13 | 46 | 63 | 6 | 14 | 9 | 13 | 8 | 15 | 14 | 4 | 14 | 10 | 10 | 8 | 8 | 18 | 17 | 39 |
| SJG | 2 | 8 | 9 | 9 | 7 | 4 | 1 | 8 | 3 | 5 | 3 | 1 | 2 | 7 | 6 | 5 | 1 | 8 | 6 | 3 | 14 | 3 | 4 | 4 |
| SOD | 103 | 10 | 39 | 24 | 27 | 25 | 9 | 17 | 38 | 18 | 25 | 31 | 22 | 31 | 24 | 16 | 18 | 28 | 24 | 33 | 292 | 321 | 40 | 90 |
| SPT | 5 | 6 | 12 | 9 | 13 | 6 | 8 | 7 | 4 | 7 | 8 | 11 | 8 | 4 | 4 | 4 | 7 | 13 | 3 | 4 | 5 | 11 | 7 | 9 |
| STJ | 10 | 8 | 14 | 21 | 7 | 7 | 7 | 7 | 10 | 10 | 8 | 12 | 6 | 7 | 9 | 8 | 4 | 12 | 15 | 8 | 8 | 15 | 13 | 6 |
| SUA | 4 | 9 | 17 | 9 | 10 | 9 | 11 | 16 | 5 | 17 | 11 | 7 | 16 | 5 | 4 | 6 | 3 | 7 | 6 | 5 | 16 | 13 | 9 | 13 |
| TAM | 2 | 7 | 13 | 8 | 12 | 4 | 4 | 25 | 16 | 10 | 7 | 3 | 13 | 12 | 10 | 13 | 9 | 10 | 3 | 4 | 6 | 10 | 8 | 8 |
| TAN | 4 | 6 | 7 | 5 | 9 | 3 | 6 | 11 | 12 | 9 | 6 | 6 | 11 | 3 | 10 | 3 | 2 | 2 | 4 | 4 | 8 | 9 | 6 | 7 |
| TDC | ||||||||||||||||||||||||
| THL | 38 | 20 | 22 | 46 | 38 | 37 | 37 | 33 | 65 | 98 | 43 | 61 | 28 | 38 | 105 | 33 | 78 | 41 | 41 | 30 | 13 | 81 | 50 | 55 |
| THY | 4 | 6 | 16 | 9 | 12 | 11 | 12 | 11 | 5 | 11 | 10 | 7 | 13 | 6 | 7 | 5 | 5 | 8 | 7 | 4 | 13 | 14 | 9 | 12 |
| TRW | 5 | 10 | 11 | 8 | 10 | 6 | 2 | 12 | 4 | 5 | 5 | 5 | 10 | 3 | 3 | 4 | 3 | 6 | 3 | 3 | 11 | 12 | 7 | 5 |
| TSU | 4 | 6 | 9 | 5 | 12 | 3 | 8 | 7 | 11 | 9 | 4 | 4 | 9 | 4 | 6 | 6 | 2 | 4 | 6 | 5 | 6 | 15 | 7 | 6 |
| TUC | 3 | 14 | 13 | 17 | 7 | 12 | 6 | 4 | 6 | 3 | 4 | 7 | 3 | 7 | 5 | 1 | 5 | 4 | 3 | 9 | 3 | 11 | 7 | 8 |
| UPS | 10 | 5 | 20 | 9 | 14 | 8 | 11 | 6 | 22 | 9 | 12 | 15 | 9 | 16 | 8 | 3 | 14 | 9 | 11 | 8 | 16 | 26 | 9 | 16 |
| VAL | 9 | 4 | 10 | 11 | 17 | 7 | 10 | 4 | 7 | 8 | 7 | 4 | 5 | 11 | 13 | 9 | 11 | 9 | 8 | 4 | 7 | 21 | 6 | 11 |
| VIC | 9 | 15 | 26 | 19 | 17 | 12 | 21 | 14 | 8 | 7 | 5 | 10 | 5 | 9 | 4 | 7 | 14 | 7 | 11 | 9 | 6 | 15 | 17 | 22 |
| VSS | 4 | 9 | 12 | 9 | 5 | 5 | 2 | 11 | 3 | 3 | 4 | 7 | 10 | 5 | 5 | 8 | 6 | 9 | 3 | 4 | 9 | 10 | 7 | 4 |
| WNG | 6 | 5 | 19 | 11 | 17 | 11 | 16 | 8 | 14 | 7 | 8 | 13 | 8 | 14 | 8 | 4 | 12 | 10 | 9 | 5 | 23 | 30 | 9 | 18 |
| YKC | 38 | 22 | 115 | 56 | 45 | 30 | 135 | 168 | 71 | 115 | 47 | 58 | 63 | 144 | 168 | 39 | 28 | 20 | 16 | 43 | 14 | 84 | 83 | 85 |
- Date modified: