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 | 3 | 6 | 10 | 9 | 8 | 8 | 16 | 5 | 7 | 10 | 4 | 3 | 5 | 5 | 5 | 5 | 4 | 4 | 3 | 2 | 3 | 4 | 3 |
| ABG | 3 | 8 | 4 | 7 | 6 | 19 | 19 | 8 | 12 | 9 | 2 | 5 | 6 | 4 | 2 | 4 | 3 | 3 | 1 | 3 | 1 | 2 | 1 | 2 |
| ABK | 19 | 11 | 14 | 16 | 22 | 27 | 38 | 35 | 57 | 34 | 35 | 19 | 13 | 12 | 11 | 17 | 30 | 25 | 14 | 55 | 40 | 14 | 25 | 24 |
| AIA | 4 | 6 | 5 | 37 | 11 | 11 | 29 | 16 | 32 | 17 | 8 | 10 | 9 | 10 | 3 | 12 | 14 | 7 | 8 | 2 | 5 | 3 | 10 | 8 |
| AMS | 3 | 2 | 11 | 13 | 8 | 12 | 7 | 23 | 26 | 12 | 10 | 21 | 3 | 9 | 3 | 3 | 4 | 6 | 3 | 8 | 4 | 2 | 11 | 8 |
| API | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 1 |
| AQU | 5 | 2 | 5 | 13 | 6 | 17 | 10 | 6 | 17 | 10 | 14 | 9 | 6 | 4 | 6 | 9 | 8 | 8 | 5 | 7 | 6 | 3 | 8 | 4 |
| ARS | ||||||||||||||||||||||||
| ASC | 3 | 2 | 3 | 3 | 4 | 9 | 6 | 5 | 6 | 10 | 5 | 5 | 7 | 3 | 8 | 12 | 13 | 2 | 5 | 4 | 2 | 1 | 2 | 1 |
| ASP | 8 | 12 | 21 | 17 | 17 | 6 | 11 | 7 | 17 | 9 | 10 | 11 | 7 | 5 | 2 | 2 | 3 | 7 | 5 | 2 | 4 | 6 | 7 | 14 |
| BDV | 5 | 3 | 6 | 17 | 8 | 22 | 10 | 5 | 21 | 8 | 15 | 13 | 7 | 3 | 6 | 9 | 10 | 8 | 5 | 11 | 9 | 3 | 11 | 7 |
| BEL | 7 | 4 | 7 | 17 | 10 | 21 | 11 | 5 | 26 | 9 | 17 | 10 | 5 | 4 | 10 | 10 | 9 | 9 | 6 | 11 | 9 | 4 | 10 | 7 |
| BFE | 8 | 5 | 7 | 23 | 11 | 30 | 12 | 6 | 36 | 14 | 15 | 14 | 8 | 5 | 6 | 9 | 10 | 10 | 7 | 19 | 11 | 6 | 19 | 13 |
| BFO | ||||||||||||||||||||||||
| BLC | 24 | 23 | 31 | 36 | 164 | 247 | 151 | 28 | 168 | 104 | 50 | 70 | 84 | 41 | 65 | 75 | 84 | 73 | 98 | 35 | 70 | 58 | 60 | 40 |
| BMT | 1 | 1 | 2 | 2 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 1 |
| BNG | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| BOU | 4 | 4 | 5 | 19 | 24 | 33 | 8 | 10 | 31 | 9 | 17 | 20 | 24 | 16 | 7 | 21 | 21 | 20 | 6 | 3 | 7 | 2 | 3 | 11 |
| BOX | 8 | 6 | 6 | 19 | 12 | 10 | 10 | 6 | 30 | 10 | 16 | 6 | 4 | 8 | 9 | 10 | 6 | 11 | 4 | 13 | 10 | 3 | 3 | 8 |
| BRW | 41 | 36 | 32 | 77 | 88 | 98 | 91 | 147 | 394 | 165 | 230 | 165 | 113 | 25 | 37 | 52 | 48 | 41 | 37 | 22 | 31 | 45 | 54 | 51 |
| BSL | 4 | 3 | 3 | 19 | 17 | 14 | 6 | 15 | 21 | 8 | 18 | 9 | 13 | 13 | 18 | 27 | 21 | 13 | 3 | 4 | 8 | 8 | 7 | 9 |
| CBB | 47 | 15 | 52 | 64 | 108 | 71 | 101 | 42 | 136 | 114 | 47 | 47 | 34 | 48 | 23 | 57 | 80 | 72 | 156 | 37 | 72 | 59 | 78 | 70 |
| CLF | 5 | 3 | 6 | 18 | 9 | 25 | 8 | 5 | 22 | 10 | 10 | 18 | 12 | 8 | 8 | 8 | 10 | 9 | 7 | 13 | 8 | 5 | 13 | 9 |
| CMO | 10 | 12 | 10 | 26 | 24 | 76 | 46 | 100 | 286 | 140 | 95 | 140 | 145 | 38 | 32 | 23 | 29 | 15 | 23 | 16 | 14 | 25 | 22 | 20 |
| CNB | 6 | 17 | 24 | 15 | 9 | 14 | 17 | 9 | 26 | 10 | 9 | 10 | 8 | 11 | 3 | 4 | 4 | 8 | 8 | 4 | 5 | 10 | 8 | 2 |
| CSY | ||||||||||||||||||||||||
| CTA | 10 | 22 | 14 | 16 | 15 | 12 | 15 | 7 | 15 | 6 | 8 | 5 | 6 | 6 | 2 | 3 | 3 | 6 | 6 | 3 | 4 | 14 | 11 | 6 |
| CZT | 5 | 3 | 4 | 18 | 5 | 6 | 25 | 32 | 50 | 21 | 8 | 16 | 9 | 11 | 4 | 5 | 5 | 9 | 3 | 14 | 8 | 3 | 5 | 4 |
| DLR | 3 | 3 | 4 | 12 | 10 | 14 | 4 | 4 | 16 | 6 | 10 | 8 | 17 | 18 | 4 | 26 | 25 | 17 | 6 | 5 | 3 | 3 | 5 | 9 |
| DOU | 6 | 3 | 6 | 19 | 9 | 27 | 7 | 6 | 26 | 10 | 11 | 17 | 13 | 6 | 8 | 7 | 11 | 9 | 5 | 14 | 9 | 5 | 15 | 11 |
| DRV | 76 | 74 | 149 | 69 | 62 | 80 | 71 | 34 | 118 | 43 | 79 | 35 | 32 | 13 | 34 | 23 | 19 | 23 | 14 | 18 | 19 | 21 | 38 | 31 |
| EBR | 1 | 0 | 1 | 2 | 1 | 4 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 2 | 2 | 1 | 2 | 1 | 0 | 2 | 1 |
| ESK | 6 | 4 | 6 | 24 | 15 | 31 | 6 | 7 | 36 | 13 | 14 | 14 | 14 | 13 | 5 | 12 | 11 | 8 | 6 | 19 | 11 | 6 | 20 | 13 |
| EUA | ||||||||||||||||||||||||
| EYR | 26 | 17 | 6 | 10 | 10 | 26 | 5 | 23 | 37 | 14 | 19 | 26 | 13 | 13 | 3 | 5 | 5 | 6 | 8 | 13 | 9 | 6 | 5 | 9 |
| FCC | 7 | 22 | 20 | 25 | 156 | 243 | 72 | 64 | 173 | 138 | 275 | 89 | 38 | 31 | 28 | 40 | 43 | 29 | 36 | 13 | 26 | 23 | 28 | 16 |
| FRD | 2 | 2 | 4 | 17 | 7 | 9 | 8 | 24 | 21 | 11 | 20 | 13 | 7 | 8 | 19 | 28 | 14 | 9 | 3 | 7 | 12 | 12 | 5 | 2 |
| FRN | 4 | 2 | 5 | 11 | 10 | 20 | 8 | 15 | 14 | 11 | 4 | 19 | 18 | 12 | 9 | 16 | 9 | 17 | 19 | 7 | 4 | 3 | 3 | 6 |
| FUR | 5 | 3 | 6 | 17 | 8 | 23 | 9 | 4 | 21 | 8 | 14 | 16 | 9 | 5 | 5 | 9 | 10 | 9 | 6 | 11 | 9 | 4 | 12 | 8 |
| GCK | ||||||||||||||||||||||||
| GDH | 45 | 28 | 30 | 68 | 120 | 53 | 69 | 84 | 339 | 133 | 95 | 127 | 103 | 93 | 42 | 66 | 85 | 44 | 51 | 26 | 23 | 30 | 15 | 30 |
| GNA | 15 | 7 | 9 | 18 | 27 | 12 | 11 | 13 | 16 | 9 | 19 | 20 | 14 | 4 | 4 | 4 | 4 | 13 | 8 | 9 | 8 | 7 | 7 | 13 |
| GUA | 10 | 4 | 4 | 7 | 16 | 5 | 5 | 1 | 7 | 3 | 3 | 2 | 2 | 3 | 2 | 3 | 2 | 2 | 3 | 5 | 2 | 4 | 4 | 4 |
| GUI | 4 | 2 | 4 | 7 | 8 | 19 | 8 | 6 | 6 | 9 | 6 | 20 | 15 | 13 | 1 | 6 | 15 | 11 | 8 | 6 | 4 | 2 | 4 | 3 |
| GZH | 0 | 1 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| HAD | 4 | 3 | 6 | 20 | 12 | 29 | 3 | 6 | 25 | 10 | 9 | 13 | 12 | 13 | 4 | 9 | 11 | 6 | 5 | 15 | 9 | 4 | 15 | 10 |
| HBK | 3 | 2 | 4 | 6 | 6 | 8 | 25 | 7 | 24 | 4 | 6 | 3 | 4 | 5 | 3 | 7 | 5 | 5 | 3 | 8 | 3 | 1 | 4 | 2 |
| HER | 3 | 2 | 3 | 6 | 4 | 8 | 20 | 8 | 22 | 5 | 3 | 6 | 5 | 5 | 2 | 6 | 5 | 5 | 3 | 9 | 3 | 1 | 6 | 4 |
| HLP | 7 | 5 | 7 | 17 | 10 | 17 | 15 | 10 | 28 | 10 | 19 | 13 | 5 | 7 | 7 | 14 | 9 | 9 | 6 | 12 | 11 | 5 | 10 | 4 |
| HON | 2 | 5 | 7 | 1 | 2 | 8 | 4 | 5 | 3 | 5 | 2 | 3 | 6 | 5 | 2 | 6 | 11 | 9 | 5 | 2 | 11 | 15 | 12 | 3 |
| HRB | 6 | 3 | 6 | 15 | 9 | 21 | 11 | 5 | 23 | 9 | 15 | 12 | 5 | 4 | 8 | 10 | 8 | 8 | 6 | 9 | 8 | 3 | 10 | 6 |
| HRN | 24 | 64 | 69 | 48 | 59 | 288 | 182 | 109 | 106 | 170 | 190 | 45 | 51 | 47 | 38 | 49 | 38 | 38 | 42 | 74 | 62 | 13 | 40 | 26 |
| HUA | 3 | 1 | 2 | 5 | 7 | 4 | 8 | 8 | 5 | 5 | 9 | 11 | 9 | 6 | 5 | 10 | 7 | 5 | 6 | 5 | 2 | 2 | 13 | 4 |
| HYB | ||||||||||||||||||||||||
| IPM | ||||||||||||||||||||||||
| IQA | 52 | 46 | 56 | 306 | 257 | 140 | 78 | 61 | 369 | 258 | 118 | 131 | 54 | 65 | 45 | 130 | 60 | 97 | 67 | 50 | 52 | 25 | 26 | 30 |
| IRT | 7 | 4 | 10 | 20 | 6 | 24 | 8 | 4 | 16 | 15 | 3 | 20 | 15 | 5 | 5 | 5 | 3 | 4 | 5 | 8 | 6 | 7 | 3 | 11 |
| IZN | ||||||||||||||||||||||||
| KAK | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 0 | 0 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 |
| KDU | 8 | 11 | 19 | 15 | 13 | 6 | 7 | 5 | 12 | 4 | 8 | 8 | 4 | 3 | 2 | 2 | 2 | 5 | 4 | 2 | 3 | 5 | 10 | 15 |
| KMH | ||||||||||||||||||||||||
| KNY | 1 | 1 | 1 | 2 | 0 | 1 | 2 | 1 | 1 | 1 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 |
| KOU | 4 | 2 | 2 | 1 | 6 | 10 | 4 | 8 | 6 | 4 | 4 | 4 | 12 | 11 | 8 | 8 | 9 | 6 | 7 | 11 | 3 | 3 | 3 | 2 |
| LER | 5 | 4 | 6 | 27 | 15 | 33 | 8 | 7 | 44 | 16 | 13 | 14 | 11 | 9 | 3 | 9 | 13 | 6 | 2 | 27 | 14 | 8 | 26 | 18 |
| LRM | 19 | 6 | 7 | 22 | 26 | 7 | 7 | 19 | 11 | 3 | 18 | 15 | 14 | 5 | 4 | 3 | 4 | 7 | 6 | 4 | 5 | 5 | 7 | 15 |
| LVV | 5 | 3 | 6 | 15 | 8 | 17 | 11 | 4 | 24 | 8 | 15 | 8 | 4 | 5 | 10 | 11 | 6 | 9 | 5 | 10 | 9 | 3 | 9 | 4 |
| LYC | ||||||||||||||||||||||||
| LZH | 8 | 5 | 9 | 21 | 11 | 20 | 5 | 9 | 8 | 11 | 3 | 9 | 9 | 4 | 4 | 4 | 3 | 3 | 5 | 6 | 3 | 2 | 3 | 5 |
| MAB | ||||||||||||||||||||||||
| MAW | ||||||||||||||||||||||||
| MBO | 4 | 2 | 4 | 5 | 9 | 16 | 7 | 10 | 6 | 6 | 8 | 16 | 12 | 14 | 5 | 10 | 22 | 11 | 5 | 2 | 3 | 2 | 3 | 3 |
| MCQ | 9 | 15 | 13 | 29 | 19 | 25 | 42 | 27 | 156 | 48 | 38 | 100 | 52 | 17 | 14 | 18 | 11 | 12 | 20 | 13 | 6 | 7 | 11 | 4 |
| MEA | 3 | 3 | 10 | 19 | 54 | 98 | 22 | 43 | 104 | 47 | 51 | 54 | 40 | 18 | 8 | 19 | 16 | 10 | 24 | 10 | 9 | 6 | 10 | 8 |
| MGD | ||||||||||||||||||||||||
| MID | ||||||||||||||||||||||||
| MMB | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 1 | 1 | 1 | 1 | 2 | 2 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 |
| NAQ | 29 | 22 | 20 | 107 | 157 | 252 | 226 | 202 | 180 | 132 | 70 | 24 | 27 | 29 | 16 | 27 | 18 | 24 | 22 | 6 | 12 | 7 | 36 | 38 |
| NCK | 6 | 3 | 5 | 14 | 9 | 20 | 10 | 5 | 21 | 9 | 14 | 11 | 5 | 4 | 7 | 9 | 8 | 7 | 5 | 9 | 7 | 4 | 9 | 5 |
| NEW | ||||||||||||||||||||||||
| NGK | 6 | 3 | 7 | 20 | 10 | 26 | 11 | 5 | 28 | 9 | 15 | 15 | 10 | 5 | 7 | 10 | 9 | 9 | 7 | 15 | 11 | 5 | 15 | 10 |
| NUR | 8 | 6 | 6 | 20 | 7 | 16 | 16 | 10 | 38 | 12 | 18 | 7 | 5 | 7 | 7 | 10 | 11 | 10 | 4 | 18 | 14 | 5 | 9 | 7 |
| NVS | 6 | 6 | 5 | 19 | 8 | 26 | 5 | 10 | 13 | 19 | 10 | 20 | 12 | 6 | 5 | 7 | 5 | 5 | 7 | 16 | 10 | 6 | 6 | 10 |
| OTT | 2 | 4 | 8 | 39 | 28 | 14 | 13 | 38 | 37 | 19 | 27 | 14 | 11 | 12 | 18 | 27 | 17 | 11 | 6 | 8 | 15 | 12 | 6 | 4 |
| PAF | 8 | 4 | 9 | 22 | 12 | 13 | 13 | 26 | 43 | 28 | 17 | 22 | 3 | 11 | 6 | 7 | 9 | 19 | 6 | 13 | 8 | 4 | 18 | 13 |
| PAG | ||||||||||||||||||||||||
| PEG | ||||||||||||||||||||||||
| PHU | 5 | 5 | 19 | 23 | 6 | 8 | 4 | 6 | 12 | 16 | 3 | 4 | 7 | 4 | 3 | 3 | 3 | 4 | 5 | 3 | 1 | 3 | 7 | 6 |
| PPT | 3 | 1 | 3 | 3 | 3 | 11 | 4 | 9 | 10 | 3 | 6 | 10 | 4 | 6 | 2 | 3 | 6 | 13 | 9 | 4 | 7 | 14 | 11 | 9 |
| PST | ||||||||||||||||||||||||
| QSB | 4 | 3 | 7 | 7 | 15 | 14 | 6 | 4 | 17 | 8 | 6 | 7 | 4 | 3 | 7 | 5 | 4 | 6 | 4 | 3 | 2 | 3 | 3 | 1 |
| RES | 102 | 27 | 63 | 56 | 41 | 58 | 97 | 41 | 115 | 109 | 35 | 70 | 27 | 65 | 37 | 146 | 62 | 148 | 140 | 120 | 82 | 22 | 30 | 34 |
| SBA | 69 | 24 | 51 | 42 | 47 | 71 | 60 | 40 | 134 | 41 | 72 | 39 | 35 | 72 | 29 | 55 | 30 | 35 | 53 | 46 | 55 | 26 | 47 | 49 |
| SFS | ||||||||||||||||||||||||
| SHU | ||||||||||||||||||||||||
| SIT | 5 | 3 | 13 | 13 | 27 | 42 | 31 | 55 | 141 | 39 | 36 | 60 | 42 | 16 | 10 | 10 | 8 | 10 | 22 | 11 | 5 | 15 | 10 | 5 |
| SJG | 2 | 2 | 2 | 5 | 8 | 6 | 4 | 11 | 6 | 4 | 7 | 9 | 5 | 5 | 12 | 16 | 9 | 5 | 3 | 10 | 13 | 7 | 4 | 1 |
| SOD | 12 | 11 | 10 | 21 | 13 | 15 | 24 | 25 | 51 | 19 | 27 | 14 | 9 | 9 | 10 | 12 | 24 | 18 | 10 | 41 | 29 | 6 | 11 | 17 |
| SPT | 4 | 2 | 5 | 12 | 9 | 21 | 3 | 7 | 8 | 6 | 10 | 18 | 12 | 8 | 5 | 6 | 12 | 10 | 6 | 8 | 5 | 2 | 8 | 5 |
| STJ | 4 | 6 | 4 | 24 | 26 | 30 | 6 | 22 | 24 | 8 | 16 | 19 | 8 | 10 | 15 | 21 | 10 | 6 | 10 | 4 | 9 | 8 | 6 | 4 |
| SUA | 9 | 11 | 7 | 4 | 4 | 10 | 10 | 5 | 7 | 5 | 8 | 6 | 3 | 7 | 4 | |||||||||
| TAM | 5 | 2 | 6 | 7 | 7 | 18 | 10 | 9 | 5 | 16 | 9 | 11 | 5 | 9 | 6 | 8 | 9 | 5 | 6 | 4 | 3 | 2 | 4 | 3 |
| TAN | ||||||||||||||||||||||||
| TDC | ||||||||||||||||||||||||
| THL | 13 | 47 | 50 | 66 | 44 | 81 | 79 | 65 | 98 | 84 | 68 | 38 | 23 | 101 | 94 | 117 | 205 | 186 | 71 | 44 | 31 | 22 | 25 | 19 |
| THY | 5 | 3 | 6 | 15 | 9 | 20 | 12 | 5 | 22 | 9 | 15 | 12 | 5 | 5 | 8 | 11 | 8 | 8 | 6 | 9 | 8 | 4 | 9 | 5 |
| TRW | 3 | 3 | 1 | 13 | 8 | 6 | 12 | 6 | 9 | 7 | 7 | 5 | 13 | 5 | 5 | 17 | 16 | 6 | 7 | 3 | 6 | 3 | 7 | 4 |
| TSU | 2 | 3 | 4 | 5 | 13 | 20 | 8 | 10 | 4 | 8 | 3 | 7 | 7 | 4 | 3 | 10 | 4 | 4 | 8 | 3 | 2 | 4 | 2 | |
| TUC | 2 | 3 | 4 | 13 | 11 | 18 | 6 | 6 | 16 | 7 | 8 | 15 | 18 | 18 | 7 | 12 | 17 | 23 | 13 | 2 | 2 | 2 | 3 | 8 |
| UPS | 7 | 5 | 6 | 20 | 6 | 20 | 16 | 10 | 36 | 11 | 16 | 11 | 6 | 5 | 5 | 11 | 12 | 8 | 4 | 17 | 12 | 5 | 13 | 7 |
| VAL | 4 | 4 | 5 | 20 | 15 | 33 | 3 | 10 | 27 | 10 | 9 | 10 | 13 | 15 | 2 | 8 | 12 | 6 | 4 | 16 | 8 | 4 | 15 | 9 |
| VIC | 5 | 3 | 9 | 14 | 16 | 37 | 15 | 30 | 31 | 28 | 12 | 34 | 32 | 12 | 8 | 13 | 10 | 12 | 20 | 5 | 4 | 4 | 2 | 5 |
| VSS | 3 | 2 | 2 | 6 | 5 | 8 | 6 | 4 | 6 | 2 | 11 | 9 | 3 | 6 | 11 | 5 | 5 | 5 | 5 | 3 | 1 | 2 | 6 | 3 |
| WNG | ||||||||||||||||||||||||
| YKC | 20 | 11 | 12 | 35 | 135 | 426 | 83 | 159 | 213 | 177 | 157 | 45 | 31 | 47 | 19 | 36 | 33 | 32 | 60 | 24 | 27 | 28 | 44 | 27 |
- Date modified: