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 | 1 | 1 | 1 | 3 | 5 | 9 | 4 | 6 | 5 | 11 | 5 | 6 | 2 | 2 | 4 | 2 | 1 | 1 | 1 | 1 | 4 | 1 | 1 | 2 |
| ABG | 3 | 6 | 9 | 9 | 13 | 9 | 4 | 5 | 9 | 4 | 5 | 5 | 4 | 4 | 8 | 3 | 3 | 3 | 2 | 3 | 6 | 3 | 4 | 2 |
| ABK | 38 | 19 | 6 | 19 | 20 | 33 | 43 | 18 | 30 | 55 | 20 | 20 | 21 | 12 | 21 | 28 | 23 | 17 | 43 | 130 | 280 | 48 | 23 | 82 |
| AIA | 6 | 3 | 4 | 6 | 19 | 16 | 14 | 3 | 11 | 24 | 10 | 5 | 7 | 2 | 6 | 8 | 8 | 3 | 4 | 9 | 8 | 5 | 3 | 6 |
| AMS | 3 | 3 | 2 | 6 | 6 | 3 | 8 | 7 | 5 | 11 | 4 | 4 | 4 | 3 | 7 | 13 | 8 | 2 | 3 | 4 | 16 | 14 | 5 | 6 |
| API | 3 | 2 | 3 | 5 | 2 | 4 | 3 | 3 | 4 | 7 | 3 | 2 | 3 | 2 | 3 | 1 | 3 | 2 | 2 | 2 | 5 | 1 | 3 | 2 |
| AQU | 1 | 1 | 1 | 1 | 2 | 3 | 3 | 3 | 8 | 4 | 4 | 5 | 5 | 3 | 1 | 7 | 1 | 1 | 2 | 1 | 3 | 2 | 3 | 2 |
| ARS | ||||||||||||||||||||||||
| ASC | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 2 | 2 |
| ASP | 1 | 9 | 8 | 3 | 4 | 4 | 5 | 8 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 4 |
| BDV | 2 | 1 | 1 | 1 | 3 | 3 | 1 | 5 | 5 | 2 | 4 | 2 | 6 | 4 | 7 | 8 | 3 | 1 | 2 | 3 | 8 | 2 | 1 | 5 |
| BEL | 6 | 3 | 3 | 2 | 5 | 2 | 3 | 9 | 6 | 4 | 4 | 4 | 8 | 8 | 11 | 12 | 6 | 3 | 3 | 4 | 14 | 5 | 4 | 5 |
| BFE | 13 | 6 | 3 | 1 | 6 | 7 | 6 | 8 | 5 | 5 | 4 | 6 | 9 | 12 | 9 | 20 | 11 | 4 | 4 | 6 | 34 | 14 | 10 | 14 |
| BFO | ||||||||||||||||||||||||
| BLC | 56 | 45 | 18 | 17 | 308 | 394 | 186 | 89 | 70 | 95 | 61 | 30 | 56 | 100 | 105 | 90 | 41 | 50 | 110 | 142 | 148 | 124 | 89 | 70 |
| BMT | 1 | 6 | 11 | 11 | 4 | 7 | 14 | 9 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 3 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 |
| BNG | 1 | 1 | 1 | 1 | 1 | 7 | 3 | 3 | 3 | 6 | 4 | 5 | 5 | 4 | 1 | 3 | 6 | 1 | 2 | 2 | 3 | 1 | 2 | 2 |
| BOU | 3 | 3 | 1 | 1 | 4 | 4 | 3 | 8 | 9 | 3 | 3 | 2 | 3 | 3 | 3 | 9 | 5 | 6 | 3 | 3 | 6 | 3 | 3 | 2 |
| BOX | 9 | 4 | 1 | 2 | 2 | 5 | 2 | 2 | 3 | 4 | 6 | 4 | 6 | 5 | 11 | 8 | 0 | 3 | 14 | 29 | 22 | 10 | 6 | |
| BRW | 35 | 17 | 13 | 32 | 126 | 19 | 41 | 47 | 175 | 149 | 77 | 104 | 71 | 30 | 34 | 148 | 122 | 75 | 65 | 21 | 32 | 35 | 32 | 34 |
| BSL | 5 | 3 | 3 | 3 | 8 | 5 | 5 | 8 | 10 | 2 | 5 | 5 | 1 | 4 | 10 | 5 | 5 | 3 | 3 | 3 | 6 | 9 | 4 | 4 |
| CBB | 52 | 19 | 22 | 11 | 88 | 127 | 57 | 28 | 24 | 27 | 15 | 9 | 32 | 32 | 41 | 71 | 194 | 87 | 84 | 214 | 123 | 89 | 110 | 78 |
| CLF | 1 | 2 | 1 | 1 | 2 | 3 | 1 | 2 | 2 | 2 | 8 | 4 | 2 | 6 | 9 | 7 | 4 | 1 | 5 | 1 | 3 | 2 | 1 | 4 |
| CMO | 20 | 33 | 5 | 11 | 82 | 91 | 368 | 376 | 292 | 267 | 57 | 212 | 103 | 26 | 36 | 93 | 44 | 36 | 24 | 28 | 18 | 27 | 21 | 17 |
| CNB | 3 | 4 | 5 | 9 | 8 | 7 | 2 | 7 | 17 | 16 | 5 | 6 | 2 | 2 | 2 | 8 | 4 | 5 | 2 | 2 | 5 | 8 | 2 | 3 |
| CSY | ||||||||||||||||||||||||
| CTA | 6 | 7 | 1 | 2 | 2 | 7 | 5 | 3 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 0 | 2 | 3 | 5 | 3 |
| CZT | 7 | 4 | 3 | 3 | 6 | 4 | 3 | 6 | 6 | 6 | 6 | 5 | 1 | 4 | 4 | 7 | 6 | 4 | 4 | 6 | 14 | 9 | 3 | 10 |
| DLR | 5 | 2 | 2 | 3 | 8 | 5 | 5 | 5 | 8 | 3 | 4 | 3 | 2 | 2 | 6 | 5 | 4 | 3 | 2 | 4 | 7 | 7 | 4 | 4 |
| DOU | 3 | 3 | 2 | 2 | 4 | 5 | 5 | 3 | 3 | 3 | 5 | 4 | 2 | 6 | 9 | 8 | 4 | 2 | 4 | 4 | 11 | 2 | 2 | 7 |
| DRV | 125 | 61 | 106 | 155 | 84 | 83 | 87 | 49 | 117 | 67 | 35 | 36 | 33 | 43 | 36 | 67 | 77 | 47 | 41 | 35 | 52 | 57 | 51 | 104 |
| EBR | 4 | 3 | 2 | 3 | 5 | 10 | 8 | 4 | 6 | 5 | 5 | 8 | 5 | 6 | 6 | 14 | 6 | 5 | 5 | 10 | 17 | 8 | 9 | 10 |
| ESK | 7 | 6 | 3 | 2 | 2 | 16 | 3 | 1 | 2 | 4 | 2 | 3 | 3 | 5 | 13 | 13 | 5 | 2 | 4 | 5 | 8 | 1 | 3 | 15 |
| EUA | ||||||||||||||||||||||||
| EYR | 4 | 4 | 4 | 7 | 7 | 10 | 6 | 18 | 9 | 10 | 10 | 7 | 4 | 3 | 3 | 10 | 2 | 5 | 2 | 4 | 4 | 2 | 8 | 4 |
| FCC | 65 | 25 | 9 | 37 | 505 | 313 | 298 | 232 | 284 | 202 | 40 | 100 | 129 | 45 | 22 | 44 | 39 | 15 | 17 | 41 | 48 | 28 | 20 | 42 |
| FRD | 4 | 3 | 1 | 2 | 9 | 2 | 5 | 4 | 2 | 7 | 4 | 1 | 2 | 4 | 1 | 4 | 1 | 6 | 3 | 6 | 4 | 3 | 5 | 3 |
| FRN | 5 | 4 | 1 | 1 | 2 | 4 | 2 | 4 | 3 | 1 | 1 | 2 | 2 | 4 | 2 | 8 | 6 | 6 | 2 | 6 | 1 | 4 | 2 | 2 |
| FUR | 1 | 1 | 0 | 1 | 2 | 2 | 1 | 4 | 5 | 2 | 6 | 1 | 5 | 6 | 6 | 10 | 3 | 1 | 2 | 2 | 6 | 2 | 1 | 4 |
| GCK | ||||||||||||||||||||||||
| GDH | 29 | 13 | 14 | 17 | 90 | 71 | 59 | 85 | 67 | 63 | 140 | 278 | 126 | 88 | 188 | 62 | 117 | 161 | 75 | 42 | 65 | 74 | 36 | 163 |
| GNA | 5 | 6 | 9 | 19 | 9 | 9 | 26 | 14 | 23 | 26 | 5 | 13 | 6 | 5 | 7 | 18 | 10 | 7 | 6 | 5 | 17 | 13 | 5 | 5 |
| GUA | 6 | 4 | 1 | 3 | 6 | 5 | 1 | 1 | 2 | 2 | 2 | 1 | 2 | 1 | 1 | 3 | 1 | 1 | 1 | 1 | 2 | 1 | 6 | 8 |
| GUI | 5 | 1 | 1 | 2 | 6 | 3 | 1 | 4 | 3 | 3 | 7 | 13 | 4 | 4 | 4 | 5 | 5 | 5 | 3 | 2 | 3 | 2 | 2 | 2 |
| GZH | 2 | 10 | 17 | 10 | 2 | 9 | 9 | 8 | 8 | 1 | 1 | 3 | 2 | 2 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 2 | 1 |
| HAD | 6 | 4 | 2 | 1 | 5 | 7 | 3 | 2 | 4 | 4 | 7 | 2 | 4 | 4 | 10 | 15 | 3 | 2 | 4 | 3 | 14 | 4 | 3 | 8 |
| HBK | 3 | 3 | 3 | 3 | 4 | 4 | 3 | 4 | 8 | 10 | 8 | 11 | 8 | 6 | 4 | 5 | 6 | 4 | 4 | 3 | 8 | 4 | 4 | 6 |
| HER | 3 | 3 | 2 | 4 | 5 | 10 | 25 | 4 | 5 | 12 | 22 | 8 | 2 | 4 | 9 | 9 | 7 | 5 | 8 | 6 | 14 | 9 | 6 | 18 |
| HLP | 8 | 4 | 1 | 3 | 3 | 5 | 5 | 6 | 6 | 4 | 3 | 7 | 9 | 10 | 6 | 16 | 6 | 3 | 4 | 5 | 21 | 10 | 7 | 9 |
| HON | 3 | 4 | 1 | 3 | 2 | 3 | 2 | 5 | 4 | 4 | 2 | 1 | 1 | 1 | 2 | 2 | 6 | 5 | 4 | 10 | 11 | 6 | 4 | 7 |
| HRB | 2 | 1 | 1 | 1 | 2 | 2 | 2 | 8 | 6 | 3 | 3 | 4 | 5 | 6 | 6 | 7 | 3 | 2 | 2 | 3 | 8 | 2 | 2 | 4 |
| HRN | 97 | 63 | 25 | 146 | 110 | 120 | 53 | 64 | 157 | 73 | 112 | 118 | 100 | 73 | 85 | 84 | 34 | 46 | 39 | 68 | 265 | 170 | 42 | 89 |
| HUA | 2 | 2 | 1 | 3 | 2 | 2 | 2 | 3 | 2 | 1 | 1 | 6 | 4 | 7 | 6 | 3 | 4 | 4 | 3 | 9 | 5 | 2 | 3 | 1 |
| HYB | ||||||||||||||||||||||||
| IPM | ||||||||||||||||||||||||
| IQA | 74 | 28 | 16 | 31 | 202 | 433 | 78 | 84 | 70 | 62 | 86 | 141 | 103 | 76 | 57 | 41 | 74 | 59 | 278 | 103 | 174 | 164 | 57 | 21 |
| IRT | 7 | 5 | 2 | 5 | 7 | 5 | 4 | 12 | 7 | 2 | 3 | 3 | 3 | 2 | 2 | 10 | 3 | 1 | 3 | 4 | 3 | 4 | 1 | 5 |
| IZN | ||||||||||||||||||||||||
| KAK | 5 | 7 | 11 | 6 | 9 | 5 | 2 | 1 | 3 | 9 | 4 | 4 | 5 | 3 | 3 | 9 | 3 | 3 | 3 | 2 | 2 | 2 | 9 | 9 |
| KDU | 11 | 16 | 6 | 2 | 4 | 5 | 5 | 5 | 9 | 5 | 3 | 2 | 2 | 1 | 1 | 3 | 2 | 2 | 1 | 1 | 2 | 2 | 5 | 1 |
| KMH | ||||||||||||||||||||||||
| KNY | 10 | 12 | 5 | 8 | 5 | 4 | 2 | 5 | 5 | 7 | 5 | 3 | 5 | 2 | 2 | 7 | 4 | 2 | 2 | 1 | 3 | 2 | 1 | 7 |
| KOU | 3 | 2 | 1 | 5 | 5 | 6 | 2 | 2 | 2 | 3 | 13 | 11 | 13 | 8 | 6 | 6 | 8 | 9 | 6 | 5 | 5 | 2 | 2 | 4 |
| LER | 24 | 16 | 5 | 9 | 4 | 36 | 8 | 6 | 11 | 11 | 15 | 6 | 5 | 8 | 12 | 27 | 21 | 5 | 9 | 23 | 31 | 15 | 5 | 44 |
| LRM | 8 | 8 | 25 | 24 | 18 | 7 | 18 | 19 | 14 | 14 | 7 | 10 | 8 | 2 | 6 | 22 | 7 | 6 | 2 | 2 | 9 | 9 | 6 | 5 |
| LVV | 5 | 4 | 5 | 3 | 6 | 5 | 6 | 10 | 6 | 8 | 7 | 10 | 11 | 10 | 10 | 12 | 6 | 7 | 6 | 5 | 17 | 10 | 6 | 6 |
| LYC | ||||||||||||||||||||||||
| LZH | 2 | 2 | 8 | 11 | 6 | 2 | 8 | 7 | 4 | 3 | 2 | 2 | 2 | 2 | 1 | 4 | 2 | 2 | 1 | 1 | 2 | 2 | 3 | 1 |
| MAB | ||||||||||||||||||||||||
| MAW | ||||||||||||||||||||||||
| MBO | 2 | 1 | 2 | 4 | 5 | 10 | 2 | 2 | 9 | 9 | 20 | 5 | 5 | 3 | 9 | 13 | 5 | 8 | 3 | 4 | 5 | 6 | 2 | 2 |
| MCQ | 14 | 15 | 13 | 32 | 32 | 59 | 104 | 222 | 361 | 127 | 148 | 238 | 119 | 56 | 56 | 103 | 50 | 23 | 26 | 21 | 21 | 22 | 12 | 11 |
| MEA | 24 | 18 | 3 | 15 | 50 | 72 | 113 | 208 | 249 | 69 | 57 | 38 | 39 | 15 | 7 | 25 | 9 | 12 | 10 | 16 | 14 | 16 | 17 | 13 |
| MGD | ||||||||||||||||||||||||
| MID | ||||||||||||||||||||||||
| MMB | 3 | 2 | 4 | 2 | 5 | 7 | 5 | 2 | 4 | 5 | 1 | 2 | 1 | 1 | 1 | 5 | 1 | 2 | 1 | 1 | 3 | 5 | 5 | 4 |
| NAQ | 99 | 67 | 38 | 47 | 170 | 137 | 539 | 727 | 200 | 61 | 60 | 43 | 46 | 28 | 41 | 53 | 57 | 26 | 33 | 33 | 100 | 21 | 44 | 134 |
| NCK | 1 | 1 | 1 | 1 | 2 | 2 | 1 | 6 | 6 | 2 | 2 | 2 | 5 | 5 | 5 | 7 | 2 | 1 | 2 | 2 | 6 | 1 | 1 | 3 |
| NEW | 5 | 4 | 2 | 3 | 8 | 12 | 14 | 35 | 35 | 14 | 9 | 4 | 10 | 4 | 2 | 4 | 4 | 4 | 3 | 3 | 5 | 3 | 5 | 3 |
| NGK | 4 | 3 | 1 | 1 | 5 | 7 | 4 | 6 | 5 | 5 | 3 | 3 | 7 | 7 | 7 | 8 | 5 | 4 | 4 | 7 | 16 | 3 | 3 | 8 |
| NUR | 20 | 6 | 2 | 5 | 5 | 8 | 6 | 5 | 8 | 9 | 10 | 6 | 5 | 10 | 11 | 24 | 10 | 5 | 4 | 24 | 58 | 38 | 12 | 19 |
| NVS | 3 | 4 | 4 | 3 | 4 | 6 | 6 | 5 | 15 | 6 | 14 | 4 | 6 | 4 | 3 | 9 | 5 | 5 | 3 | 5 | 7 | 8 | 6 | 4 |
| OTT | 13 | 4 | 3 | 4 | 38 | 12 | 26 | 20 | 26 | 23 | 6 | 7 | 5 | 7 | 6 | 5 | 5 | 5 | 7 | 13 | 12 | 12 | 6 | 3 |
| PAF | 3 | 8 | 4 | 3 | 7 | 4 | 4 | 4 | 7 | 5 | 5 | 4 | 5 | 5 | 7 | 8 | 5 | 5 | 8 | 13 | 35 | 15 | 10 | 11 |
| PAG | ||||||||||||||||||||||||
| PEG | ||||||||||||||||||||||||
| PHU | 5 | 3 | 13 | 20 | 11 | 8 | 11 | 12 | 8 | 6 | 6 | 4 | 5 | 4 | 2 | 6 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | 2 |
| PPT | 3 | 2 | 1 | 1 | 3 | 4 | 2 | 7 | 3 | 5 | 2 | 2 | 2 | 2 | 2 | 4 | 6 | 2 | 3 | 8 | 12 | 6 | 3 | 3 |
| PST | ||||||||||||||||||||||||
| QSB | 2 | 1 | 1 | 1 | 2 | 6 | 6 | 8 | 2 | 4 | 6 | 3 | 3 | 2 | 4 | 4 | 2 | 1 | 2 | 2 | 8 | 5 | 3 | 4 |
| RES | 19 | 26 | 19 | 25 | 41 | 22 | 19 | 14 | 15 | 12 | 9 | 16 | 16 | 41 | 73 | 21 | 116 | 173 | 114 | 116 | 49 | 63 | 52 | 46 |
| SBA | 49 | 12 | 21 | 18 | 27 | 50 | 42 | 16 | 33 | 24 | 20 | 18 | 18 | 34 | 31 | 18 | 30 | 30 | 24 | 22 | 29 | 55 | 42 | 28 |
| SFS | ||||||||||||||||||||||||
| SHU | ||||||||||||||||||||||||
| SIT | 8 | 7 | 4 | 13 | 27 | 42 | 36 | 218 | 178 | 61 | 57 | 36 | 40 | 11 | 7 | 19 | 16 | 7 | 8 | 5 | 12 | 4 | 7 | 6 |
| SJG | 2 | 1 | 1 | 2 | 4 | 4 | 1 | 2 | 3 | 3 | 4 | 7 | 2 | 3 | 4 | 2 | 4 | 6 | 9 | 4 | 3 | 2 | 1 | 2 |
| SOD | 47 | 18 | 5 | 16 | 9 | 15 | 21 | 9 | 30 | 41 | 20 | 18 | 19 | 10 | 27 | 50 | 10 | 9 | 22 | 46 | 328 | 68 | 40 | 48 |
| SPT | 2 | 1 | 0 | 1 | 1 | 1 | 2 | 3 | 3 | 4 | 10 | 3 | 5 | 2 | 3 | 6 | 3 | 3 | 4 | 1 | 3 | 6 | 1 | 1 |
| STJ | 8 | 9 | 5 | 13 | 32 | 27 | 20 | 21 | 33 | 18 | 15 | 19 | 10 | 9 | 14 | 13 | 10 | 8 | 18 | 21 | 21 | 11 | 10 | 23 |
| SUA | ||||||||||||||||||||||||
| TAM | 1 | 1 | 0 | 1 | 1 | 2 | 2 | 4 | 2 | 2 | 2 | 1 | 3 | 6 | 4 | 2 | 3 | 5 | 1 | 1 | 2 | 1 | 1 | 2 |
| TAN | ||||||||||||||||||||||||
| TDC | ||||||||||||||||||||||||
| THL | 13 | 12 | 12 | 44 | 49 | 16 | 20 | 19 | 16 | 15 | 21 | 17 | 31 | 77 | 82 | 33 | 69 | 75 | 44 | 31 | 50 | 22 | 30 | 25 |
| THY | 1 | 1 | 0 | 0 | 2 | 2 | 1 | 7 | 6 | 2 | 4 | 4 | 3 | 5 | 6 | 6 | 3 | 2 | 2 | 3 | 7 | 2 | 1 | 3 |
| TRW | 5 | 1 | 1 | 2 | 3 | 3 | 2 | 2 | 1 | 2 | 3 | 3 | 1 | 5 | 7 | 8 | 2 | 4 | 6 | 7 | 5 | 1 | 3 | 2 |
| TSU | 1 | 1 | 1 | 1 | 1 | 3 | 6 | 3 | 6 | 5 | 4 | 3 | 1 | 2 | 7 | 5 | 1 | 1 | 3 | 2 | 6 | 2 | 3 | 5 |
| TUC | 4 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 2 | 2 | 5 | 5 | 3 | 2 | 2 | 3 | 2 | 1 | 4 | 3 |
| UPS | 19 | 7 | 2 | 4 | 5 | 10 | 3 | 3 | 5 | 7 | 9 | 6 | 2 | 11 | 11 | 21 | 13 | 5 | 3 | 20 | 40 | 29 | 9 | 23 |
| VAL | 12 | 6 | 2 | 4 | 12 | 10 | 8 | 6 | 8 | 3 | 12 | 7 | 6 | 3 | 12 | 21 | 5 | 5 | 4 | 7 | 27 | 12 | 3 | 14 |
| VIC | 8 | 2 | 2 | 4 | 7 | 9 | 11 | 24 | 31 | 9 | 8 | 6 | 9 | 3 | 2 | 4 | 4 | 6 | 6 | 3 | 6 | 5 | 6 | 7 |
| VSS | 4 | 2 | 1 | 3 | 5 | 1 | 5 | 4 | 3 | 6 | 6 | 6 | 11 | 8 | 4 | 8 | 2 | 3 | 7 | 2 | 4 | 4 | 3 | 7 |
| WNG | 9 | 5 | 2 | 1 | 4 | 5 | 4 | 6 | 3 | 3 | 5 | 3 | 5 | 10 | 8 | 19 | 10 | 3 | 3 | 3 | 22 | 8 | 7 | 10 |
| YKC | 33 | 9 | 10 | 41 | 379 | 274 | 454 | 123 | 177 | 174 | 67 | 70 | 112 | 53 | 65 | 72 | 31 | 19 | 24 | 32 | 39 | 41 | 27 | 31 |
- Date modified: