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 | 2 | 8 | 11 | 13 | 4 | 23 | 36 | 22 | 18 | 16 | 10 | 31 | 28 | 13 | 8 | 3 | 7 | 4 | 4 | 20 | 12 | 17 | 20 | 9 |
| ABG | 6 | 4 | 11 | 6 | 6 | 5 | 5 | 10 | 5 | 6 | 4 | 10 | 7 | 6 | 7 | 7 | 6 | 10 | 6 | 23 | 24 | 23 | 19 | 7 |
| ABK | 15 | 15 | 97 | 60 | 27 | 63 | 71 | 20 | 11 | 7 | 4 | 5 | 6 | 12 | 8 | 19 | 13 | 4 | 5 | 9 | 413 | 362 | 195 | 35 |
| AIA | 2 | 2 | 9 | 23 | 8 | 11 | 24 | 4 | 5 | 8 | 3 | 2 | 3 | 6 | 9 | 3 | 10 | 7 | 5 | 7 | 64 | 20 | 30 | 13 |
| AMS | 1 | 1 | 5 | 4 | 3 | 4 | 3 | 12 | 7 | 4 | 5 | 5 | 3 | 3 | 3 | 4 | 4 | 2 | 3 | 6 | 26 | 24 | 27 | 3 |
| API | 3 | 5 | 18 | 5 | 2 | 4 | 16 | 9 | 2 | 7 | 3 | 2 | 2 | 3 | 2 | 4 | 6 | 8 | 7 | 6 | 21 | 14 | 6 | 9 |
| AQU | 1 | 2 | 2 | 7 | 3 | 5 | 2 | 8 | 3 | 2 | 2 | 3 | 2 | 4 | 3 | 3 | 8 | 3 | 2 | 5 | 7 | 12 | 14 | 6 |
| ARS | ||||||||||||||||||||||||
| ASC | 3 | 2 | 6 | 6 | 2 | 4 | 5 | 2 | 5 | 6 | 8 | 6 | 2 | 9 | 9 | 9 | 5 | 2 | 7 | 9 | 31 | 13 | 17 | 15 |
| ASP | 2 | 8 | 17 | 4 | 4 | 4 | 10 | 7 | 4 | 4 | 1 | 1 | 1 | 2 | 3 | 3 | 3 | 3 | 2 | 6 | 11 | 13 | 9 | 5 |
| BDV | 1 | 1 | 2 | 5 | 2 | 2 | 3 | 7 | 8 | 4 | 2 | 2 | 4 | 4 | 5 | 7 | 6 | 3 | 2 | 5 | 5 | 11 | 9 | 6 |
| BEL | 3 | 2 | 9 | 13 | 4 | 5 | 4 | 13 | 6 | 7 | 2 | 6 | 9 | 7 | 9 | 16 | 8 | 5 | 3 | 6 | 19 | 17 | 13 | 10 |
| BFE | 3 | 2 | 15 | 20 | 6 | 9 | 7 | 13 | 7 | 9 | 4 | 4 | 11 | 13 | 15 | 29 | 11 | 7 | 5 | 10 | 48 | 37 | 36 | 12 |
| BFO | ||||||||||||||||||||||||
| BLC | 13 | 29 | 138 | 594 | 418 | 95 | 30 | 35 | 61 | 67 | 29 | 14 | 49 | 63 | 51 | 67 | 48 | 21 | 24 | 104 | 71 | 123 | 162 | 63 |
| BMT | 4 | 8 | 22 | 7 | 5 | 15 | 18 | 4 | 3 | 3 | 4 | 1 | 2 | 4 | 4 | 4 | 6 | 3 | 3 | 9 | 10 | 15 | 6 | 4 |
| BNG | 3 | 3 | 6 | 8 | 3 | 3 | 7 | 9 | 11 | 11 | 2 | 4 | 6 | 9 | 9 | 2 | 7 | 3 | 3 | 19 | 23 | 17 | 19 | 12 |
| BOU | 5 | 3 | 4 | 8 | 4 | 2 | 10 | 4 | 1 | 4 | 2 | 2 | 2 | 2 | 8 | 12 | 9 | 10 | 5 | 4 | 18 | 13 | 14 | 12 |
| BOX | 3 | 1 | 5 | 15 | 3 | 3 | 2 | 10 | 4 | 5 | 6 | 2 | 6 | 6 | 9 | 15 | 6 | 4 | 3 | 5 | 47 | 48 | 59 | 24 |
| BRW | 6 | 20 | 43 | 104 | 48 | 35 | 76 | 69 | 63 | 113 | 23 | 22 | 38 | 8 | 22 | 23 | 29 | 38 | 15 | 46 | 87 | 133 | 194 | 53 |
| BSL | 2 | 4 | 10 | 12 | 3 | 8 | 19 | 7 | 3 | 5 | 2 | 2 | 5 | 18 | 11 | 14 | 17 | 3 | 5 | 9 | 40 | 21 | 24 | 22 |
| CBB | 35 | 49 | 56 | 147 | 137 | 46 | 45 | 33 | 31 | 17 | 16 | 37 | 73 | 32 | 57 | 108 | 50 | 106 | 40 | 269 | 105 | 119 | 186 | 108 |
| CLF | 2 | 2 | 3 | 7 | 2 | 3 | 3 | 4 | 3 | 4 | 7 | 7 | 3 | 8 | 6 | 6 | 7 | 3 | 3 | 6 | 8 | 12 | 10 | 5 |
| CMO | 4 | 16 | 27 | 51 | 31 | 43 | 72 | 47 | 56 | 77 | 19 | 8 | 4 | 8 | 10 | 14 | 24 | 25 | 11 | 18 | 66 | 50 | 95 | 26 |
| CNB | 1 | 2 | 2 | 4 | 6 | 5 | 2 | 2 | 1 | 1 | 1 | 0 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 3 | 22 | 18 | 15 | 11 |
| CSY | ||||||||||||||||||||||||
| CTA | 6 | 8 | 13 | 8 | 4 | 5 | 11 | 8 | 5 | 6 | 1 | 1 | 2 | 3 | 4 | 4 | 5 | 4 | 2 | 9 | 12 | 12 | 16 | 3 |
| CZT | 1 | 3 | 1 | 4 | 1 | 2 | 5 | 8 | 2 | 1 | 2 | 2 | 2 | 1 | 2 | 2 | 2 | 1 | 2 | 1 | 13 | 8 | 13 | 5 |
| DLR | 3 | 2 | 6 | 11 | 6 | 4 | 19 | 7 | 4 | 6 | 2 | 3 | 3 | 7 | 13 | 6 | 10 | 4 | 4 | 16 | 42 | 17 | 31 | 21 |
| DOU | 2 | 2 | 6 | 8 | 3 | 3 | 5 | 8 | 3 | 4 | 6 | 8 | 3 | 9 | 6 | 8 | 7 | 6 | 4 | 7 | 16 | 15 | 6 | 5 |
| DRV | 69 | 109 | 58 | 37 | 27 | 50 | 28 | 28 | 15 | 19 | 12 | 13 | 8 | 21 | 27 | 19 | 21 | 66 | 18 | 55 | 151 | 109 | 91 | 15 |
| EBR | 2 | 3 | 6 | 15 | 7 | 10 | 6 | 4 | 5 | 9 | 3 | 7 | 2 | 8 | 6 | 6 | 16 | 7 | 5 | 10 | 13 | 21 | 22 | 10 |
| ESK | 1 | 1 | 4 | 11 | 7 | 2 | 9 | 3 | 3 | 5 | 6 | 6 | 4 | 11 | 7 | 13 | 6 | 5 | 6 | 13 | 11 | 23 | 11 | 7 |
| EUA | ||||||||||||||||||||||||
| EYR | 3 | 4 | 4 | 4 | 7 | 4 | 5 | 7 | 4 | 5 | 2 | 2 | 2 | 2 | 4 | 3 | 3 | 3 | 3 | 5 | 10 | 16 | 16 | 4 |
| FCC | 10 | 18 | 313 | 460 | 254 | 145 | 74 | 91 | 160 | 41 | 17 | 8 | 13 | 18 | 16 | 14 | 16 | 20 | 10 | 54 | 255 | 91 | 215 | 37 |
| FRD | 1 | 1 | 3 | 8 | 3 | 4 | 12 | 3 | 1 | 3 | 2 | 3 | 6 | 7 | 5 | 8 | 8 | 3 | 4 | 11 | 9 | 21 | 25 | 5 |
| FRN | 2 | 3 | 4 | 6 | 10 | 3 | 14 | 3 | 3 | 4 | 2 | 1 | 2 | 1 | 3 | 2 | 10 | 3 | 9 | 6 | 31 | 6 | 19 | 14 |
| FUR | 1 | 1 | 1 | 6 | 2 | 2 | 3 | 7 | 7 | 4 | 3 | 3 | 3 | 6 | 6 | 6 | 7 | 3 | 2 | 5 | 5 | 11 | 10 | 5 |
| GCK | ||||||||||||||||||||||||
| GDH | 45 | 9 | 207 | 206 | 66 | 110 | 165 | 97 | 64 | 107 | 26 | 39 | 47 | 64 | 91 | 78 | 70 | 23 | 59 | 172 | 57 | 58 | 85 | 49 |
| GNA | 4 | 10 | 15 | 13 | 3 | 6 | 7 | 13 | 10 | 7 | 1 | 1 | 1 | 1 | 2 | 4 | 3 | 2 | 5 | 8 | 40 | 22 | 25 | 9 |
| GUA | 11 | 2 | 20 | 21 | 20 | 11 | 5 | 11 | 4 | 7 | 2 | 2 | 2 | 3 | 3 | 4 | 6 | 5 | 5 | 12 | 9 | 15 | 5 | 14 |
| GUI | 2 | 2 | 10 | 9 | 4 | 5 | 5 | 4 | 4 | 5 | 6 | 3 | 2 | 5 | 4 | 3 | 6 | 3 | 3 | 13 | 28 | 11 | 16 | 9 |
| GZH | 4 | 4 | 10 | 4 | 2 | 3 | 6 | 10 | 2 | 3 | 1 | 2 | 2 | 4 | 3 | 5 | 7 | 4 | 4 | 14 | 14 | 18 | 9 | 6 |
| HAD | 1 | 2 | 3 | 11 | 5 | 3 | 6 | 5 | 4 | 6 | 11 | 8 | 5 | 9 | 8 | 10 | 8 | 5 | 6 | 12 | 10 | 19 | 13 | 6 |
| HBK | 1 | 3 | 6 | 7 | 10 | 7 | 4 | 5 | 3 | 4 | 6 | 4 | 5 | 5 | 6 | 5 | 5 | 3 | 4 | 7 | 7 | 6 | 9 | 3 |
| HER | 2 | 3 | 5 | 7 | 4 | 3 | 13 | 8 | 5 | 6 | 12 | 10 | 3 | 9 | 4 | 7 | 2 | 3 | 1 | 4 | 28 | 5 | 20 | 13 |
| HLP | 2 | 2 | 8 | 13 | 4 | 4 | 7 | 11 | 6 | 7 | 2 | 5 | 10 | 9 | 18 | 21 | 10 | 6 | 5 | 8 | 30 | 34 | 30 | 11 |
| HON | 4 | 8 | 18 | 10 | 9 | 3 | 14 | 6 | 2 | 7 | 2 | 2 | 2 | 4 | 2 | 6 | 12 | 2 | 4 | 10 | 35 | 14 | 9 | 18 |
| HRB | 1 | 1 | 3 | 6 | 3 | 4 | 3 | 7 | 6 | 8 | 1 | 2 | 5 | 6 | 4 | 6 | 6 | 3 | 2 | 6 | 7 | 11 | 11 | 6 |
| HRN | 40 | 40 | 59 | 239 | 51 | 55 | 163 | 116 | 94 | 40 | 13 | 15 | 34 | 31 | 29 | 51 | 26 | 55 | 44 | 47 | 304 | 257 | 106 | 128 |
| HUA | 1 | 7 | 11 | 13 | 7 | 9 | 17 | 4 | 2 | 6 | 7 | 10 | 26 | 34 | 45 | 35 | 21 | 39 | 21 | 33 | 96 | 36 | 34 | 20 |
| HYB | ||||||||||||||||||||||||
| IPM | ||||||||||||||||||||||||
| IQA | 19 | 37 | 177 | 274 | 108 | 152 | 146 | 71 | 60 | 106 | 40 | 14 | 42 | 47 | 46 | 60 | 42 | 41 | 32 | 206 | 119 | 50 | 59 | 75 |
| IRT | 4 | 11 | 17 | 2 | 6 | 9 | 15 | 9 | 5 | 8 | 3 | 4 | 4 | 3 | 6 | 6 | 6 | 2 | 2 | 8 | 7 | 17 | 11 | 8 |
| IZN | ||||||||||||||||||||||||
| KAK | 5 | 2 | 9 | 3 | 9 | 10 | 8 | 15 | 5 | 9 | 2 | 2 | 2 | 5 | 5 | 5 | 7 | 3 | 7 | 9 | 10 | 23 | 20 | 14 |
| KDU | 5 | 4 | 23 | 9 | 6 | 3 | 8 | 13 | 8 | 8 | 2 | 2 | 2 | 4 | 4 | 5 | 5 | 4 | 4 | 10 | 13 | 16 | 11 | 5 |
| KMH | ||||||||||||||||||||||||
| KNY | 4 | 5 | 15 | 5 | 5 | 11 | 12 | 11 | 4 | 6 | 3 | 2 | 2 | 5 | 6 | 6 | 8 | 4 | 5 | 13 | 13 | 22 | 13 | 6 |
| KOU | 2 | 4 | 7 | 8 | 3 | 8 | 6 | 3 | 2 | 5 | 8 | 15 | 16 | 6 | 5 | 4 | 4 | 7 | 10 | 18 | 48 | 19 | 19 | 16 |
| LER | 1 | 3 | 13 | 33 | 9 | 4 | 25 | 3 | 7 | 2 | 1 | 3 | 2 | 7 | 6 | 4 | 3 | 6 | 5 | 12 | 28 | 77 | 67 | 21 |
| LRM | 1 | 18 | 39 | 16 | 3 | 17 | 15 | 8 | 16 | 13 | 2 | 1 | 2 | 6 | 6 | 8 | 5 | 2 | 7 | 8 | 14 | 23 | 14 | 23 |
| LVV | 3 | 4 | 8 | 12 | 6 | 7 | 4 | 12 | 5 | 11 | 3 | 7 | 5 | 9 | 12 | 16 | 11 | 5 | 5 | 8 | 15 | 18 | 17 | 9 |
| LYC | ||||||||||||||||||||||||
| LZH | 3 | 8 | 19 | 9 | 2 | 11 | 16 | 5 | 8 | 5 | 4 | 1 | 2 | 5 | 5 | 5 | 7 | 4 | 3 | 13 | 14 | 18 | 6 | 3 |
| MAB | ||||||||||||||||||||||||
| MAW | ||||||||||||||||||||||||
| MBO | 2 | 3 | 10 | 9 | 3 | 4 | 7 | 4 | 12 | 15 | 11 | 1 | 4 | 5 | 7 | 5 | 5 | 8 | 8 | 18 | 41 | 19 | 21 | 15 |
| MCQ | 6 | 13 | 15 | 49 | 10 | 22 | 37 | 65 | 38 | 35 | 6 | 3 | 4 | 5 | 5 | 9 | 10 | 7 | 3 | 12 | 99 | 36 | 175 | 33 |
| MEA | 4 | 17 | 26 | 61 | 55 | 55 | 74 | 72 | 77 | 26 | 7 | 4 | 4 | 7 | 11 | 12 | 9 | 11 | 5 | 22 | 23 | 85 | 72 | 39 |
| MGD | ||||||||||||||||||||||||
| MID | ||||||||||||||||||||||||
| MMB | 5 | 3 | 4 | 6 | 7 | 4 | 7 | 7 | 3 | 5 | 1 | 1 | 1 | 3 | 4 | 4 | 4 | 3 | 6 | 7 | 9 | 20 | 20 | 16 |
| NAQ | 18 | 11 | 301 | 139 | 175 | 227 | 148 | 184 | 93 | 31 | 9 | 13 | 13 | 14 | 20 | 45 | 23 | 24 | 21 | 110 | 343 | 171 | 124 | 73 |
| NCK | 1 | 1 | 2 | 5 | 3 | 4 | 3 | 6 | 5 | 7 | 1 | 1 | 4 | 5 | 4 | 5 | 6 | 2 | 2 | 4 | 6 | 11 | 9 | 5 |
| NEW | 6 | 9 | 4 | 7 | 7 | 4 | 6 | 12 | 7 | 6 | 2 | 2 | 2 | 2 | 4 | 3 | 5 | 10 | 5 | 4 | 14 | 26 | 14 | 5 |
| NGK | 1 | 1 | 2 | 4 | 1 | 1 | 4 | 4 | 5 | 5 | 6 | 4 | 8 | 7 | 4 | 8 | 5 | 2 | 2 | 5 | 6 | 13 | 6 | 8 |
| NUR | 4 | 3 | 15 | 22 | 7 | 9 | 6 | 11 | 6 | 4 | 2 | 3 | 11 | 5 | 15 | 21 | 8 | 6 | 3 | 7 | 72 | 99 | 110 | 36 |
| NVS | 3 | 3 | 7 | 10 | 8 | 3 | 5 | 8 | 4 | 10 | 6 | 7 | 4 | 4 | 4 | 5 | 4 | 5 | 2 | 4 | 15 | 18 | 13 | 10 |
| OTT | 2 | 2 | 13 | 14 | 9 | 14 | 21 | 16 | 7 | 7 | 1 | 4 | 5 | 5 | 10 | 17 | 14 | 7 | 4 | 27 | 18 | 43 | 54 | 11 |
| PAF | 1 | 1 | 5 | 8 | 2 | 2 | 8 | 7 | 1 | 5 | 2 | 1 | 3 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 30 | 85 | 44 | 47 |
| PAG | ||||||||||||||||||||||||
| PEG | ||||||||||||||||||||||||
| PHU | 4 | 9 | 11 | 7 | 4 | 5 | 8 | 14 | 3 | 4 | 4 | 1 | 3 | 6 | 5 | 6 | 9 | 6 | 5 | 20 | 23 | 27 | 11 | 4 |
| PPT | 2 | 1 | 6 | 3 | 9 | 4 | 18 | 8 | 2 | 6 | 2 | 2 | 2 | 3 | 3 | 4 | 11 | 10 | 7 | 9 | 33 | 21 | 8 | 4 |
| PST | ||||||||||||||||||||||||
| QSB | 1 | 2 | 5 | 8 | 2 | 1 | 7 | 11 | 3 | 5 | 7 | 9 | 2 | 4 | 6 | 3 | 8 | 4 | 3 | 10 | 9 | 14 | 18 | 4 |
| RES | 36 | 40 | 18 | 57 | 13 | 15 | 6 | 31 | 15 | 7 | 12 | 23 | 28 | 31 | 54 | 143 | 119 | 168 | 89 | 119 | 130 | 46 | 24 | 64 |
| SBA | 23 | 30 | 25 | 50 | 18 | 21 | 16 | 14 | 11 | 17 | 31 | 8 | 12 | 17 | 18 | 40 | 23 | 23 | 17 | 29 | 41 | 31 | 64 | 28 |
| SFS | ||||||||||||||||||||||||
| SHU | ||||||||||||||||||||||||
| SIT | 3 | 13 | 7 | 21 | 11 | 12 | 29 | 14 | 8 | 11 | 2 | 2 | 2 | 3 | 3 | 7 | 7 | 9 | 5 | 13 | 12 | 33 | 22 | 22 |
| SJG | 2 | 3 | 6 | 7 | 4 | 7 | 11 | 3 | 3 | 3 | 6 | 5 | 1 | 5 | 9 | 8 | 7 | 3 | 5 | 7 | 32 | 10 | 14 | 15 |
| SOD | 10 | 13 | 53 | 94 | 24 | 40 | 37 | 14 | 6 | 6 | 4 | 2 | 4 | 7 | 9 | 11 | 10 | 3 | 4 | 14 | 261 | 497 | 169 | 38 |
| SPT | 2 | 1 | 5 | 6 | 2 | 2 | 3 | 3 | 2 | 8 | 4 | 1 | 1 | 4 | 2 | 3 | 9 | 3 | 2 | 5 | 11 | 12 | 13 | 6 |
| STJ | 2 | 2 | 18 | 25 | 13 | 12 | 41 | 22 | 8 | 5 | 6 | 5 | 5 | 10 | 10 | 28 | 25 | 12 | 6 | 37 | 27 | 39 | 58 | 8 |
| SUA | 1 | 1 | 4 | 7 | 3 | 2 | 2 | 11 | 3 | 3 | 2 | 2 | 2 | 4 | 7 | 7 | 6 | 2 | 2 | 4 | 6 | 12 | 12 | 6 |
| TAM | 2 | 2 | 6 | 8 | 3 | 3 | 7 | 3 | 12 | 13 | 3 | 3 | 4 | 8 | 3 | 3 | 5 | 3 | 4 | 14 | 22 | 16 | 16 | 11 |
| TAN | 1 | 1 | 3 | 4 | 3 | 1 | 3 | 6 | 5 | 2 | 4 | 1 | 1 | 4 | 4 | 2 | 4 | 1 | 3 | 7 | 7 | 7 | 11 | 3 |
| TDC | ||||||||||||||||||||||||
| THL | 15 | 12 | 26 | 39 | 7 | 15 | 34 | 39 | 10 | 37 | 48 | 56 | 49 | 87 | 112 | 300 | 187 | 223 | 172 | 87 | 106 | 34 | 28 | 18 |
| THY | 1 | 1 | 2 | 6 | 3 | 4 | 4 | 6 | 5 | 7 | 1 | 1 | 4 | 4 | 4 | 5 | 6 | 3 | 2 | 4 | 5 | 11 | 11 | 5 |
| TRW | ||||||||||||||||||||||||
| TSU | 1 | 1 | 2 | 3 | 2 | 2 | 3 | 3 | 3 | 9 | 3 | 4 | 2 | 3 | 3 | 9 | 3 | 1 | 2 | 6 | 8 | 4 | 7 | 4 |
| TUC | 4 | 2 | 3 | 6 | 8 | 2 | 14 | 3 | 3 | 4 | 2 | 2 | 3 | 2 | 7 | 4 | 3 | 6 | 4 | 11 | 32 | 8 | 21 | 18 |
| UPS | 2 | 2 | 13 | 20 | 5 | 7 | 10 | 7 | 3 | 3 | 2 | 2 | 8 | 8 | 11 | 16 | 6 | 4 | 3 | 7 | 56 | 77 | 93 | 25 |
| VAL | 1 | 1 | 10 | 12 | 8 | 5 | 5 | 6 | 6 | 7 | 10 | 10 | 3 | 8 | 11 | 4 | 6 | 5 | 7 | 15 | 24 | 24 | 17 | 7 |
| VIC | 7 | 8 | 10 | 11 | 10 | 6 | 10 | 13 | 5 | 6 | 2 | 2 | 3 | 2 | 6 | 3 | 6 | 10 | 13 | 7 | 18 | 24 | 27 | 8 |
| VSS | 1 | 2 | 7 | 6 | 2 | 6 | 3 | 3 | 2 | 10 | 13 | 7 | 5 | 5 | 7 | 9 | 10 | 14 | 6 | 10 | 41 | 11 | 19 | 15 |
| WNG | 2 | 1 | 11 | 18 | 4 | 6 | 7 | 10 | 4 | 9 | 5 | 3 | 9 | 12 | 10 | 21 | 9 | 4 | 4 | 8 | 31 | 31 | 22 | 11 |
| YKC | 20 | 34 | 173 | 163 | 169 | 229 | 184 | 344 | 157 | 62 | 47 | 31 | 18 | 33 | 14 | 27 | 25 | 27 | 10 | 46 | 158 | 173 | 192 | 22 |
- Date modified: