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 | 11 | 20 | 14 | 0 | 20 | 56 | 39 | 22 | 21 | 31 | 17 | 14 | 10 | 6 | 14 | 8 | 4 | 11 | 10 | 4 | 7 | 5 | 20 |
| ABG | 9 | 11 | 15 | 14 | 9 | 6 | 10 | 9 | 13 | 9 | 16 | 6 | 10 | 5 | 8 | 12 | 9 | 5 | 14 | 12 | 6 | 7 | 7 | 4 |
| ABK | 102 | 244 | 171 | 259 | 101 | 45 | 29 | 19 | 39 | 27 | 25 | 22 | 41 | 69 | 36 | 75 | 30 | 40 | 138 | 41 | 55 | 65 | 48 | 281 |
| AIA | 7 | 9 | 10 | 12 | 11 | 8 | 20 | 19 | 22 | 7 | 6 | 7 | 7 | 13 | 11 | 7 | 4 | 7 | 5 | 6 | 3 | 4 | 4 | 25 |
| AMS | 6 | 12 | 14 | 12 | 9 | 20 | 9 | 8 | 10 | 12 | 5 | 12 | 5 | 5 | 3 | 9 | 10 | 6 | 18 | 12 | 5 | 4 | 6 | 6 |
| API | 7 | 8 | 29 | 11 | 6 | 3 | 6 | 3 | 5 | 8 | 14 | 5 | 5 | 3 | 3 | 4 | 8 | 4 | 6 | 7 | 11 | 4 | 6 | 20 |
| AQU | 6 | 10 | 22 | 8 | 2 | 3 | 7 | 8 | 5 | 7 | 6 | 8 | 11 | 6 | 6 | 7 | 6 | 7 | 8 | 8 | 3 | 8 | 3 | 22 |
| ARS | ||||||||||||||||||||||||
| ASC | 5 | 4 | 15 | 8 | 3 | 4 | 8 | 9 | 9 | 4 | 3 | 8 | 7 | 4 | 5 | 11 | 13 | 7 | 2 | 2 | 3 | 7 | 4 | 26 |
| ASP | 2 | 14 | 33 | 4 | 5 | 6 | 6 | 5 | 12 | 17 | 8 | 10 | 8 | 5 | 6 | 8 | 12 | 3 | 8 | 4 | 4 | 4 | 3 | 17 |
| BDV | 7 | 12 | 25 | 7 | 5 | 4 | 8 | 6 | 11 | 8 | 8 | 5 | 9 | 11 | 8 | 9 | 7 | 11 | 11 | 11 | 3 | 8 | 2 | 18 |
| BEL | 8 | 16 | 35 | 8 | 10 | 6 | 9 | 8 | 14 | 10 | 10 | 10 | 14 | 15 | 11 | 14 | 11 | 13 | 12 | 18 | 6 | 9 | 4 | 14 |
| BFE | 11 | 23 | 43 | 9 | 7 | 8 | 12 | 8 | 17 | 10 | 11 | 13 | 17 | 22 | 15 | 19 | 17 | 19 | 17 | 20 | 6 | 11 | 4 | 9 |
| BFO | ||||||||||||||||||||||||
| BLC | 14 | 89 | 196 | 147 | 41 | 16 | 16 | 25 | 29 | 101 | 39 | 68 | 57 | 55 | 62 | 122 | 153 | 43 | 61 | 47 | 63 | 42 | 104 | 58 |
| BMT | 5 | 19 | 22 | 12 | 20 | 18 | 16 | 8 | 20 | 6 | 9 | 10 | 13 | 6 | 9 | 11 | 11 | 10 | 10 | 7 | 4 | 5 | 9 | 18 |
| BNG | 5 | 5 | 23 | 8 | 3 | 6 | 15 | 16 | 17 | 12 | 8 | 6 | 9 | 14 | 9 | 11 | 7 | 4 | 6 | 8 | 3 | 7 | 4 | 27 |
| BOU | 4 | 16 | 31 | 13 | 13 | 8 | 16 | 8 | 12 | 14 | 7 | 6 | 2 | 11 | 13 | 16 | 11 | 14 | 14 | 7 | 6 | 10 | 4 | 13 |
| BOX | 5 | 29 | 34 | 10 | 18 | 10 | 10 | 6 | 22 | 13 | 22 | 26 | 29 | 22 | 20 | 20 | 14 | 18 | 27 | 9 | 10 | 8 | 9 | |
| BRW | 37 | 211 | 203 | 189 | 144 | 91 | 83 | 88 | 98 | 187 | 272 | 350 | 74 | 91 | 128 | 103 | 168 | 122 | 76 | 59 | 80 | 44 | 41 | 36 |
| BSL | 4 | 14 | 19 | 10 | 8 | 10 | 11 | 7 | 10 | 11 | 5 | 6 | 8 | 10 | 9 | 7 | 5 | 3 | 5 | 5 | 5 | 8 | 3 | 4 |
| CBB | 62 | 87 | 81 | 86 | 57 | 19 | 17 | 17 | 34 | 25 | 41 | 38 | 44 | 42 | 75 | 126 | 348 | 78 | 113 | 108 | 124 | 72 | 76 | 57 |
| CLF | 6 | 11 | 20 | 7 | 3 | 5 | 9 | 4 | 9 | 4 | 9 | 4 | 8 | 10 | 7 | 7 | 5 | 10 | 9 | 7 | 3 | 8 | 4 | 23 |
| CMO | 19 | 220 | 107 | 85 | 114 | 143 | 104 | 84 | 106 | 115 | 195 | 131 | 40 | 35 | 22 | 78 | 68 | 24 | 21 | 20 | 25 | 19 | 18 | 21 |
| CNB | 5 | 19 | 35 | 6 | 3 | 11 | 15 | 9 | 10 | 19 | 15 | 9 | 8 | 5 | 7 | 6 | 7 | 3 | 3 | 6 | 5 | 3 | 6 | 23 |
| CSY | ||||||||||||||||||||||||
| CTA | 1 | 20 | 40 | 8 | 3 | 4 | 8 | 7 | 8 | 16 | 11 | 8 | 8 | 5 | 6 | 8 | 10 | 3 | 7 | 5 | 7 | 3 | 3 | 17 |
| CZT | 7 | 17 | 38 | 14 | 5 | 12 | 12 | 15 | 6 | 7 | 7 | 9 | 9 | 6 | 3 | 4 | 11 | 6 | 14 | 7 | 4 | 6 | 5 | 28 |
| DLR | 6 | 13 | 23 | 8 | 8 | 9 | 13 | 6 | 10 | 12 | 7 | 6 | 3 | 6 | 5 | 5 | 6 | 4 | 4 | 4 | 4 | 8 | 2 | 5 |
| DOU | 7 | 16 | 20 | 6 | 3 | 7 | 11 | 6 | 10 | 7 | 10 | 5 | 10 | 12 | 11 | 10 | 8 | 12 | 11 | 8 | 3 | 8 | 5 | 23 |
| DRV | 16 | 146 | 114 | 56 | 22 | 36 | 19 | 26 | 25 | 18 | 33 | 19 | 20 | 19 | 17 | 9 | 12 | 9 | 12 | 29 | 21 | 32 | 20 | 52 |
| EBR | 5 | 9 | 20 | 10 | 4 | 8 | 10 | 10 | 14 | 10 | 8 | 18 | 13 | 18 | 9 | 21 | 11 | 10 | 10 | 14 | 5 | 7 | 4 | 27 |
| ESK | 12 | 21 | 22 | 12 | 5 | 8 | 15 | 8 | 13 | 12 | 13 | 7 | 11 | 21 | 16 | 20 | 16 | 22 | 16 | 14 | 5 | 10 | 8 | 19 |
| EUA | ||||||||||||||||||||||||
| EYR | 11 | 15 | 30 | 11 | 14 | 15 | 15 | 8 | 9 | 9 | 31 | 26 | 7 | 6 | 5 | 4 | 5 | 6 | 3 | 7 | 3 | 11 | 8 | 20 |
| FCC | 32 | 116 | 407 | 106 | 88 | 102 | 49 | 44 | 192 | 215 | 60 | 54 | 52 | 62 | 26 | 55 | 77 | 19 | 25 | 46 | 25 | 29 | 66 | 52 |
| FRD | 5 | 15 | 10 | 11 | 6 | 10 | 9 | 7 | 10 | 7 | 3 | 2 | 13 | 12 | 6 | 9 | 13 | 13 | 5 | 8 | 8 | 9 | 5 | 10 |
| FRN | 3 | 14 | 31 | 7 | 12 | 9 | 17 | 6 | 10 | 12 | 11 | 9 | 6 | 4 | 8 | 16 | 11 | 2 | 10 | 7 | 6 | 7 | 3 | 12 |
| FUR | 6 | 12 | 23 | 7 | 4 | 4 | 8 | 7 | 11 | 8 | 8 | 4 | 9 | 11 | 7 | 8 | 7 | 11 | 10 | 10 | 3 | 8 | 3 | 21 |
| GCK | ||||||||||||||||||||||||
| GDH | 24 | 19 | 208 | 172 | 63 | 43 | 36 | 18 | 124 | 85 | 61 | 51 | 39 | 39 | 43 | 134 | 160 | 24 | 49 | 49 | 58 | 42 | 35 | 43 |
| GNA | 2 | 11 | 25 | 5 | 4 | 4 | 5 | 4 | 7 | 16 | 4 | 12 | 7 | 4 | 6 | 8 | 13 | 4 | 10 | 3 | 3 | 3 | 3 | 13 |
| GUA | 13 | 18 | 20 | 8 | 8 | 12 | 6 | 8 | 7 | 9 | 7 | 7 | 7 | 4 | 4 | 6 | 8 | 4 | 7 | 3 | 8 | 10 | 18 | 5 |
| GUI | 5 | 8 | 13 | 8 | 4 | 7 | 10 | 5 | 6 | 3 | 4 | 17 | 15 | 6 | 3 | 9 | 8 | 5 | 7 | 3 | 2 | 7 | 5 | 29 |
| GZH | 7 | 12 | 14 | 8 | 4 | 3 | 7 | 4 | 13 | 5 | 5 | 8 | 9 | 4 | 5 | 8 | 10 | 6 | 11 | 5 | 3 | 5 | 3 | 4 |
| HAD | 7 | 12 | 19 | 7 | 3 | 7 | 10 | 4 | 9 | 7 | 11 | 5 | 8 | 13 | 14 | 12 | 7 | 15 | 9 | 8 | 4 | 9 | 6 | 23 |
| HBK | 5 | 7 | 26 | 10 | 4 | 3 | 5 | 8 | 10 | 6 | 9 | 5 | 6 | 5 | 4 | 8 | 7 | 3 | 6 | 6 | 3 | 4 | 3 | 31 |
| HER | 5 | 7 | 24 | 8 | 3 | 5 | 5 | 7 | 11 | 3 | 5 | 7 | 5 | 8 | 6 | 5 | 7 | 3 | 4 | 3 | 2 | 4 | 2 | 33 |
| HLP | 10 | 25 | 31 | 7 | 10 | 8 | 12 | 8 | 19 | 13 | 12 | 11 | 17 | 20 | 15 | 15 | 15 | 17 | 18 | 17 | 5 | 10 | 4 | 16 |
| HON | 1 | 16 | 28 | 5 | 3 | 4 | 10 | 5 | 5 | 7 | 12 | 6 | 5 | 3 | 4 | 5 | 4 | 7 | 2 | 3 | 6 | 4 | 8 | 7 |
| HRB | 6 | 13 | 26 | 8 | 6 | 4 | 8 | 7 | 11 | 9 | 8 | 5 | 13 | 10 | 6 | 10 | 7 | 11 | 11 | 13 | 3 | 8 | 2 | 19 |
| HRN | 25 | 97 | 77 | 313 | 175 | 125 | 117 | 103 | 90 | 65 | 66 | 70 | 99 | 131 | 82 | 70 | 124 | 36 | 214 | 176 | 40 | 75 | 32 | 32 |
| HUA | 5 | 18 | 13 | 5 | 4 | 10 | 8 | 10 | 6 | 9 | 9 | 20 | 39 | 35 | 29 | 53 | 51 | 32 | 42 | 20 | 6 | 7 | 11 | 11 |
| HYB | ||||||||||||||||||||||||
| IPM | ||||||||||||||||||||||||
| IQA | 34 | 38 | 479 | 225 | 113 | 34 | 43 | 55 | 165 | 168 | 74 | 74 | 87 | 83 | 52 | 75 | 103 | 88 | 78 | 67 | 49 | 44 | 81 | 399 |
| IRT | ||||||||||||||||||||||||
| IZN | ||||||||||||||||||||||||
| KAK | 3 | 10 | 22 | 5 | 13 | 11 | 9 | 5 | 11 | 5 | 6 | 7 | 8 | 3 | 5 | 6 | 6 | 6 | 6 | 2 | 4 | 7 | 9 | 12 |
| KDU | 7 | 7 | 31 | 6 | 3 | 3 | 7 | 8 | 7 | 16 | 7 | 8 | 7 | 4 | 5 | 8 | 10 | 3 | 9 | 3 | 4 | 3 | 2 | 9 |
| KMH | ||||||||||||||||||||||||
| KNY | 2 | 9 | 22 | 4 | 8 | 10 | 10 | 4 | 14 | 5 | 7 | 7 | 9 | 4 | 6 | 8 | 8 | 6 | 8 | 3 | 3 | 7 | 9 | 17 |
| KOU | 4 | 10 | 8 | 4 | 3 | 4 | 6 | 7 | 3 | 7 | 6 | 12 | 20 | 6 | 7 | 9 | 9 | 9 | 9 | 8 | 4 | 7 | 6 | 17 |
| LER | 10 | 27 | 27 | 31 | 6 | 5 | 12 | 7 | 9 | 9 | 16 | 9 | 14 | 24 | 14 | 29 | 20 | 23 | 16 | 17 | 7 | 12 | 6 | 25 |
| LRM | 3 | 10 | 28 | 6 | 4 | 7 | 7 | 7 | 8 | 21 | 6 | 12 | 9 | 5 | 7 | 10 | 11 | 3 | 11 | 3 | 3 | 3 | 3 | 11 |
| LVV | 6 | 15 | 26 | 10 | 11 | 5 | 8 | 8 | 13 | 11 | 9 | 10 | 12 | 12 | 8 | 13 | 11 | 14 | 13 | 15 | 5 | 8 | 5 | 17 |
| LYC | ||||||||||||||||||||||||
| LZH | 9 | 6 | 10 | 9 | 11 | 5 | 7 | 11 | 12 | 8 | 12 | 8 | 4 | 5 | 6 | 13 | ||||||||
| MAB | ||||||||||||||||||||||||
| MAW | ||||||||||||||||||||||||
| MBO | 5 | 10 | 15 | 7 | 3 | 6 | 5 | 8 | 11 | 18 | 15 | 14 | 7 | 13 | 14 | 10 | 6 | 6 | 4 | 4 | 3 | 8 | 5 | 28 |
| MCQ | 17 | 55 | 27 | 45 | 19 | 22 | 34 | 66 | 172 | 110 | 163 | 110 | 27 | 21 | 13 | 18 | 22 | 24 | 13 | 16 | 17 | 12 | 12 | 18 |
| MEA | 11 | 86 | 55 | 63 | 46 | 41 | 42 | 44 | 45 | 80 | 30 | 29 | 14 | 16 | 13 | 32 | 27 | 8 | 14 | 19 | 22 | 18 | 17 | 17 |
| MGD | ||||||||||||||||||||||||
| MID | ||||||||||||||||||||||||
| MMB | 11 | 9 | 20 | 15 | 19 | 7 | 14 | 8 | 12 | 7 | 7 | 10 | 10 | 4 | 7 | 9 | 6 | 8 | 6 | 3 | 5 | 9 | 9 | 15 |
| NAQ | 64 | 33 | 214 | 193 | 81 | 136 | 67 | 48 | 80 | 82 | 32 | 27 | 43 | 39 | 21 | 57 | 52 | 38 | 73 | 37 | 23 | 38 | 29 | 486 |
| NCK | 6 | 13 | 22 | 7 | 4 | 4 | 8 | 6 | 9 | 9 | 8 | 6 | 12 | 9 | 7 | 9 | 6 | 10 | 10 | 10 | 3 | 8 | 3 | 19 |
| NEW | 5 | 38 | 55 | 16 | 18 | 15 | 22 | 9 | 16 | 14 | 9 | 10 | 4 | 7 | 12 | 22 | 16 | 6 | 14 | 19 | 12 | 11 | 9 | 21 |
| NGK | 9 | 17 | 33 | 7 | 6 | 6 | 11 | 7 | 15 | 9 | 10 | 7 | 12 | 16 | 12 | 12 | 10 | 15 | 14 | 15 | 4 | 9 | 3 | 17 |
| NUR | 7 | 35 | 35 | 12 | 9 | 9 | 9 | 5 | 17 | 16 | 11 | 21 | 24 | 32 | 21 | 26 | 24 | 16 | 21 | 23 | 9 | 12 | 8 | 12 |
| NVS | 5 | 16 | 15 | 7 | 7 | 9 | 16 | 9 | 21 | 20 | 13 | 14 | 14 | 11 | 9 | 11 | 11 | 9 | 19 | 10 | 6 | 6 | 6 | 8 |
| OTT | 6 | 19 | 24 | 12 | 9 | 11 | 9 | 9 | 10 | 6 | 6 | 4 | 20 | 16 | 11 | 12 | 27 | 20 | 6 | 16 | 7 | 15 | 6 | 13 |
| PAF | 6 | 15 | 31 | 10 | 12 | 13 | 12 | 9 | 13 | 13 | 9 | 13 | 6 | 9 | 5 | 8 | 16 | 8 | 20 | 26 | 8 | 6 | 11 | 10 |
| PAG | ||||||||||||||||||||||||
| PEG | ||||||||||||||||||||||||
| PHU | 7 | 15 | 12 | 7 | 4 | 5 | 8 | 8 | 14 | 6 | 6 | 10 | 10 | 5 | 6 | 10 | 12 | 6 | 13 | 6 | 4 | 5 | 3 | 3 |
| PPT | 1 | 16 | 21 | 5 | 2 | 7 | 8 | 4 | 6 | 7 | 12 | 5 | 4 | 3 | 4 | 7 | 7 | 7 | 8 | 7 | 6 | 13 | 14 | 20 |
| PST | ||||||||||||||||||||||||
| QSB | 6 | 12 | 28 | 12 | 4 | 3 | 8 | 8 | 9 | 10 | 9 | 9 | 12 | 8 | 9 | 12 | 7 | 6 | 13 | 16 | 5 | 8 | 5 | 23 |
| RES | 28 | 79 | 49 | 75 | 40 | 19 | 22 | 19 | 39 | 37 | 28 | 35 | 109 | 113 | 73 | 121 | 196 | 86 | 92 | 79 | 37 | 67 | 47 | 50 |
| SBA | 21 | 91 | 108 | 86 | 38 | 40 | 32 | 26 | 54 | 59 | 35 | 44 | 47 | 54 | 26 | 65 | 70 | 13 | 15 | 26 | 24 | 19 | 24 | 45 |
| SFS | ||||||||||||||||||||||||
| SHU | ||||||||||||||||||||||||
| SIT | 11 | 67 | 47 | 13 | 22 | 25 | 15 | 9 | 25 | 10 | 14 | 17 | 5 | 8 | 10 | 22 | 15 | 9 | 12 | 17 | 12 | 9 | 11 | 15 |
| SJG | 4 | 6 | 7 | 4 | 3 | 4 | 6 | 5 | 3 | 5 | 2 | 6 | 8 | 5 | 5 | 8 | 4 | 3 | 4 | 4 | 5 | 7 | 3 | 10 |
| SOD | 135 | 158 | 147 | 137 | 40 | 23 | 20 | 17 | 30 | 28 | 24 | 23 | 39 | 59 | 33 | 59 | 17 | 27 | 94 | 30 | 24 | 47 | 44 | 219 |
| SPT | 5 | 10 | 19 | 10 | 3 | 4 | 9 | 5 | 6 | 5 | 6 | 8 | 14 | 7 | 5 | 8 | 6 | 3 | 5 | 5 | 2 | 7 | 4 | 29 |
| STJ | 6 | 11 | 45 | 30 | 6 | 10 | 12 | 7 | 7 | 8 | 12 | 10 | 20 | 12 | 4 | 6 | 20 | 24 | 8 | 14 | 4 | 11 | 5 | 31 |
| SUA | 8 | 11 | 24 | 10 | 3 | 5 | 7 | 6 | 14 | 12 | 9 | 9 | 12 | 13 | 7 | 10 | 6 | 10 | 10 | 14 | 4 | 6 | 4 | 21 |
| TAM | 4 | 11 | 22 | 9 | 3 | 5 | 6 | 8 | 11 | 12 | 5 | 10 | 7 | 6 | 9 | 11 | 7 | 4 | 5 | 6 | 3 | 8 | 4 | 29 |
| TAN | 4 | 8 | 21 | 6 | 4 | 3 | 4 | 7 | 11 | 6 | 8 | 5 | 5 | 5 | 4 | 8 | 7 | 3 | 10 | 7 | 3 | 3 | 3 | 18 |
| TDC | ||||||||||||||||||||||||
| THL | 11 | 68 | 83 | 27 | 14 | 22 | 9 | 16 | 30 | 57 | 37 | 68 | 65 | 142 | 79 | 53 | 58 | 67 | 18 | 31 | 36 | 27 | 35 | 78 |
| THY | 6 | 15 | 25 | 9 | 4 | 4 | 8 | 7 | 10 | 11 | 8 | 6 | 14 | 10 | 7 | 10 | 6 | 11 | 11 | 12 | 4 | 8 | 3 | 21 |
| TRW | ||||||||||||||||||||||||
| TSU | 5 | 6 | 25 | 10 | 3 | 4 | 8 | 5 | 9 | 6 | 12 | 4 | 6 | 5 | 9 | 8 | 6 | 3 | 7 | 7 | 3 | 6 | 3 | 33 |
| TUC | 4 | 13 | 26 | 7 | 9 | 7 | 16 | 6 | 11 | 13 | 9 | 6 | 6 | 4 | 9 | 8 | 6 | 3 | 7 | 4 | 5 | 9 | 3 | 9 |
| UPS | 8 | 31 | 35 | 13 | 4 | 8 | 10 | 5 | 12 | 9 | 9 | 16 | 19 | 27 | 15 | 23 | 20 | 18 | 19 | 20 | 5 | 12 | 5 | 10 |
| VAL | 6 | 9 | 13 | 7 | 2 | 8 | 9 | 5 | 8 | 11 | 12 | 6 | 5 | 12 | 15 | 13 | 7 | 16 | 7 | 7 | 4 | 7 | 6 | 23 |
| VIC | 4 | 33 | 53 | 10 | 16 | 15 | 18 | 8 | 16 | 14 | 13 | 15 | 4 | 6 | 8 | 18 | 13 | 5 | 12 | 17 | 11 | 9 | 7 | 17 |
| VSS | 6 | 12 | 12 | 7 | 4 | 4 | 7 | 11 | 5 | 13 | 8 | 12 | 18 | 8 | 10 | 15 | 24 | 16 | 9 | 3 | 3 | 7 | 6 | 24 |
| WNG | 12 | 21 | 40 | 6 | 6 | 7 | 13 | 8 | 18 | 10 | 11 | 10 | 14 | 19 | 15 | 16 | 14 | 18 | 17 | 18 | 5 | 10 | 4 | 13 |
| YKC | 25 | 207 | 253 | 123 | 87 | 119 | 41 | 22 | 159 | 183 | 54 | 75 | 37 | 47 | 31 | 82 | 106 | 18 | 26 | 33 | 32 | 27 | 39 | 87 |
- Date modified: