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Table 7.

The activity level at the selected observatories and variometers in 2011 and 2012. Max/Avg H dev is the maximum and average deviation in the horizontal magnetic field and Max/Avg D dev is the maximum and average deviation in the declination.

Location Region #substorms Max H var (nT) Avg H var (nT) Max ± D var (°) Avg D var (°)
2011
Bjørnøya Barents Sea 242 −1197 −290 −2.23 4.79 0.19
Tromsø 197 −1188 −328 −1.51 2.72 0.29
Amderma* Siberia 60 −1569 −354 −0.75 2.20 0.71
Dikson 153 −880 −333 −0.56 1.09 0.38
Pevek 131 −1217 −336 −2.17 1.19 −0.37
Tixie 173 −1088 −298 −2.36 1.23 −0.59
Barrow Alaska 268 −1263 −327 −3.69 3.69 0.20
College 155 −2546 −392 −1.23 3.33 0.00
Deadhorse 257 −1418 −328 −3.24 1.33 −0.22
Fort Churchill Canada/Greenland 210 −858 −266 −3.14 1.27 −0.21
Iqaluit
Nuuk 213 −872 −252 −1.93 2.00 −0.23
Ittoqqortoormiit 231 −919 −274 −2.35 1.67 −0.11
2012
Bjørnøya Barents Sea 257 −885 −286 −1.59 2.70 0.07
Tromsø 226 −899 −323 −1.83 2.55 0.24
Amderma Siberia 190 −1086 −369 −3.34 5.00 0.83
Dikson* 22 −882 −211 −2.66 1.12 −0.86
Pevek 175 −1303 −336 −1.88 1.47 −0.27
Tixie 212 −1071 −302 −2.87 1.84 −0.48
Tixie 1991** 278 −1465 −392 −4.02 0.95 −0.56
Barrow Alaska 288 −2329 −354 −2.59 4.00 0.22
College 197 −2379 −412 −1.20 2.34 0.00
Deadhorse 284 −1896 −345 −3.15 3.13 −0.29
Fort Churchill Canada/Greenland 224 −1341 −295 −2.67 3.77 −0.24
Iqaluit 235 −797 −249 −4.27 0.71 −0.52
Nuuk 224 −981 −250 −1.66 1.09 −0.25
Ittoqqortoormiit 252 −739 −254 −1.85 1.72 −0.07
*

Poor dataset.

**

Dataset is for 1991.

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