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Table 1 List of geographic and geomagnetic locations of 69 geomagnetic observatories, their data availability periods, and trends in the residual Sq amplitude

From: Long-term variation in the upper atmosphere as seen in the geomagnetic solar quiet daily variation

Station name GLAT [degree] GLONG [degree] GMLAT [degree] GMLONG [degree] Data availability period after 1947 Trend [nT/year]
Addis Ababa 9.035 38.766 5.36 112.16 1958/1/1 to 2010/12/31 −0.125 ± 0.084
Alibag 18.638 72.872 10.37 146.55 1947/1/1 to 2011/12/31 −0.122 ± 0.043
Alma Ata 43.25 76.92 34.5 153.04 1963/5/1 to 2010/12/31 No trend
Apia −13.807 188.225 −15.25 263.01 1947/1/1 to 2009/12/31 No trend
Aregentine Island −65.25 295.73 −55.33 5.84 1957/3/13 to 2009/12/31 No trend
Bangui 4.333 18.566 4.13 91.53 1955/1/1 to 2007/12/31 No trend
Beijing 40 116.2 30.11 187.45 1957/1/1 to 1993/12/31 0.275 ± 0.172
Belsk 51.837 20.792 50.24 105.26 1966/1/1 to 2010/12/31 −0.074 ± 0.062
Boulder 40.13 254.76 48.24 321.28 1967/1/1 to 2010/12/31 No trend
Chambon-La-Foret 48.025 2.261 49.75 85.8 1947/1/1 to 2010/12/31 −0.216 ± 0.035
Crozet −46.431 51.86 −51.31 114.05 1974/1/1 to 2009/12/31 No trend
Dourbes 50.1 4.6 51.34 88.99 1957/7/1 to 2010/12/31 −0.110 ± 0.107
Eskdalemuir 55.317 356.8 57.69 83.76 1947/1/1 to 2010/12/31 −0.216 ± 0.067
Eyrewell −43.41 172.35 −46.96 254 1978/8/1 to 2010/12/31 −0.118 ± 0.155
Fredericksburg 38.2 282.63 48.14 353.93 1956/1/1 to 2010/12/31 No trend
Furstenfeldbruck 48.165 11.277 48.32 94.73 1947/1/1 to 2010/12/31 −0.099 ± 0.034
Gnangara −31.78 115.947 −41.65 189.3 1957/7/1 to 2010/12/31 −0.027 ± 0.033
Guam 13.59 144.87 5.56 216.08 1957/7/6 to 2010/12/31 No trend
Guangzhou 23.093 113.343 13.15 185.25 1960/1/1 to 2009/12/31 No trend
Hartebeesthoek −25.883 27.707 −27.18 94.97 1972/1/1 to 2009/12/31 No trend
Hartland 51 355.517 53.78 80.25 1957/1/1 to 2010/12/31 −0.135 ± 0.050
Hel 54.608 18.817 53.23 104.68 1966/1/1 to 2009/12/31 No trend
Hermanus −34.425 19.225 −34.08 84.63 1947/1/1 to 2012/12/31 0.029 ± 0.024
Honolulu 21.32 202 21.71 270.27 1947/1/1 to 2012/12/31 −0.052 ± 0.030
Huancayo −12.038 284.682 −2.07 356.97 1947/1/1 to 2009/12/31 No trend
Hurbanovo 47.873 18.19 46.85 101.24 1957/1/1 to 2011/12/31 −0.063 ± 0.032
Irkutsk 52.167 104.45 42.2 177.24 1957/7/1 to 2010/12/31 No trend
Istanbul-Kandilli 41.063 29.062 38.42 109.32 1950/1/1 to 1997/12/31 −0.106 ± 0.078
Kakioka 36.232 140.186 27.65 209.21 1947/1/1 to 2013/12/31 −0.061 ± 0.025
Kanoya 31.424 130.88 22.17 201.19 1958/1/1 to 2013/12/31 −0.043 ± 0.033
Kanozan 35.256 139.956 26.66 209.11 1962/4/1 to 2013/12/31 No trend
Kiev 50.72 30.3 47.61 113.55 1958/7/1 to 2009/12/31 0.093 ± 0.095
L’Aquila 42.383 13.317 42.36 94.68 1960/1/1 to 2009/12/31 No trend
Leningrad 59.95 30.7 56.41 118.08 1948/1/1 to 1988/12/31 No trend
Lovo 59.344 17.824 57.9 106.35 1947/1/1 to 2004/12/31 −0.126 ± 0.110
Lvov 49.9 23.75 47.88 107.22 1957/7/1 to 2009/12/31 No trend
M’Bour 14.384 343.033 19.9 57.83 1952/3/1 to 2010/12/31 0.133 ± 0.048
Memambetsu 43.91 144.189 35.63 211.74 1957/7/1 to 2013/8/31 No trend
Minsk 54.1 26.52 51.47 111.49 1961/1/1 to 1994/12/31 0.152 ± 0.103
Moscow 55.467 37.312 51.12 121.66 1957/7/1 to 2005/12/31 No trend
Newport 48.27 242.88 54.76 305.48 1966/4/1 to 2010/12/31 No trend
Niemegk 52.072 12.675 51.84 97.71 1947/1/1 to 2011/12/31 −0.120 ± 0.038
Novosibirsk 55.03 82.9 45.8 159.76 1967/1/1 to 2010/12/31 No trend
Nurmijarvi 60.508 24.655 57.89 113.15 1953/1/1 to 2009/12/31 No trend
Odessa 46.78 30.88 43.69 112.71 1957/7/1 to 1991/12/31 0.103 ± 0.086
Ottawa 45.403 284.448 55.37 355.88 1968/7/1 to 2010/12/31 −0.251 ± 0.197
Papeete −17.567 210.426 −15.13 285.49 1968/1/1 to 2009/12/31 −0.034 ± 0.089
Pilar −31.67 296.12 −21.78 7.64 1947/1/1 to 1985/12/31 0.222 ± 0.111
Port Aux Francais −49.353 70.262 −56.81 133.56 1957/1/1 to 2009/12/31 0.132 ± 0.135
Port Moresby −9.46 147.16 −17.1 220.9 1958/4/1 to 1991/12/31 No trend
Rude Skov 55.483 12.457 55.14 99.17 1947/1/1 to 1981/12/31 −0.214 ± 0.147
San Juan 18.11 293.85 28.04 6.54 1947/1/1 to 2012/12/31 No trend
She-Shan 31.097 121.187 21.36 192.31 1950/1/1 to 2006/12/31 −0.051 ± 0.043
St. Johns 47.595 307.323 56.87 24.37 1968/8/1 to 2009/12/31 −0.276 ± 0.153
Tananarive −18.917 47.552 −23.62 116.33 1957/1/1 to 2007/12/31 No trend
Tashkent 41.333 69.617 33.23 146.31 1957/7/1 to 1991/12/31 0.087 ± 0.080
Tbilisi 42.08 44.7 37 124.04 1957/1/1 to 2001/12/31 −0.267 ± 0.391
Teoloyucan 19.746 260.807 28.57 330.92 1965/1/1 to 2008/12/31 0.439 ± 0.153
Trivandrum 8.48 76.95 −0.12 149.54 1958/1/1 to 1999/12/31 −0.198 ± 0.145
Tsumeb −19.202 17.584 −18.87 86.35 1964/8/1 to 2008/12/31 No trend
Tucson 32.17 249.27 39.73 316.74 1947/1/1 to 2010/12/31 No trend
Valentia 51.93 349.75 55.65 74.7 1957/7/1 to 2010/12/31 −0.088 ± 0.076
Vassouras −22.4 316.35 −13.56 27.05 1949/1/1 to 2009/12/31 −0.315 ± 0.123
Victoria 48.52 236.58 54.08 298.38 1957/7/1 to 2010/12/31 0.035 ± 0.059
Vladivostok 43.697 132.16 34.49 201.23 1957/7/1 to 1989/12/31 0.119 ± 0.119
Wingst 53.743 9.073 54.07 95.05 1947/1/1 to 2010/12/31 −0.137 ± 0.047
Witteveen 52.813 6.668 53.59 92.26 1947/1/1 to 1984/12/31 −0.148 ± 0.105
Yakutsk 62.02 129.72 52.59 196.77 1957/7/1 to 2009/12/31 No trend
Yuzhno Sakhalinsk 46.95 142.717 38.51 209.97 1957/7/1 to 1988/12/31 No trend