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Table 1.

Location of INTERMAGNET ground stations used in this work. Geomagnetic coordinates are given by using the IGRF geomagnetic field model year 2000.

Observatory IAGA code Geodetic latitude (°) Geodetic longitude (°) Magnetic latitude (°) Magnetic longitude (°)
Narsarsuaq NAQ 61.16 314.56 69.9 38.41
Fort Churchill FCC 58.76 265.91 67.93 327.91
Abisko ABK 68.36 18.82 65.89 114.8
Tihany THY 46.9 17.54 45.87 100.06
Fresno FRN 37.09 240.28 43.42 304.93
San Pablo Toledo SPT 39.55 355.65 42.69 75.88
Surlari SUA 44.68 26.25 42.38 107.5
Irkutsk IRT 52.27 104.45 41.68 176.8
Stennis S. Center BSL 30.35 270.36 40.06 339.49
San Juan SJG 18.11 293.85 28.2 6.02
Kakioka KAK 36.23 140.18 26.99 208.5
Honolulu HON 21.32 202.0 21.5 269.48
Alibag ABG 18.62 72.87 9.91 145.96
Hermanus HER −34.43 19.23 −33.75 83.73

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