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Table 1. Geographic and geomagnetic coordinates from the 6 observatories used in this study. In the last column, the supporting organization is indicated.

From: Automatic detection of sudden commencements using neural networks

Name (IAGA code)

Geographic latitude (°)

Geographic longitude (°)

Geomagnetic latitude (°) (11th IGRF, year 2011)

Geomagnetic longitude (°) (11th IGRF, year 2011)

Supporting organization

Alibag (ABG)

18.63

72.87

10.37

146.55

Indian Institute of Geomagnetism

Ebro (EBR)

40.82

0.49

43.06

81.49

Observatori de l’Ebre

Honolulu (HON)

21.32

202.00

21.71

270.27

United States Geological Survey

Kanoya (KNY)

31.42

130.88

22.17

201.19

Japan Meteorological Agency

M’Bour (MBO)

14.38

343.03

19.90

57.83

Institut de Recherche pour le Développment

San Juan (SJG)

18.11

293.85

28.04

6.54

United States Geological Survey