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Table 1. List of stations along the Indian Sector, their Geographic and Geomagnetic coordinates, and the period of data used.

From: Secular trend of geomagnetic elements in the Indian region

Observatory Name

IAGA Code

Geographic

Geomagnetic

Period of data used

Latitude (°N)

Longitude (°E)

Latitude (°N)

Longitude (°E)

Sabhawala

SAB

30.37

77.80

20.93

151.50

1965–2009

Alibag

ABG

18.63

72.86

9.74

145.55

1921–2009

Hyderabad

HYB

17.42

78.55

7.97

150.87

1965–2009

Annamalainagar / Pondicherry

ANN/PND

11.37

79.68

1.85

151.39

1958–2009

Kodaikanal

KOD

10.23

77.46

0.92

149.11

1965–2005

Trivandrum/Tirunelveli

TRD/TIR

8.48

76.95

−0.77

148.44

1958–2009