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Alibag

IAGA CODE: 
ABG
Geographic Location: 
Lat(°N): 
18.64
Long(°E): 
72.87
Geomagnetic Location: 
Lat(°N): 
10.55
Long(°E): 
147.09
Magnetometers: 
Variation Recordings: 
Suspended Tri-axial Fluxgate Magnetometer. Type - FGE
Absolute Measurements: 
DI-Flux Magnetometer, Overhauser Effect Proton Scalar Magnetometer, GEM System, Type - GSM-90, Proton Precession Magnetometer - IIG make.
Staff at Observatory: 
Mr. S Patro, Mr. A. Bhingare, Mr. Anoop K.S.
Address: 
Magnetic Observatory Alibag, Dist. Raigad, Maharashtra - 402201, India

This is the Prime Magnetic Observatory. It was established in April 1904 as a successor to Colaba Magnetic Observatory, Bombay. It is located on the West Coast of India away from the influence of the equatorial electrojet. The two historic non-magnetic buildings, one for housing the magnetometers, measuring the continuous daily variation recordings and the other for absolute measurements, built completely with non-magnetic Porbunder sandstones, brass or copper fittings.

Alibag acquired the status of an INTERMAGNET observatory since 1997. Alibag being a coastal station, magnetic recordings are influenced by the induced oceanic currents from the Arabian Sea. ABG is a calibration centre for magnetic compasses of Indian Navy, Airforce and serves as a base station for a marine magnetic survey carried out off Arabian Sea coast.