Abstract

Basic methods to study the Earth's magnetic field are direct observations of the spatial distribution of  the magnetic field as well as its variations over of land, sea and in the surrounding space.

Therefore, the scientists in geomagnetic field over the world have established the equation to compute the geomagnetic field based onthe expansion of the Gauss Equation.

In this work we have used the calculating formular of IGRF11, these calculations are available for mapping the major componentss of geomagnetic field on the territory of Việt Nam, East Sea, and adjacent areas. Calculations were derived from the Website www.noaa.gov/geomag-web/#grfwmm, and calculated data were used to construct geomagnetic map for the researched area.

The obtained results are orientation data for the  maritime research as well as for computing magnetic anomalies and the cecular variation study.