HR: 0800h
AN: GP21A-02    [Abstracts]
TI: The Dipole and Cuadrupole Aproximation of the Earth Magnetic Field for Monitoring the Temporal Evolution
AU: * Gianibelli, J C
EM: geophgianibelli@yahoo.com
AB: In the present work are compiled the coefficients of spherical harmonics analysis representing the dipole and cuadrupole aproximation of the Earth Magnetic Field, from 1550 to 2005 years. The temporal variation of each coefficient are approximately by a non linear function in the interval of study and then forecasting the values up to year 2100. The position of the excentric dipole aproximation and also the energy for the dipolar and cuadrupolar components and their relationship are evaluated. A conclusion is that the changes for the year 2100 will be a very important transition to a multipolar expression of the Earth Magnetic Field after year 2100. Will be possible that the South Atlantic Anomaly shows very low values for total magnetic intensity, and the energy of cuadrupole will be 14% of the dipole energy comparatively to the 5% in the year 2005.
DE: 1513 Geomagnetic excursions
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2007 Joint Assembly