Physics Journal of the Indonesian Physical Society
DETERMINATION OF EARTH'S CORE VELOCITY NEAR CORE-MANTLE BOUNDARY
T. Prastowo1 and S. Bijaksana2
1Physics Department, Universitas Negeri Surabaya, Kampus Ketintang, Surabaya 60231, Indonesia
2Physics Department, Institut Teknologi Bandung, Jl. Ganesa 10, Bandung 40132, Indonesia
A better understanding of the dynamics of Earth's fluid outer core can be simply obtained by assuming that the fluid flow is purely toroidal near the core-mantle boundary (CMB). Such flow will be investigated in detail in order to find a main feature of the flow at the core surface. Based on the frozen-flux hypothesis and the purely toroidal assumption adopted here, we develop a computational method to calculate the horizontal velocity field of the flow. Taking data from magnetic models, such as DGRF-1990, IGRF-1995, and IGRF-2000 and using the velocity inversion equation, we have computed the core velocity for a dipole field case.