The aim is demonstrating Earth's outer core liquid metal flow can create geomagnetism itself without having to resort to Geodynamo effect. Geomagnetism Generation, is currently a mystery and leading existing theory “Earth's core and Geodynamo” hasn’t yet been able to explain Earth’s magnetism formation clearly. Explore another way Earth's magnetism is formed, by electric current movement through the outer core’s liquid metal flow considered as a whole and not divided into separate convection currents. This leads us to a more straightforward geomagnetism theory without adding a sum of convection currents to create a global magnet that covers the Earth. The result is a reasonable theory of geomagnetism that would also explain Magnetic Declination and Geomagnetic Reversal, while opening a new way on Sun’s magnetism and planets magnetism research.