Some new possible anticipated signals for existence of magnetic monopoles

Most of physicists believe that the existence of magnetic monopoles had been ruled out by experiments. However, experiments only indicated that the flux of magnetic monopoles on the earth is too low to be observed. We summarize some predictions from the model of supermassive object with magnetic monopoles which match up with recent astronomical observations quantitatively. They may be the signals for existence of magnetic monopoles in the supermassive objects, such as one at the Galactic Center.