Excitation of the Slichter mode by collision with a meteoroid or pressure variations at the surface and core boundaries

► We model the excitation of the Slichter mode using normal-mode formalism. ► We determine the complete response in the form of Green's function. ► We compute the surface excitation amplitude for pressure variations at the core boundaries and at the surface. ► We also compute the excitation amplitude induced by a meteoroid impact. ► The computations are made for a PREM Earth's model.