The Green-HUGS research project is a joint initiative between three Spanish research entities: The University of A Coruña (UDC), The Polytechnic University of Madrid (UPM) and the Spanish National Research Council (CSIC). The project is devoted to analyze the viability of using geological formations to efficiently store Green Hydrogen mainly by means of numerical simulation but also by laboratory chemical experiments. This seminar is oriented to present the main characteristics and specific objectives of the project and the research lines that are being developed on it in order to discuss about them.