A server for communicating information relating to a long period ground motion that is capable of performing telecommunication with respect to a mobile terminal possessed by a user through a network, characterized by comprising:
- a user-related information acquisition unit acquiring information indicating a floor on which the user stays in a building at which the user stays, with respect to the user staying at the building including a plurality of floors;
- a building-related information acquisition unit acquiring information that is relevant to a position and a structure of the building at which the user stays and is used at the time of calculating a state of shaking that occurs due to the long period ground motion on each of the floors of the building;
- an earthquake-related information acquisition unit acquiring information that is relevant to a state of an earthquake that occurs and is used at the time of calculating the state of the shaking that occurs due to the long period ground motion on each of the floors of the building at which the user stays;
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- an information communication unit calculating the state of the shaking that occurs on the floor of the building at which the user stays due to the long period ground motion associated with the earthquake that occurs by reflecting the floor on which the user stays in the building, the position and the structure of the building, and the state of the earthquake that occurs, on the basis of each of the information items acquired by the user-related information acquisition unit, the building-related information acquisition unit, and the earthquake-related information acquisition unit, to transmit information according to the calculated state of the shaking to the mobile terminal possessed by the user.