To accurately notify a person staying on each floor of a construction of information related to a long-period ground motion.SOLUTION: A long-period ground motion relevant information notification system 1 includes: the step of acquiring the information showing a user's staying floor in a construction in which the user stays, the information related to the position and structure of the construction, and the information related to the aspect of the occurring earthquake; calculating the aspect of the vibration occurring on the user's staying floor due to a long-period ground motion; and acquiring information related to the long-period ground motion via a user terminal 3 carried by the user, by notifying the user via the user terminal 3.SELECTED DRAWING: Figure 2
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