This is the first time the impact of an earthquake on the frequency behavior of a building population and the impact of the establishment of a seismic code have been demonstrated.
Table S1. Data for each reinforced concrete building measured in Lima, Peru. The table includes the age of construction (before or after 1974), the floor number on which recordings were made, the fundamental longitudinal frequency (f0long), the fundamental transverse frequency (f0trans), and the length and width of the building.
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