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Seismic hazard is the probability that a certain ground acceleration will be reached or exceeded at a specific location within a specified period of time. The earthquake hazard map shows the maximum horizontal ground acceleration (Peak Ground Acceleration - PGA), which will be exceeded with a probability of 10% in 50 years. This means that a building constructed in an earthquake-proof manner is designed for a shock that can be expected on average once every 475 years. The design value Sα corresponds to the plateau of the elastic response spectrum with 5% damping.<\/font>

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The reassessment of the earthquake hazard was carried out according to the current state of knowledge and by applying new calculation standards. The map is based primarily on the Austrian earthquake catalog, which has been continuously expanded and updated by the Seismological Service for more than a hundred years. The current results of historical earthquake research, which are mainly based on the analysis of contemporary historical sources, were also taken into account. The measurement data from the last 25 years with a highly condensed seismic measurement network also enable a more precise characterization (localization, magnitude, earthquake mechanism) of recent seismicity.
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Why does the earthquake hazard of some regions differ in the new hazard map from the currently valid map according to ÖNORM?
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