Wake County Hazard Mitigation Plan - January 2020


based upon historical earthquake locations and geological information on the recurrence rate of fault ruptures. When all the possible earthquakes and magnitudes have been considered, a ground motion value is determined such that the annual rate of its being exceeded has a certain value. Therefore, for the given probability of exceedance, two percent, the locations shaken more frequently will have larger ground motions. Wake County is located within the light blue and dark gray zones representing a low peak acceleration of 0.04 to 0.1% g. Figure 4.8 – Seismic Hazard Information for North Carolina

Source: USGS Earthquake Hazards Program

Based on this data, it can be reasonably assumed that an earthquake event affecting Wake County is unlikely. Probability: 1 – Unlikely Climate Change Scientists are beginning to believe there may be a connection between climate change and earthquakes. Changing ice caps and sea-level redistribute weight over fault lines, which could potentially have an influence on earthquake occurrences. However, currently no studies quantify the relationship to a high level of detail, so recent earthquakes should not be linked with climate change. While not conclusive, early research suggest that more intense earthquakes and tsunamis may eventually be added to the adverse consequences that are caused by climate change.

Wake County Multi-Jurisdictional Hazard Mitigation Plan 2019


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