A seismo-tectonic study of Flagstaff, Arizona was conducted to determine the range of possible expected ground motion parameters which could originate from local and regional earthquake activity. This study is based on correlation of regional geology and historical earthquake data, obtained from multiple sources. The study concludes that the Flagstaff area could be affected by future major earthquake activity, consisting of a local event originating on the Oak Creek Canyon fault system. Distant events, originating in other seismically active areas of northwest Arizona and extreme southwest Arizona are not likely to produce significant ground motion at Flagstaff.

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