About the author  ⁄ Harold O. Sprague, P.E., F. ASCE

Harold O. Sprague, P.E., F. ASCE, is a Principal Technical Consultant with Parsons. Mr. Sprague can be reached at harold.sprague@parsons.com.

Over the past few decades, significant advances have been made in the areas of earthquake engineering and seismic design. A growing database of strong motion records, refined ground motion attenuation relationships, and probabilistic seismic hazard methodologies have led to an improved design basis for seismic events.

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