Influence of the Denali Earthquake Series on ground water levels in North America
Anna Forsstrom, University of Alaska Fairbanks

On October 23, 2002 and November 3, 2002 two relatively large earthquakes occurred in the interior of Alaska. The first earthquake, the Nenana Mountain earthquake, was a magnitude 6.7 event. The following Denali Fault earthquake, magnitude 7.9, was one of the largest strike-slip earthquakes to occur in the United States. Intense ground shaking lasted over 45 seconds during the later earthquake. As with other large earthquakes, fluctuating ground water elevations were documented at considerably far distances from the location of the earthquakes - most notable of the Denali Fault earthquake. Data presented illustrate the influence the earthquakes had on ground water elevations from as far away as 6300 km.