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Influence of the Denali Earthquake Series
on ground water levels in North America 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. |