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NEWS Alaska Science Forum Red and blue waves triggered by a magnitude 4.6 earthquake rippled outward from the Anchorage area and fizzled out after 45 seconds. Except in Cook Inlet basin, where the waves were trapped for another half-minute, bouncing back and forth, up and down, within the 7.5-kilometer-thick sedimentary basin.

New wave of seismic modeling

Geologists examine large cracks in the ground formed by the 2002 magnitude 7.9 Denali fault earthquake, which was strongly felt in Fairbanks and Anchorage.
Photo Courtesy Peter Haeussler, Usgs.
Geologists examine large cracks in the ground formed by the 2002 magnitude 7.9 Denali fault earthquake, which was strongly felt in Fairbanks and Anchorage.
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