Earthquakes in the Nenana Basin strike longer and harder when they enter the region, according to researchers at the University of Alaska Fairbanks’ Geophysical Institute.
FAIRBANKS, Alaska - The tallest peak in North America has nothing on one obscure basin over 100 miles to the northeast.
“When earthquake waves enter into these areas like Nenana Basin, they get trapped and they shake longer, and the waves are larger. They kind of slow down and crash into each other,” Tape said. “And that amplifies the waves and so it’s that kind of motion that we’re most interested in.” “The scientists found that seismometers overlying the basin’s deepest areas recorded stronger low-frequency amplification and that monitors at the basin’s shallow edges recorded minimal amplification as the seismic waves ricocheted inside the basin,” the press release stated. “They also found that higher frequency amplification occurs at monitors over both deeper and shallower areas.”
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