The 1700 AD tsunami generated by a large earthquake on the Cascadia subduction zone in the Pacific Northwest was dated most precisely using
A)Native American histories
B)Pacific Northwest sediments
C)Japanese tsunami records
D)early seismograms in China

Question

Quizplus · Accepted Answer

Japanese tsunami records, known as "orphan tsunamis," provided precise dating for the 1700 Cascadia event because they documented an unexpected tsunami without a corresponding earthquake in Japan, allowing scientists to link it to the Cascadia earthquake.

The 1700 AD Tsunami Generated by a Large Earthquake on the Cascadia