Japanese history records a mysterious tsunami in 1700 that was unaccompanied by the usual earthquake. Modern USGS research has traced the source of that tsunami to a large seismic event on the Cascadia Subduction Zone of Washington and Oregon. Watch our videotaped public lecture to find out how sleuthing into the past helps us learn about geologic hazards of the present.
Search USGS Fact Sheets
Search thousands of informative Fact Sheets and publications written for a non-technical audience. Be sure to type "Fact Sheet", "General Information Product" or "Circular" under the "Series Name" box.