The Japanese government estimated 1.5 million tons of debris was floating in the ocean in the immediate aftermath of the disaster, which devastated a long stretch of Japan's northeastern coast and killed thousands of people. But it's not clear how...

Scientists from Oregon State University, who have examined more than three dozen pieces of debris from the 2011 Japanese tsunami that have washed ashore on the Northwest coast, say the potential damage from invasive species may not be known for years.

Workers pulled a 1-ton boat from the sand Wednesday and disposed of the tsunami debris in a landfill.

The dock that washed ashore on a remote Washington beach last month has been confirmed as debris from the March 2011 tsunami in Japan.

A scientist who examined the dock that recently washed ashore on Washington's Olympic Peninsula says it looks just like the one that came ashore on a central Oregon beach last summer, suggesting it also is a piece of tsunami debris from Japan.

The Coast Guard on Tuesday spotted a large dock that has washed ashore in a remote section of Olympic National Park on the northwest Washington coast. Scientists are concerned it could be debris from the tsunami that struck Japan last year.

Federal, state and tribal officials are attempting to track a large dock that was reported drifting off the coast of Washington state, one of potentially hundreds of objects that could wash up along the West Coast from the tsunami that struck Japan last year.

It doesn't matter if the earth sways in Chile, Alaska or Japan, the formation of the sea floor along the U.S. West Coast generally aims any tsunami surges at the tiny California port town of Crescent City.

The final piece of a concrete dock that floated from Japan to an Oregon beach is on its way to be salvaged.

After some initial glitches, work went smoothly Friday on cutting up the box-car sized concrete dock that floated up on an Oregon beach after breaking loose from a Japanese fishing port during last year's tsunami.

The 66-foot long dock, which is almost 20 feet wide and 7 feet high and mostly made of concrete, broke loose from moorings in Japan during the massive earthquake and tsunami that hit the island nation in March of 2011.