The body of a man washed out to sea last month when the tsunami from Japan hit the Northern California coast has been found 330 miles (530 kilometers) north in Oregon near the mouth of the Columbia River, the Oregon State Medical Examiner's Office said Tuesday.

Dental records showed that the body found April 2 at Fort Stevens State Park by a person walking on the beach is Dustin Douglas Weber, 25, who disappeared three weeks earlier, authorities said.

"It was just somebody who made a mistake, not knowing what was going on," John Weber, said of his son's death.

The time the surge was predicted to hit the coast, 7:30 a.m., had passed.

"As far as they knew, it was all over with," Joe Weber said. "The wave came in and that was it."

Dustin Weber was the first person killed by a tsunami on the West Coast since 1964, when 11 people in nearby Crescent City, California, died from the surge created by an earthquake in Alaska.

Thinking the initial tsunami surge had passed and that subsequent waves would be small, Dustin Weber hiked with two new friends from off the reservation down a steep and narrow path that winds through thick brush. It runs past a rock formation said to resemble a Yurok woman with a basket on her back, to a small rocky beach on the north side of the Klamath River, family members have said. His two new friends tried to save him, but couldn't.

The currents along the shore would usually take a body to the south. But the tsunami would have taken it far out to sea, where it was pushed north by the winds from winter storms that have been unusually numerous and intense this year, said Humboldt State University tsunami expert Lori Dengler.

The biggest of the tsunami surges measured 8.1 feet (2.5 meters) in the harbor at Crescent City, about 20 miles (30 kilometers) north.