Magnitude-7.3 quake rocks Japan; no damage reported

TOKYO -- A magnitude 7.3 earthquake struck offshore of Japan's crippled nuclear power plant early Saturday, triggering small tsunamis but causing no damage.

An earthquake official with the Japan Meteorological Agency said the quake was an aftershock of the magnitude-9.0 earthquake and tsunami that struck the same area in 2011, killing about 19,000 people and devastating the Fukushima Dai-Ichi nuclear power plant.

There was no damage and only one minor injury was reported, the national Fire and Disaster Management Agency said.

Tsunamis of up to 15 inches hit four areas along the coast, but a tsunami advisory was lifted less than two hours after the quake.

The epicenter of the 2:10 a.m. Tokyo time quake was about 170 miles off Fukushima, and it was felt in Tokyo, 300 miles away.

"It was fairly big, and rattled quite a bit, but nothing fell to the floor or broke. We've had quakes of this magnitude before," Satoshi Mizuno, an official with the Fukushima prefectural government's disaster management department, said by phone.

"Luckily, the quake's center was very far off the coast," Mizuno said.

Mizuno said the operator of the troubled Fukushima plant, Tokyo Electric Power Co., said no damage or abnormalities had been found.

Japan's meteorological agency issued a 3-foot tsunami advisory for a long stretch of Japan's northeastern coast. It put the quake's magnitude at 7.1, while the U.S. Geological Survey recorded a magnitude of 7.3. The U.S. Pacific Tsunami Warning Center did not post warnings for the rest of the Pacific.

The meteorological agency reported tsunamis of 15 inches in Kuji in Iwate prefecture and Soma in Fukushima, as well as an 8-inch tsunami at Ofunato in Iwate and a 12-inch tsunami at Ishinomaki in Miyagi prefecture.

All of Japan's 50 nuclear reactors remain offline as the government decides whether they meet more stringent requirement enacted after the 2011 quake, which triggered multiple meltdowns and massive radiation leaks at the Fukushima plant about 160 miles northeast of Tokyo.

A string of mishaps this year at the Fukushima plant has raised international concerns about the operator's ability to tackle the continuing crisis.

Nuclear Regulation Authority chairman Shinichi Tanaka has scheduled a Monday meeting with Tokyo Electric's president to seek solutions to what he says appear to be fundamental problems.