Another 7.1 Quake Hits Japan

A fresh tsunami warning has been issued in Japan following a powerful 7.1-magnitude aftershock off the northeast coast today. Tokyo's international airport was shut briefly and shoppers at an electronics store in central Sendai screamed and raced outside, but returned after a short time when windows stopped rattling, reports AP. A warning was issued for a 3-foot tsunami, similar to the one issued after last week's temblor.

The tsunami last week never materialized, but four people were killed in the shaker and a leak opened in the Onagawa nuclear power complex. Today's aftershock came on the one-month anniversary of the massive 9.0-magnitude quake that staggered the nation and landed it in the middle of a nuclear reactor nightmare. (More Japan stories.)