Futaba Kosei Hospital patients who might have been exposed to radiation are carried into the compound of Fukushima Gender Equality Centre in Nihonmatsu in Fukushima Prefecture last month.  (Photo: AP Photo/The Yomiuri Shimbun, Daisuke Tomita) 

HONOLULU (AP) — U.S. officials say a 7.4-magnitude earthquake off the coast of Japan is not expected to create a tsunami threat in Hawaii or the West Coast.

Federal agencies say that area includes Hawaii, California, Oregon, Washington, Alaska and British Columbia, Canada.

No tsunami warning, watch or advisory is in effect for these areas.

The Japan meteorological agency issued a tsunami warning for a wave of up to about 3 feet. The warning was issued for a coastal area of Japan already torn apart by last month's tsunami.

Buildings as far away as Tokyo shook for about a minute.

Hundreds of aftershocks have shaken the northeast region devastated by the March 11 earthquake, but few have been stronger than 7.0.