A 6.4-magnitude temblor jolted Shizuoka Prefecture and its vicinity, including Tokyo, on Tuesday evening, serving notice that Friday's unfolding tragedy in the Tohoku region may not be over.

No tsunami warning was issued and no major damage was reported at the Hamaoka nuclear plant in Omaezaki, Shizuoka Prefecture, or at Shizuoka Airport, according to Chubu Electric Power Co. and local police.

A total of 29 people were taken to hospitals by ambulance following the quake at 10:31 p.m. Two were seriously hurt and 27 had suffered minor injuries, local authorities said.