A strong earthquake with a preliminary magnitude of 6.5 shook Shizuoka Prefecture and its vicinity, including the Tokyo metropolitan area, Aug. 11, injuring 112 people and causing two nuclear reactors to automatically shut down.

Passengers wait for bullet trains to resume service at JR Tokyo Station on Aug. 11. KYODO PHOTO

The Meteorological Agency said while the 5:07 a.m. temblor will not lead to the massive quake feared to hit the Tokai region sometime in the future — the so-called Tokai quake — it will further study the data on the quake deformation.

There were no reports of deaths or missing people, according to the National Police Agency, but more than 110 people in the quake-hit areas were injured, some seriously, local authorities said.

The quake, which originated about 23 km under the surface of the sea in Suruga Bay, measured a lower 6 on the Japanese seismic scale to 7 at several points in Shizuoka, including Izu, Yaizu, Omaezaki and Makinohara, according to the agency.

It was the first time since 1944 that a quake stronger than 6 on the seismic scale was observed in Shizuoka Prefecture.

The No. 4 and No. 5 nuclear reactors at the Hamaoka nuclear plant in Omaezaki were automatically halted, and the radioactive level at the No. 5 reactor building temporarily went up, although there was no leakage, Chubu Electric Power Co. said.

Central Japan Railway Co. (JR Tokai) suspended shinkansen operations for two hours from 6 a.m., and halted local trains in Shizuoka and parts of Nagano Prefecture.

About a 100-meter stretch of the shoulder and adjacent lane on the Tomei Expressway collapsed in Makinohara, Shizuoka Prefecture.