Reuters —

An earthquake with a preliminary magnitude of 7.1 struck Japan’s southern Kumamoto prefecture on Tuesday, knocking out power to ​thousands of homes, stopping rail services and triggering warnings for tsunamis and aftershocks.

Companies including Sony and TSMC, the world’s largest contract ⁠chipmaker, have plants in the area of the quake.

A Sony spokesperson said the company was checking the situation. TSMC did not ⁠immediately respond to a request for comment.

The Japanese government issued emergency earthquake warnings for Kumamoto, Nagasaki, Kagoshima, Fukuoka, Saga, Oita, and Miyazaki prefectures, all on Japan’s southern Kyushu island. ‌A tsunami warning for ⁠a wave measuring 1 m (3.28 feet) was issued after the earthquake, the Japan Meteorological Agency said.