
A strong earthquake struck central Japan early Sunday.
At least 22 people were injured.
Authorities warned of possible strong aftershocks in the coming days.
A strong earthquake shook central Japan early Sunday, shattering store windows and sending people fleeing buildings.
Meteorological Agency on the Risk: "Please be on the lookout for mudslides, falling rocks, and the possible effects from rainfall." — Ayataka Ebita, Japan Meteorological Agency official.
Focus Area: The earthquake in central Japan, its damage and injuries, and the warning of further strong quakes.
The Japan Meteorological Agency put the quake's magnitude at 5.7, while the US Geological Survey reported 5.5. It struck at 1:04 a.m. about 40 kilometers below the surface in Shizuoka Prefecture, with the most violent shaking felt in neighboring Aichi.
It was not felt in Tokyo. A wide area was affected, including Hamamatsu, Kyoto, Nara, and the prefectures of Yamanashi, home to Mount Fuji, and Gifu. Japanese TV footage showed shattered shop windows and glass strewn across streets and a bookstore with mounds of books thrown from its shelves.
Some of the injured fell down stairs while fleeing. Smaller aftershocks were reported.
The agency warned people to brace for possible strong quakes over the coming week, especially in the next two to three days.
It said no apparent change had been detected so far in the Nankai Trough plate, where scientists say a megaquake could possibly hit.
Shinkansen bullet trains ran at reduced speeds in affected areas as a precaution, since quakes can damage railways.

Japan sits in an earthquake-prone zone, and authorities regularly urge residents to stock bottled water, food, and batteries; plan to shelter under tables; and keep comfortable walking shoes on hand.
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