A strong earthquake with a preliminary magnitude of 5.3 jolted central Japan Sunday, but there was no danger of a tsunami, the Meteorological Agency said.The following are some facts about Japan and earthquakes.
• Japan, situated on the "Ring of Fire" arc of volcanoes and oceanic trenches that partly encircles the Pacific Basin, accounts for about 20 percent of the world's earthquakes of magnitude 6 or greater.
• A tremor occurs in Japan at least every five minutes, and each year there are up to 2,000 quakes that can be felt by people.
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