"Japanese researchers have warned of a 70 percent chance that a magnitude-seven earthquake will strike Tokyo within four years, a report said Monday -- much higher than previous estimates.

Researchers at the University of Tokyo's earthquake research institute based the figure on data from the growing number of tremors in the capital since last year's March 11 earthquake off northeast Japan, the Yomiuri Shimbun reported.

According to the meteorological agency, an average of 1.48 earthquakes with magnitudes ranging from three to six have occurred per day in and near Tokyo since March."

AFP had the story January 23, 2012. [2]

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"Major Tokyo Quake More Likely Than Government Says: Academics " (Reuters) [3]