January 23, 2012, 7:10 PM JST By Yoree Koh
Tokyo University researchers said there has been a more-than-five-fold jump in the number of earthquakes measuring magnitude 6 or below in the Tokyo area since March 11. In all, there have been 577 earthquakes registering a magnitude-5 or above in Japan from March 11 to the end of 2011, about four times the average annual amount logged between 1996-2005, according to the JMA
the more small tremors there are, the greater the probability a devastating one will hit.
http://www.japanquakemap.com/?lang=jp
Researchers at Tokyo University’s Earthquake Research Institute said there’s a 70% probability the long-feared “big one” 7+ quake will hit the southern Kanto region, which includes Tokyo’s neon-lit jungle, by 2016. It’s an ominous consequence of last year’s game-changing magnitude 9.0 earthquake, the most powerful recorded to hit Japan. University researchers now say the odds of Tokyo or outlying suburban areas getting hit with such a powerful quake in 30 years are now 98%.
The last big quake to hit Tokyo was the Great Kanto earthquake, a magnitude-7.9 jolt that struck on Sept. 1, 1923. About 105,0000 were killed in the Tokyo metropolitan area, many of which were caused by crumbling houses and fires that quickly engulfed the city. Officials say stricter building codes and new technologies developed over the years would curb significantly the toll.
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