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Omen? Waters Near Osaka Bay Japan Turn Pale Yellow

June 13, 2012 – JAPAN – At this moment, people in Osaka and Kobe are tweeting the color of Osaka bay looks strange. From the picture, it looks pale yellow. One follower on the site tweeted: “Moving from parents house to Mikage. Osaka bay looked yellowish when I saw from an eminence. Am afraid it’s a sign.”  From local citizens, it became strange color before the great Hanshin earthquake (1995) as well. They might need to stay informed just in case. –Fukushima Diary

Fish kill: The region is near the area of a recent sardine mega-fish kill. In May of this year, Japanese seismologist warned of the dangers of a tripple-earthquake strike in the area: “If three earthquakes simultaneously occurred along the Nankai Trough located in the seabed off central to western Japan, high-rise buildings in Osaka would be shaken by long-period ground motion five times stronger than that in the Great East Japan Earthquake, researchers have predicted.

A group of researchers with the University of Tokyo made the announcement on May 21 at the Japan Geoscience Union Meeting, currently under way in Chiba. The group also speculates that, if the three temblors — the Tokai, Tonankai and Nankai quakes — took place together, high-rise buildings in Tokyo would be shaken by long-period ground motion twice to three times stronger than that in the Great East Japan Earthquake, which struck northeast Japan on March 11, 2011. The long-period ground motion will be stronger in the Tokai-Tonankai-Nankai earthquake because seismic tremors will be amplified by soft rock and stone deposited along the plate boundaries in the Nankai Trough, according to the researchers.

The announcement is expected to prompt authorities to step up measures to minimize possible effects on urban areas, which host skyscrapers. In their study, the group predicted the intensity of long-period ground motion in the event that magnitude-8.7 triple earthquakes took place along the Nankai Trough simultaneously. In case of seismic movements with a cycle of six seconds, the seismic velocity would be 250 centimeters per second in Osaka’s bay area — five times that in the Great East Japan Earthquake — and 110 to 165 centimeters per second in central Tokyo. The tremors in both cities would also last at least twice as long as the March 11 quake, according to the researchers.” –DU

contribution by Louise M.


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