Tuesday, April 3, 2012

Experts Predict Over Seventy-Ft. Tall Tsunami Wave in Central Japan

Protesters halt distribution of Japan government 'radioactive debris sharing' pamphlet


[Photo-Image: 9.0 Japan Quake tsunami global propagation wave animation, Source: NOAA Center for Tsunami Research video]

Dire news from an expert panel under Japan?s Cabinet Office, the prediction an over 70 ft.?20 meters? tall tsunami wave could strike Central Japan after a magnitude 9.0 offshore Pacific quake.

In late January, 2012, Japanese experts predicted a ?significant earthquake? will strike Tokyo within the next four years, a 75% probability of a magnitude 7 earthquake.

The report from Fukushima Diary of an intense protest in Kyodo against the Japan government plan of sharing ?radioactive debris?. The protest halted the distribution of radioactive debris sharing pamphlets to Japan citizens.


[Photo-Image: Japan government pamphlet on 'sharing radioactive debris', Source-Fukushima Diary]

Posted below, two NOAA videos related to the March 11, 2011, 9.0 magnitude Japan (Honshu) earthquake and tsunami: The NOAA Center for Tsunami Research video, animation of the global wave propagation of the March 11, 2011, tsunami, and, the NOAA Vents Program at Pacific Marine Environmental Laboratory and Oregon State University underwater recording of the earthquake, the ?the largest source of ocean sound ever recorded?.

Mainichi News, Offshore Pacific quake could cause over-20m tsunami in central Japan,

[Snip]

In its previous estimate in 2003 the panel had said no areas would be struck by tsunami higher than 20 meters. In light of the March 2011 disaster, however, it revised its projection assuming a magnitude 9 earthquake.

According to the new projection, there would be huge tsunami in areas from the Kanto region centering on Tokyo to the Kyushu region in southwest Japan in the event a massive quake occurred in the trough.

A tsunami of up to 34.4 meters might hit Kuroshio, Kochi Prefecture, while tsunami between 10 and 20 meters could strike parts of Shizuoka, Kochi and Miyazaki prefectures. Shizuoka is southwest of Tokyo and has a nuclear power plant.

Near the Hamaoka nuclear plant, now offline, a tsunami of 21 meters is anticipated, the panel said. The operator Chubu Electric Power Co. is working on building an anti-tsunami breakwater near the plant, but its planned height is only 18 meters.

The March 11, 2011, magnitude 9.0 Japan Honshu earthquake, an undersea megathrust earthquake, struck off the northeast coast of Japan in the Japan Trench Subduction Zone. One year after the massive quake and devastating tsunami researchers found the wave height of the tsunami at the Fukushima Nuclear Power Plant No. 1 was 68-ft (21 meters).


NOAA Center For Tsunami Research March 11, 2011 Honshu, Japan Tsunami Global Propagation Video

Animation of the Honshu, Japan Mw=9.0 tsunami of 11 March 2011 05: 46 UTC. Wave propagation results from NOAA?s forecast model, and maximum amplitude and wave arrival time (final frames)

An underwater microphone?undersea hyrdophone?located nine hundred miles from the epicenter in the Aleutian Islands recorded the sound of the March 11, 2011, 9.0 magnitude Japan Honshu earthquake.

NOAA Vents Program:

The Japan earthquake was the largest source of ocean sound ever recorded on our hydrophone arrays. This unique record gives us insight into the physics behind how sound is transmitted from the Earth?s crust into the ocean and then propagates through the Pacific Ocean basin. These insights help us gauge the size and scale of other submarine earthquakes and volcanic eruptions we record that were not detected by other sensor networks. We also plan to analyze the hydrophone record for evidence of a pressure signal from the tsunami, which will provide additional information and help our understanding of tsunami propagation in the ocean.

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Tags: earthquakes, Japan Earthquake, Prediction, Tsuanami

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