Yesterday, one of research group of the Ministry of Education and Science raised the level of the intense of the shake that may happens when earthquake happens under the neath of Tokyo area from 6 to 7.
This research group made field surveyed the geological layer beneath of Tokyo area and found out that the expected epicenter would be 10km more shallow (closer to the surface) than expected before.
The level7 is the strongest level of the shake that meteorological bureau defines.
The difference is huge. When level7 earthquake hits, wooden pillar housing will be collapse instantly, if additional reinforcement is not done.
You can't move because of the intense shake of the ground, or building.
And furniture in house will fall or fly over anywhere. (The more light the furniture is, the more the possibility of the furniture fly. The typical furniture that is considered light is appliance like TV, DVD or bookshelf etc.)
It is said that the possibility to happen this level of earthquake hit Tokyo within coming two or three decades is over 40%.
So, lock the furniture to the wall, and put a special sticker under those appliance. It was proved that those small improvement makes huge difference.
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