Posted on 03/11/2011 5:16:58 AM PST by NYer
Japan has legally mandated extensive preparedness for any kind of earthquakes. That this strong off-coast earthquake resulted in no casualty might be due to that.
The country also has a unique seismic intensity scale called "Shindo" in addition to the magnitude scale. Magnitude is the released energy itself; intensity is the local effects of that energy. The recent M7+ earthquake most affected the northern part, where Shindo 5-lower was felt (the highest value being 7).
The video shows swarms and successions of earthquakes on March 9 and the individual tells viewers to be prepared as he has not seen this level of activity in a long, long time. Excellent analysis of visual data!
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