00:0080% of the Japanese population lives in Tokyo, a strip of land between the mountains and
00:08the sea.
00:10Scenes like this are common, but always intense.
00:19Intensity lets us accurately measure how, in every region, each place was shaken.
00:25In Japan, seismic intensity is measured on the Shindo scale.
00:30The higher the level, the greater the damage.
00:33At 4 on the Shindo scale, people are frightened.
00:38Most sleeping people wake up.
00:41At 5, people find it difficult to move.
00:45Many unreinforced walls collapse.
00:48At 6, certain buildings lose their roof tiles and their windows break.
00:54At 7, walls collapse.
00:59As you see on this map, the red shows where earthquakes are biggest.
01:03Blue zones correspond to areas that don't feel too many quakes.
01:07It's ironic, but the places where it's easiest to build and live are the same areas that
01:12are most susceptible to earthquakes.
01:15Tokyo's terrain is mostly flat, but it's right at the most dangerous zone.
01:21Yet, this is the capital of Japan.
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