Natural disasters in Japan - The great east Japan disaster
3 important questions on Natural disasters in Japan - The great east Japan disaster
What is the Richter scale?
The scale on which we measure the magnitude of an earthquake
How do you measure the magnitude of an earthquake?
With a seismograph.
When does a tsunami become dangerous and why?
A tsunamis is only dangerous when it reaches the coast.
Here the water gets shallow.
This slows (the front) of the wave while the water behind it keeps coming.
the water rises and forms a wall of water.
The crest of the wave overtakes the trough in front of it
Here the water gets shallow.
This slows (the front) of the wave while the water behind it keeps coming.
the water rises and forms a wall of water.
The crest of the wave overtakes the trough in front of it
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