Earthquake rocks Japan
This was one of the most powerful earthquakes recorded in Japanese history, 8.9 magnitude - Leaving Cert Geography - Question A - 2012
Question A
Earthquake rocks Japan
This was one of the most powerful earthquakes recorded in Japanese history, 8.9 magnitude. The tremors were the result of a violent uplift of... show full transcript
Worked Solution & Example Answer:Earthquake rocks Japan
This was one of the most powerful earthquakes recorded in Japanese history, 8.9 magnitude - Leaving Cert Geography - Question A - 2012
Step 1
(i) What was the magnitude of the earthquake?
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Answer
The magnitude of the earthquake was 8.9.
Step 2
(ii) Name the city close to the earthquake.
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Answer
The city close to the earthquake is Sendai.
Step 3
(iii) At what depth did the earthquake occur?
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Answer
The earthquake occurred at a depth of 15 miles below the sea floor.
Step 4
(iv) What speed did the tsunami reach as it moved across the Pacific Ocean?
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The tsunami moved across the Pacific Ocean at a speed of 500 mph.
Step 5
(v) Briefly explain how a tsunami occurs.
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A tsunami occurs when a large volume of water is displaced, typically due to underwater earthquakes, volcanic eruptions, or landslides. The ocean floor shifts suddenly during an earthquake, generating waves that can travel across entire ocean basins. These waves can grow in height as they approach shallower waters near coastlines, leading to devastating impacts when they reach land.
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