Soil liquefaction in Japan
Japan is an island country situated in East Asia. The East Asia is located in the Pacific Ocean. Japan is also called the land of rising sun. The four largest cities in Japan which make about 90 percent of its land area Honshu, Hokkaido, Kyushu, and Shikoku. As of now, Japan has a population of 126 million which is the tenth largest in the world. Japan is a country where earthquakes and Tsunami and different natural calamities are very frequent. The capital of the Japan in Tokyo. It is the highly populated city of Japan with 9.1 million people living in Tokyo.
Japan is a stratovolcanic archipelago of 6,852 islands. Japan shares border with China, North Korea, South Korea and Russia. Japan seems a small country but it is even more powerful. It is a part of UN, the G7, the G8, and the G20. The country is also the world fourth largest economy around the world.
The below video is from 2011 when the earthquake of 9 magnitudes hit Japan. The earthquake vibration is so high that it caused large underwater dunes on the seafloor. The situation is very scary. Soil liquefaction is very common in Japan. There are many facts about Soil liquefaction that you don’t know. Let me list them first before you watch the video,
1. It is also called earthquake liquefaction.
2. In the process of liquefaction, soil acts as a viscous liquid. It generally happens in water saturated areas affected by seismic S-waves or secondary waves which cause ground vibrations during earthquakes.
3. Soil liquefaction can also contribute to sand blows. They are also known as sand boils or sand volcanoes.
4. It also causes landslides. It happened in Alaska earthquake of 1964.
5. Seismic events can cause dangerous ground conditions that can lead to structural damage and failure resulting in loss of life.
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