Japan faces 1,500 earthquakes a year. Why its cities rarely collapse
Why Japan experiences so many earthquakes Japan's buildings are designed to move, not fight the earthquake Strict building codes have saved countless lives Every major
Why Japan experiences so many earthquakes Japan's buildings are designed to move, not fight the earthquake Strict building codes have saved countless lives Every major earthquake makes Japan safer Japan has one of the world's fastest earthquake warning systems Even bullet trains automatically stop Earthquake drills are part of everyday life Ancient Japanese architecture also inspired modern engineering The real reason Japan's cities stay standing Japan experiences around 1,500 earthquakes that are strong enough to be felt every year, a staggering figure that would seem disastrous for most countries. Yet, despite sitting at one of the most seismically active places on Earth, Japan's cities rarely witness widespread building collapses after major earthquakes. The contrast became even more striking after recent earthquakes in other parts of the world, where buildings crumbled and lives were lost. So, what makes Japan different? The answer lies not in luck, but in decades of scientific research, world-leading engineering, strict building regulations, cutting-edge technology, and a culture of preparedness that has transformed one of nature's greatest threats into a manageable risk.Japan's location is both its greatest geographical challenge and the reason behind its extraordinary earthquake resilience. The country sits at the intersection of four major tectonic plates: the Pacific Plate, the Philippine Sea Plate, the Eurasian Plate and the North American (or Okhotsk microplate, according to some geological models). These plates are constantly moving, colliding and sliding beneath one another.According to the United States Geological Survey, around 10 per cent of the world's earthquakes and nearly 20 per cent of earthquakes measuring magnitude 6 or greater occur in and around Japan.
The country records thousands of seismic events annually, although only about 1,500 are strong enough to be noticed by people.One of Japan's greatest engineering achievements is that its buildings are designed to move with the earthquake rather than resist it rigidly.Modern Japanese skyscrapers and many public buildings use a technology known as base isolation. Thick layers of rubber and steel bearings are installed between a building's foundation and its superstructure. During an earthquake, these bearings absorb much of the ground motion before it reaches the building above.Another widely used technology is seismic dampers, often compared to the shock absorbers in a car. These devices dissipate the energy generated by earthquake vibrations, reducing how much a building sways.Research published by the Research Institute for Earth Science and Disaster Resilience has shown that base-isolated buildings experience significantly lower shaking than conventional structures during strong earthquakes. Today, thousands of buildings across Japan incorporate some form of seismic isolation or energy-dissipation technology.Japan's building regulations are among the strictest in the world, but they were shaped through painful lessons.The devastating Great Kantō earthquake killed more than 100,000 people and exposed weaknesses in urban construction. Decades later, the Great Hanshin earthquake prompted another major overhaul of earthquake-resistant standards after over 6,000 people lost their lives.Following these disasters, Japan introduced increasingly rigorous seismic design requirements. Buildings constructed under modern standards must withstand strong shaking without collapsing, even if they sustain damage.The result has been remarkable. During the 2011 Tōhoku earthquake and tsunami, one of the most powerful earthquakes ever recorded, relatively few modern buildings collapsed due to the shaking itself.
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