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Earthquakes occur along faults, which are fractures between blocks of rock that allow the blocks to move relative to one another. Faults are caused by the bumping and sliding that plates do and ...
An curved arrow pointing right. The US Geological Survey (USGS) estimates that millions of earthquakes occur every year, but only one of them will be a "great earthquake" — that is, one with a ...
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Earthquakes happen all the time, you just can't feel them. A guide to how they're measuredAbout 55 earthquakes a day – 20,000 a year – are recorded by the National Earthquake Information Center. Most are tiny and barely noticed by people living where they happen. But some are ...
What are earthquakes and why do they happen in certain parts of the world? The Earth's crust is broken up into several pieces called tectonic plates, which fit together like a jigsaw puzzle.
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