US researchers develop new explanation for destructive earthquakes

Geophysicists at Brown University have a new explanation for how those high-frequency vibrations of earthquakes may be produced, according to a new study published Tuesday. Earthquakes produce seismic waves with a range of frequencies, from the long, rolling motions that make skyscrapers sway, to the jerky, high-frequency vibrations that cause tremendous damage to houses and other smaller structures, the Xinhua news agency.

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