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Earth sciences

Earth sciences

Gravitational effect reveals earthquake magnitude

01 Dec 2017 Marric Stephens
A photograph of seismic traces recorded at Weston Observatory in Massachusetts, US, showing ground motion caused by the 2011 Tohoku earthquake.
Old news: direct waves arrive later
Disturbances in the Earth’s gravitational field caused by the 2011 Tohoku earthquake have been spo

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Marric Stephens is a freelance science journalist and former materials-science editor at Physics World
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