Gravity waves could help scientists detect earthquakes faster

Previous research has shown that the magnitude 9.0 Tohoku quake that struck Japan in 2011 was powerful enough to slightly alter the affected area’s pull of gravity. On the ground (where the gravitational shifts are barely noticeable), it took 3 hours for the Japan Meteorological Agency to gauge its true size, after initially estimating it to be magnitude 7.9. The new study suggests gravity