Earth's rotation may help predict quakes 5 yrs early: Study
US-based geophysicists have found evidence that variation in day lengths due to slowing down of Earth's rotation velocity precedes major earthquakes by 5-6 years. The researchers noticed a 25-30% increase in magnitude-7 earthquakes on five occasions in the past century, coinciding with angular deceleration. The correlation could lead to earthquake prediction five years ahead of the actual event.