International Slate's Explainer: Quakes and Earth's Rotation By Andy Bowers Published December 27, 2004 at 9:00 PM PST This story was published more than 19 years ago. Facebook WhatsApp Email Listen • 0:00 Slate senior editor Andy Bowers explains how Sunday's 9.0 earthquake beneath the Indian Ocean was powerful enough to affect the Earth's rotation. Copyright 2004 NPR