Source: wikibot/chandler-wobble
= Chandler wobble
{wiki=Chandler_wobble}
The Chandler wobble is a small oscillation in the Earth's rotation axis. Named after American astronomer Seth Carlo Chandler, who discovered it in the late 19th century, this wobble involves a periodic movement of about 9 meters (30 feet) in the Earth's rotation axis relative to its surface, with a cycle of roughly 433 days.