“The length of the day should have gotten shorter by 1.26 microseconds (millionths of a second),” Richard Gross, a geophysicist at NASA’s Jet Propulsion Laboratory in Pasadena, California, told Bloomberg.com. “The axis about which the Earth’s mass is balanced should have moved by 2.7 milliarcseconds (about 8 centimeters or 3 inches).”
The deadly earthquake in Chile last week made the earth “ring like a bell” and likely shortened our day, scientists say. Similar to the earthquake in 2004 that caused the massive Indian Ocean tsunami, the Chilean earthquake was large enough to change the distribution of mass on the earth’s surface, which could lead to a shift of the earth’s axis.
The quake made the earth ring like a bell, said Andreas Rietbrock, a professor of Earth Sciences at the U.K.’s Liverpool University, and if our days just got a little shorter, the change is permanent said Benjamin Fong Chao, dean of Earth Sciences of the National Central University in Taiwan.