The earthquake that took more than 700 lives in Chile on 27th Feb 2010 probably have changed the entire Earth’s rotation and shortened the length of days on our planet, a National Aeronautics and Space Administration scientist said.
The quake, the seventh strongest earthquake in recorded history, hit Chile Saturday and should have shortened the length of an Earth day by 1.26 microseconds (millionths of a second), according to research scientist Richard Gross at NASA’s Jet Propulsion Laboratory in Pasadena, Calif.
Richard Gross, a geophysicist at Nasa’s Jet Propulsion Laboratory in Pasadena, California, said the 8.8 magnitude quake could have moved the Earth’s axis by 2.7 milliarcseconds (about 8cm) – enough to shorten a day by about 1.26 microseconds.
A large quake can shift huge amounts of rock and alter the distribution of mass on the planet. When that distribution changes, it changes the rate at which the planet rotates, which determines the length of a day.
The computer model used by Gross and his colleagues to determine the effects of the Chile earthquake effect also found that it should have moved Earth’s figure axis by about 3 inches (8 centimeters or 2.7 milliarcseconds).
Earth’s figure axis is not the same as its north-south axis, which it spins around once every day at a speed of about 1,000 mph (1,604 kilometers per hour). The figure axis is the axis around which Earth’s mass is balanced. It is offset from the Earth’s north-south axis by about 33 feet (10 meters).
Strong earthquakes have altered Earth’s days and its axis in the past. The magnitude-9.1 Sumatran earthquake in 2004, which set off a deadly tsunami, should have shortened Earth’s days by 6.8 microseconds and shifted its axis by about 2.76 inches (7 centimeters, or 2.32 milliarcseconds).
- What Happens in an Internet Minute?
- Microsoft Acquires Nokia’s Devices & Services Business
- Facebook launches Internet.org Initiative To Connect The Unconnected World
- Google Glasses: Specs And Other Details
- What Will The World Look Like When We Connect The Unconnected, Internet Of Everything Info-graphic By Cisco
- Japan: New Internet By 2020! on
- Future Tech: Visible Light Communications on
- Facebook launches Internet.org Initiative To Connect The Unconnected World on
- What Happens in an Internet Minute? on
- What Will The World Look Like When We Connect The Unconnected, Internet Of Everything Info-graphic By Cisco on
CategoriesApple Astronomy Biology Blackberry Cloud Computers Digital Camera Embedded Energy Fiction First Future Gadgets Google GPhone Ideas Innovative Internet iPhone Laptop Life Linux Microsoft Mobile Linux Mobiles Networking Nokia Open Source OS Research Science Science Fiction Services Sky Smart Phone Software Space Storage Super Computing Technology Telecoms Tips & Tricks Trends Video Windows