Scientists discover Earth s core is growing lopsided - and solve a 30-year mystery msn.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from msn.com Daily Mail and Mail on Sunday newspapers.
Scientists discover Earth s core is growing lopsided - and solve a 30 year-old mystery independent.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from independent.co.uk Daily Mail and Mail on Sunday newspapers.
For reasons unknown, Earth's solid-iron inner core is growing faster on one side than the other, and it has been ever since it started to freeze out from molten iron more than half a billion years ago, according to a new study by seismologists at.
For reasons unknown, Earth’s solid-iron inner core is growing faster on one side than the other, and it has been ever since it started to freeze out from
Seismic waves generated by earthquakes travel through Earth s solid iron inner core faster in the direction of the rotation axis than along the equator. UC Berkeley scientists created a core growth model to explain this. To fit seismic data, the model predicts that asymmetric growth of the core leads to crystal movement that preferentially aligns iron-nickel crystals north-south. The model implies that the core is only 0.5-1.5 billion years old, a fraction of Earth s age.