Geomagnetic Jerks Finally Reproduced and Explained (image) CNRS Share Print E-Mail Caption Visualization of the interior of the Earth's core, as represented by a computer simulation model (view of the equatorial plane and a spherical surface near the inner core, seen from the North Pole). Magnetic field lines (in orange) are stretched by turbulent convection (in blue and red). Hydromagnetic waves are emitted from the inner core, and spread along the magnetic field lines up to the core's boundary, where they are focused and give rise to geomagnetic jerks. Credit © Aubert et al./IPGP/CNRS Photo library Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.