geomagnetic reversal
1Geomagnetic reversal — Magnetic reversal redirects here. For switching of a magnet, see Magnetization reversal. Geomagnetic polarity during the late Cenozoic Era. Dark areas denote periods where the polarity matches today s polarity, light areas denote periods where… …
2geomagnetic reversal — Alternation of the Earth s magnetic polarity. The Earth s internal magnetic field reverses, on average, about every 300,000 to 1 million years. This reversal is very sudden on a geologic time scale, apparently taking about 5,000 years. The time… …
3Geomagnetic pole — Illustration of the difference between geomagnetic poles (Nm and Sm) and geographical poles (Ng and Sg). The geomagnetic poles are antipodal points where the axis of a theoretical dipole intersects the Earth s surface. This dipole is equivalent… …
4geomagnetic field — Magnetic field associated with the Earth. It is essentially dipolar (i.e., it has two poles, the northern and southern magnetic poles) on the Earth s surface. Away from the surface, the field becomes distorted. Most geomagnetists explain the… …
5Geomagnetic excursion — A geomagnetic excursion, like a geomagnetic reversal, is a significant change in the Earth s magnetic field. Unlike reversals however, an excursion does not change the large scale orientation of the field, but rather represents a dramatic,… …
6Geomagnetic storm — This article is about disturbances within Earth s magnetosphere. For other uses of magnetic storm , see Magnetic storm (disambiguation). Solar particles interact with Earth s magnetosphere. A geomagnetic storm is a temporary disturbance of the… …
7Brunhes-Matuyama reversal — The Brunhes Matuyama Reversal was a geologic event, approximately 780,000 years ago, when the Earth s magnetic field last underwent reversal. The reversal occurred over several thousand years. The apparent duration at any particular location… …
8Gauss-Matuyama reversal — The Gauss Matuyama Reversal was a geologic event approximately 2.588 million years ago when the Earth s magnetic field underwent reversal.This event, which separates the Piacenzian from the Gelasian and marks the start of the Quaternary… …
9Jaramillo reversal — The Jaramillo reversal was a reversal of the Earth s magnetic field that occurred approximately one million years ago. In the geological time scale it was a short term positive reversal in the then dominant Matuyama reversed magnetic chronozone;… …
102012 phenomenon — Part of a series on …
