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The Laschamp or Laschamps event was a geomagnetic excursion (a short reversal of the Earth's magnetic field). It occurred between 42,200 and 41,500 years ago, during the end of the Last Glacial Period. It was discovered from geomagnetic anomalies found in the Laschamps and Olby lava flows near Clermont-Ferrand, France in the 1960s. [1] [2]
The rate of reversals in the Earth's magnetic field has varied widely over time. Around 72 Ma , the field reversed 5 times in a million years. In a 4-million-year period centered on 54 Ma , there were 10 reversals; at around 42 Ma , 17 reversals took place in the span of 3 million years.
The last time the poles reversed was 780,000 years ago so it’s not like we have a record for this. Turns out 780,000 years is over double the time Earth usually takes between flips.
The following is a list of geomagnetic reversals, showing the ages of the beginning and end of each period of normal polarity (where the polarity matches the current direction).
The Earth's magnetic North Pole is currently moving toward Russia in a way that British scientists have not seen before. ... before slowing in the last five years to about 22 miles per year ...
According to a new study, Earth's magnetic poles flipped 42,000 years ago, triggering dramatic changes in temperatures and radiation levels.
The geographic poles are defined by the points on the surface of Earth that are intersected by the axis of rotation. The pole shift hypothesis describes a change in location of these poles with respect to the underlying surface – a phenomenon distinct from the changes in axial orientation with respect to the plane of the ecliptic that are caused by precession and nutation, and is an ...
The Earth’s geomagnetic field, which scientists have been warning about for hundreds of years, isn’t about to suddenly flip over after all, according to a new The Earth's magnetic poles ...