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The Laschamp or Laschamps, also termed the Adams event [1], 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 .
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 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 North magnetic pole is approximately 965 kilometres (600 mi) from the geographic North Pole. The pole drifts considerably each day, which results in a change of 5-60 km per year. The speed of the change was around 10 km/year for the majority of the 20th century, then increased in the 1990s to over 50 km/year, but slowed down slightly after ...
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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 ...
A geomagnetic excursion, like a geomagnetic reversal, is a significant change in the Earth's magnetic field.Unlike reversals, an excursion is not a long-term re-orientation of the large-scale field, but rather represents a dramatic, typically a (geologically) short-lived change in field intensity, with a variation in pole orientation of up to 45° from the previous position.
Every 8.5 years the Earth's core wobbles, resulting in a mysterious ‘signal.’ A new study attempts to explain this geophysical mystery. Every 8.5 Years, Earth's Core Mysteriously Wobbles.