Laschamp event

The Laschamp or Laschamps event, also termed the Adams 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 Last Glacial Period. It was discovered from geomagnetic anomalies found in the Laschamps and Olby lava flows near Clermont-Ferrand, France in the 1960s.

The Laschamp event was the first known geomagnetic excursion and remains the most thoroughly studied among the known geomagnetic excursions.

It is named after the village of Laschamps, part of the commune of Saint-Genès-Champanelle in France.

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