Sea-floor spreading was discovered by examining the effects of these events upon iron-containing rocks at the ocean's floor.
One of the shortest of these events is named after the village of Laschamp. The Jurassic Quiet Zone is a span of time during which these events happened very often or not at all. The cause of these events is also the cause of the intensifying South Atlantic Anomaly, where the van Allen belts are coming closer to the Earth. The effects of these events create "stripes" validating the Vine-Matthews-Morley hypothesis. Simulations of the geodynamo predict the timing of these events. Sea-floor spreading was discovered by examining the effects of these events upon iron-containing rocks at the ocean's floor. For 10 points, name these events in which the north and south pole swap places.
One of the shortest of these events is named after the village of Laschamp.
geomagnetic reversal [accept descriptions such as Earth's magnetic field flipping]