Evidence for a geomagnetic jerk in 1990 across Europe

The analysis of geomagnetic data from magnetic observatories demonstrated the existence of very rapid changes, or jerks, in the secular variation, especially the occurrence of the Drain Collector Hose well known geomagnetic jerks of 1969 and 1978.A new geomagnetic jerk seems to have appeared around 1990 and is clearly visible at a selec- tion of Eu

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