Alternative definitions (0), class: vernacular (0)
Term: crochet

A sudden deviation in the sunlit geomagnetic field H component (see geomagnetic elements) associated with extra-ordinary solar flare x-ray emission. The effect can be as much as 100 nT and characteristically lasts up to approximately 30 minutes. The event is also known as a SFE (solar flare effect).

Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan