sudden impulse

Alternative definitions (0), class: vernacular (0)
Term: sudden impulse

A sudden perturbation, positive or negative, of several nanotesla in the northward component (see geomagnetic elements) of the low-latitude geomagnetic field, not associated with a following geomagnetic storm. (An SI becomes an SC if a storm follows.)

Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan