Alternative definitions (1), class: vernacular (0)
Term: substorm

A geomagnetic perturbation lasting 1 to 2 hours, which tends to occur during local post-midnight nighttime. The magnitude of the substorm is largest in the auroral zone, potentially reaching several thousand nanotesla. A substorm corresponds to an injection of charged particles from the magnetotail into the auroral oval.

Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan