https://www.bas.ac.uk/data/our-data/publication/on-the-association-between-northward-turnings-of-the-interplanetary-magnetic-field-and-substorm-onsets/
On the association between northward turnings of the interplanetary magnetic field and substorm...
We re-examine whether substorms are triggered by solar wind fluctuations or an internal magnetospheric instability by comparing the statistical associations...
interplanetary magnetic fieldon the
https://www.qsl.net/4x4xm/FAQ/What-is-the-Interplanetary-Magnetic-Field.htm
What is the Interplanetary Magnetic Field?
The Interplanetary Magnetic Field (IMF) is the extension of the Sun's magnetic field into space, carried by the solar wind
what isinterplanetarymagneticfield