In geophysics, a geomagnetic jerk or secular geomagnetic variation impulse is a relatively sudden change in the second derivative of the Earth's magnetic field with respect to time.
A geomagnetic jerk is a relatively sudden change in the second derivative of the Earth's magnetic field with respect to time. This is in geophysics. Secular geomagnetic variation impulse is a relatively sudden change in the second derivative of the Earth's magnetic field with respect to time. This is in geophysics.