1. A small, rapid fluctuation or pulsation, especially in physical systems such as electrical currents, magnetic fields, or mechanical vibrations.
Usage: technical; often used in geophysics and engineering contexts
2. In geophysics, a small-amplitude oscillation in Earth's magnetic field, typically with periods of seconds to minutes.
Usage: specialized; geophysics

Examples

• The instrument detected micropulsations in the electrical signal with a frequency of several hertz.
• Researchers studied micropulsations in the Earth's magnetosphere to understand solar wind interactions.
• Micropulsations in the power grid can affect sensitive electronic equipment.
• The sensor recorded micropulsations lasting only a few seconds.
• Geophysicists use magnetometers to measure micropulsations in the magnetic field.