That's what is propagated.

Wave propagation refers to the transfer of energy through a medium, such as water or air, in the form of waves. This energy can take many forms, including seismic waves, electromagnetic waves, and mechanical waves. During wave propagation, the energy is transferred from one point to another without the physical movement of the medium itself.

In the context of physics, wave propagation is a fundamental concept that helps us understand various natural phenomena, such as the transmission of sound, light, and seismic waves. For instance, when a stone is thrown into a still pond, the ripples that spread out from the point of impact are a manifestation of wave propagation.

There are several key characteristics that define wave propagation, including amplitude, frequency, wavelength, and speed. Understanding these characteristics is crucial in various fields, such as seismology, optics, and telecommunications.

If you're interested in learning more about wave propagation, I recommend checking out online resources like Khan Academy or Coursera, which offer courses and tutorials on the subject. Additionally, you may find it helpful to explore simulation tools like WaveLab or GeoGebra, which can help you visualize and interact with wave propagation models.