| Detecting the primary waves from an earthquake is like seeing the flash of lightning before hearing the thunder and getting drenched by the rain. |
| The two-dimensional experimental scheme, which contains just three transmitters with broadband modulation of two primary waves and one receiver, is proposed. |
| Farfield expression of the primary waves are employed in the method to approximate the primary fields. |
| Earthquakes produce three main types of waves primary waves, secondary waves, and surface waves. |
| Elliott's Principle is based on the conception that each of these primary waves together forming a complete movement can be sub-divided into waves of the next smaller degree. |
| In school we learned that primary waves can travel through solids, liquids, and gases. |
