| 1 | A scalar wave tends to propagate as a transverse wave or a standing wave. | |
| 2 | Normally the shear velocity is about half of the compressional velocity. | |
| 3 | In borehole sonic logging, these may be the shear, flexural and Stoneley waves. | |
| 4 | With the development of modern well-logging techniques, direct shear wave logging has become an increasingly important tool in exploration and production geophysics . | |
| 5 | Gravitons, like photons, are transverse waves: they oscillate perpendicular to their direction of propagation. |