Seismic Sense

Seismic sense is a skill developed through use of Doton that constitutes for physical sense. This skill enables earthbenders to detect vibrations in the ground to perceive objects, people, and other aspects of their environment, essentially acting as sonar, but through earth and metal.

The first and foremost of seismic sense's applications is the ability to perceive surroundings. By sensing vibrations in the ground, the user can perceive their surroundings as precisely as normal sight, and in some cases with even greater clarity.The advantage of the sense over normal sight is that practitioners are able to pick up things that are barely visible or even imperceptible to the naked eye as well as things out of their line of sight. Obstacles that would normally obstruct regular vision, such as walls and thick dust clouds, are rendered ineffective against seismic sense. Seismic sense does not only provide surface vision, as the vibrations also travel underground, enabling the user to effectively detect caverns and other deep subterranean cavities.

Since humans have a physical reaction when they lie, such as a heightened heart rate, Users who have perfected this skill can lock on to those physiological changes and tell whether or not a person is lying. However, these reactions can be suppressed by individuals with great control over their emotions. If one is made to believe what they say is true, false claims will not trigger any physical reaction. A user must also be actively on the look for reactions for it to be noticed. This ability has been referred to as "truth-seeing".