Displacement wave
A displacement wave is an artificially generated, highly energetic phenomenon, characterized as a polarized magnetic variation.

In 2267,  a form of displacement wave was detected when the  was approaching and then in orbit around the Guardian of Forever's planet. Commander Spock reported to Captain James T. Kirk that their ship was passing through "ripples in time". Kirk then ordered Lieutenant Uhura to report to Starfleet Command that something or someone down on that planet was causing "turbulent waves of space displacement". When Kirk asked Spock again about whether the Enterprise should stay in orbit to investigate, Spock told Kirk that it was of great scientific importance that they maintain orbit to study the waves. As the landing party would soon discover, the waves were caused by the Guardian of Forever, a time portal–like device that refused to answer Kirk's question as to whether it was a being or a machine. ()

In 2371, a highly advanced alien being known as the  used his technology to generate a displacement wave in order to transport several ships to his location in the Delta Quadrant. He transported these ships in a desperate attempt to find a lifeform genetically compatible with himself, in order to procreate to produce an offspring capable of continuing his mission of caring for the Ocampa. Among the vessels transported to the Delta Quadrant were Chakotay's Maquis ship, the Val Jean; the ; the ; a Cardassian  vessel; and the Dreadnought missile. ()

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Energy
Transwarp