Tertiary wave Tertiary waveseismic energy that has been converted into acoustic energy in the ocean. Also known as a T-wave”.”””Related Articles: Decoding the hum of submarine volcanic eruptionsCTBT Hydrophone StationHow is sound used to study undersea earthquakes?How is sound used to study underwater volcanoes? Chris Knowlton2017-02-26T20:10:12-05:00