Acoustic-Gravity Lamb Waves from the Eruption of the Hunga-Tonga-Hunga-Hapai Volcano, Its Energy Release and Impact on Aerosol Concentrations and Tsunami
Authors/Creators
- 1. Obukhov Institute of Atmospheric Physics
- 2. Federal Research Center ''Unified Geophysical Service of RAS''
- 3. Physics Department, Lomonosov Moscow State University
- 4. Faculty of Science, University of Split
- 5. P.P. Shirshov Institute of Oceanology
Description
The characteristics of acoustic-gravity waves (waveforms, time durations, amplitudes, azimuths and horizontal
phase speeds) from the eruption of the Hunga-Tonga-Hunga-Hapai volcano detected at different infrasound stations of the Infrasound Monitoring System and at a network of low-frequency microbarographs in the Moscow region are studied. Using the correlation analysis of the signals at different locations, six arrivals of signals from the volcano, which made up to two revolutions around the Earth, were detected. The Lamb mode of acoustic gravity waves from the volcano eruption is identified and the effect of this mode on generation of tsunami waves and variation of aerosol concentration is studied. The energy released from an underwater volcano into the atmosphere is estimated from the parameters of the Lamb wave and compared with the energy released from the most powerful nuclear bomb of 58 Mt TNT.
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