Conveners
O1.4 Multidisciplinary Studies of the Earth’s Subsystems
- Pierrick Mialle (CTBTO Preparatory Commission)
- Dmitry Storchak (International Seismological Centre (ISC))
Meteoroids larger than about 10 cm in diameter produce shockwaves upon entering dense regions of the Earth’s atmosphere, where the local Knudsen number corresponds to the continuum flow regime. Shockwaves generated by the hypersonic flight and fragmentation of meteoroids decay to low frequency sound (infrasound). Given desirable propagation conditions and sensor availability, meteoroid...
The 15 January 2022 Hunga, Tonga, volcano's explosive eruption produced the most powerful blast recorded in the last century, with an estimated equivalent TNT yield of 100–200 megatons. The blast energy was propagated through the atmosphere as various wave types. The most prominent atmospheric wave was a long period (>2000 s) surface guided Lamb wave with energy comparable to that of the 1883...
The explosive eruption of the Hunga Volcano on 15 January 2022 provided an ideal test case for reviewing established methods to analyse source processes, especially because the key task of discriminating different kinds of explosive sources such as a nuclear test and a volcano eruption can be challenging. Standard techniques were applied to analyse critical events in the frame of the CTBT,...
A propagation model for atmospheric pressure signal generated by the eruption of the Hunga-Tonga-Hunga-Haʻapai volcano (hereafter abbreviated as Tonga) is proposed. The model is used to explain the changes in the wave form of the observed signal with increasing distance from the volcano. The model is based on the solution of the linearized Korteweg de Vries (KDV) equation, which describes the...
