Natural Hazards Coffee: Modeling of upper atmospheric responses to earthquakes and tsunamis

Zoom Meeting: https://us02web.zoom.us/j/87676070556 ID: 876 7607 0556 Abstract: Systematic observations of atmospheric and ionospheric dynamics have been made since 1960s, but only in the last decades have resolution of data become sufficient to detect and investigate small-scale and short-time period processes, such as acoustic and gravity waves (AGWs) generated by natural hazards (NHs). In addition, modern computational capabilities allow testing and validating theoretical and observational studies through direct numerical simulations, which are especially important for highly nonlinear dynamics. We report our recent results of case and parametric studies of earthquake/tsunami-atmosphere-ionosphere coupling processes. Incorporating realistic dynamics driven by earthquakes and tsunamis to nonlinear compressible neutral atmosphere and ionosphere models, we study the whole chain of triggering processes, from Earth’s interior to upper thermosphere. The results suggest that modern ground- and space-based observations of NH-driven perturbations in upper atmosphere may markedly improve our understanding of these coupled geophysical processes. They are useful for the characterization of NH sources (for example, to constrain the kinematics of the earthquakes) and may supplement tsunami early-warning systems.