Impulsive events at or near the Earth’s surface that involve mechanical oscillations of the ground, ocean, or atmosphere can induce upward-propagating atmospheric waves, leading to detectable disturbances in the upper atmosphere. Such impulsive events include, but are not limited to, earthquakes, tsunamis, volcanic eruptions, tropical cyclones, and man-made activities. The session solicits theoretical, observational, and modeling contributions to characterize and understand the atmospheric and ionospheric responses to the forcing from impulsive events. Studies on specific aspects of the lithosphere-atmosphere-ionosphere coupling process, for instance the excitation mechanisms of atmospheric acoustic-gravity waves, their dynamics, and the modulation of ionospheric plasma, are all welcome. The session also seeks novel techniques and algorithms to detect and identify the ionospheric disturbances driven by impulsive events, in particular investigations on differentiating ionospheric disturbances forced from below versus from above. Furthermore, the session welcomes original concepts to infer impulsive source properties from the corresponding upper atmospheric disturbances.

• NH - Natural Hazards
• S - Seismology