Fluid models of atmospheric disturbances generated by strong seismic events

Strong seismic events are able to generate atmospheric waves which can propagate in the atmosphere up to the ionosphere and magnetosphere, producing fluctuations of the ionospheric plasma density, as well as variations of the resonance frequency of magnetospheric field lines. The interest in these physical phenomena has significantly increased during the last years, especially thanks to the rapid progresses in the observations of co-seismic signals in the atmosphere, ionosphere, and magnetosphere, made possible by the growing availability of high quality measurements and data provided by Earth and space instruments, and also by reanalysis datasets. In this contribution, we discuss the generation and propagation in the atmosphere of perturbations due to strong seismic events. To this aim, different fluid models are used, in which earthquakes can be described through suitable time profiles which include the main features of real seismic signals. The excitation and vertical propagation of non vanishing modes is investigated for different configuration of the models.

This study was carried out within the “Space It Up” project funded by the Italian Space Agency, ASI, and the Ministry of University and Research, MUR, under contract n. 2024-5-E.0 - CUP n. I53D24000060005.