Fig. 6
From: Atmospheric resonances and their coupling to vibrations of the ground and waves in the ocean
Full-wave simulations of the oscillations in the thermosphere due to ground-level vibrations. Oscillations are generated by monochromatic vertical displacements of frequency f traveling with the subsonic velocity V along the lower boundary of the atmosphere. Color shows the amplitude of the vertical displacement at z = 180 km. The displacement amplitudes are normalized by their values at z = 0 and are dimensionless. The simulation assumes the same winter atmospheric conditions over Wallops Island (Virginia, USA) and propagation direction of the excitation as in Fig. 5a