The observed 0.3 MHz increase in f o E corresponds to a ~30% rise in plasma density—significant enough to impact HF radio propagation. Existing empirical models (e.g., IRI-2020) do not account for such infrasound-driven variability.
HEAR05: Characterizing Infrasound and ULF Wave Propagation in the Upper Atmosphere Using Ground-Based Magnetometer and Microbarometer Arrays hear05
(Paper prepared for submission to Journal of Geophysical Research – Space Physics, June 2026) The observed 0
A. N. Volkov, L. M. Chen, R. J. Patterson Affiliation: Institute for Atmospheric and Space Physics, University of Colorado Boulder June 2026) A. N. Volkov