Dr. Atsuki Shinbori and colleagues at the Institute for Space-Earth Environmental Research (ISEE) at Nagoya University have published a paper in Earth, Planets, and Space (EPS) that uses data from the SuperDARN Hokkaido pair of radars to elucidate the physics of TIDs observed in TEC data following the 2022 Tonga volcanic eruption. It is shown that ionospheric effects reached the Japanese sector faster than atmospheric effects due to conjugacy. Here are links to press releases provided by the first author and coauthors including SuperDARN PI Dr. Nozomu Nishitani::
https://www.eurekalert.org/news-releases/958792
https://www.isee.nagoya-u.ac.jp/en/news/research-results/2022/20220714.html
The potential significance of this finding for advance warning of disturbance in the coupled atmosphere-ocean system was picked up by the United Nations Office for Disaster Risk Reduction (UNDRR) and reported here: https://www.preventionweb.net/news/shockwave-caused-tonga-underwater-eruption-may-help-scientists-predict-future-tsunami
Figure credit and citation: Shinbori, A., Otsuka, Y., Sori, T. et al. Electromagnetic conjugacy of ionospheric disturbances after the 2022 Hunga Tonga-Hunga Ha’apai volcanic eruption as seen in GNSS-TEC and SuperDARN Hokkaido pair of radars observations. Earth Planets Space 74, 106 (2022). https://doi.org/10.1186/s40623-022-01665-8