An image from the paper on x-line associated with the Tonga eruption is on JGR-Space Physics Cover (vol 127, 6, June 2022):
Aa, E., Zhang, S.-R., Wang, W., Erickson, P. J., Qian, L., Eastes, R., et al. (2022). Pronounced Suppression and X-Pattern Merging of Equatorial Ionization Anomalies After the 2022 Tonga Volcano Eruption. Journal of Geophysical Research: Space Physics, 127(6), e2022JA030527. https://doi.org/10.1029/2022ja030527
