An image in the following polar cap patch paper was used as the cover for JGR-Space Physics V121 (9) publish in Sept 2016:
Zhang, Q. H., Zong, Q. G., Lockwood, M., Heelis, R. A., Hairston, M., Liang, J., et al. (2016). Earth’s ion upflow associated with polar cap patches: Global and in situ observations. Geophyical Research Letters, 43(5), 1845–1853. https://doi.org/10.1002/2016gl067897
