Embedded Regions 1 and 2 Field-Aligned Currents: Newly Recognized From Low-Altitude Spacecraft Observations. - Jiang Liu; Lyons, L. R.; Chih-Ping Wang; Yuzhang Ma; Strangeway, R. J.; Yongliang Zhang; Kivelson, M.; Ying Zou; Khurana, K. (Journal of Geophysical Research. Space Physics, 2021)