Wang, T., Dai, L., Escoubet, C. P., Gonzalez, W., Ren, Y., Zhu, M., Wang, S., Wang, C., Wang, X., Wang, K., Liu, J. (2026). Substorm expansion embedded in a global cycle of field-aligned currents and auroral electrojets. Nature Communications. https://doi.org/10.1038/s41467-026-69753-x