Detected average expansion of the ME from Head et al. (2024) vs the detected PAF count for each northern HST-STIS series considered in this work. Negative expansions imply a contracted ME. Green crosses denote those cases with a compressed magnetosphere, and red pluses those cases with an uncompressed magnetosphere (Yao et al. 2022); grey points denote cases where the compression state of the magnetosphere is unknown.