@Article{egusphere-2026-1716,
AUTHOR = {Malone, R.},
TITLE = {Critical Slowing Down in the Geomagnetic Ap Index as an Early Warning Signal for Major Geomagnetic Storms},
JOURNAL = {EGUsphere},
VOLUME = {2026},
YEAR = {2026},
PAGES = {1--13},
URL = {https://egusphere.copernicus.org/preprints/2026/egusphere-2026-1716/},
DOI = {10.5194/egusphere-2026-1716}
}