https://angeo.copernicus.org/articles/28/479/2010/angeo-28-479-2010.html
ANGEO - Severe geomagnetic storms and Forbush decreases: interplanetary relationships reexamined
Abstract. Severe storms (Dst) and Forbush decreases (FD) during cycle 23 showed that maximum negative Dst magnitudes usually occurred almost simultaneously...
geomagnetic stormsforbush decreasesangeosevereinterplanetary