Forecaster summary - Issued 2025-05-28T00:29:44

Current electron flux is varying between moderate and background levels and likely to remain similar at first. Charging of the Van Allen belts is expected through much of the period due to the influence of CH51/- and later CH52/-. Significantly increased levels of electron flux at GEO is not forecast until day 3 (30 May) when the Van Allen belts relax back out, with diurnally and probably later, persistently High levels expected.

Associated electron fluence is currently below the Active (1e8 integrated pfu) threshold and declining. This is expected to continue until day 3 (29 May) when a more significant rise is forecast. Based on persistence forecasting (from MOSWOC REFM) Active levels of fluence are possible late on day 3 (29 May) and then expected on day 4 (30 May).