This file includes the normalised demagnetisation curves of anhysteretic remanent magnetisation (ARM) measurements from the Foulden Maar sediment core FH2. The measurements are averaged across 10 cm of sediment (~10 measurements) in order to reduce noise. The columns are as follows: Column 1: alternating field applied (millitesla, mT). Columns 2-49: Each column represents one averaged demagnetisation curve. The data are normalised, so there are no units (original measurements were in A/m).