Fig. 4
From: Wavelet-based verification of a relative paleointensity record from the North Pacific
a Plot of hysteresis ratios (Day plot; Day et al. 1977) and b representative examples of first-order reversal curve (FORC) diagrams. In the Day plot, the single-domain (SD), multi-domain (MD), and superparamagnetic (SP) mixing curves of Dunlop (2002) are shown in gray. Bcr, remanent coercivity; Bc, coercive force; Mr, saturation remanent magnetization; Ms, saturation magnetization. FORC diagrams are plotted as Bc versus interaction field (Bu)