Fig. 6
From: Volcanic crystals as time capsules of eruption history
Recharge to eruption clinopyroxene timescales compared to pre-eruptive seismic events for the 1974 eccentric eruption. The horizontal axis represents calendar days in January 1974. Major seismic events preceding the onset of eruption23,45 are marked with vertical lines. Average growth times of clinopyroxene rims and outermost rims for this eruption (Fig. 5) are represented by horizontal rectangles. The 1974 eruption is related to one of the greatest seismic crises ever registered on Mt. Etna. We interpret that seismicity started due to magma intrusion, recorded by the crystallisation of Cr-rich rims. Magma mobilisation fits the timing of the deepest earthquake, and ascent to the surface is recorded by Cr-poor outermost rims
