Main, I.G., Meredith, P.G., Henderson, J.R. and Sammonds, P.R. 1994. Positive and negative feedback in the earthquake cycIe: the role of pore fluids on states of criticality in the crust. Annals of Geophysics. 37, 6 (Nov. 1994). DOI:https://doi.org/10.4401/ag-4148.