2113 the maximum in-plane stress can be used to quantify the difference between the source mechanisms and the stress state. • Double-couple events not associated with a known structure and that are scattered spatially can be analysed in a similar way as with established techniques in this case (Gephart & Forsyth 1990; Hardebeck & Hauksson 2001). The smallest misfit between the shear traction and slip direction for both nodal planes is considered to quantify the difference between the mechanisms and the stress state.
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