This paper derives source scaling relations between rupture dimensions and moment magnitude for subduction-zone earthquakes, separating between interface events occurring at the contact of the subducting and overriding tectonic plates, and intraslab events, which occur within the subducting slab. These relations are then compared with existing scaling relations, which are predominantly based on data from crustal events.

Relations between the dimensions of the rupture zone of earthquakes and the amount of energy released as measured by the seismic moment, M0, or equivalently moment magnitude, Mw, (Hanks and Kanamori 1979), are of great practical use...

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