Seismic Efficiency
Seismic Efficiency : For an earthquake, the ratio of the energy radiated in the seismic waves to the total energy released due to fault slip, or, equivalently, the ratio of apparent stress to the average stress acting on the fault to cause slip. Savage and Wood (1971) suggested that the seismic efficiency of earthquakes should not exceed 0.15 and a likely value would be about 0.07. The seismic efficiency is less than the radiation efficiency, because the latter neglects energy loss due to frictional heat and conversion of strain energy into acoustic energy. See Eq. (6.5) in Ben-Zion (2003); also Kanamori and Brodsky (2002) and Bormann and Di Giacomo (2010). See radiation efficiency
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