Empirical relationship of T-wave energy and fault parameters of northeast Pacific Ocean earthquakes

h total of 179 northeast Pacific Ocean earthquakes that occurred between 19 92-1998 are used to investigate the relationship of T-wave acoustic energy and earthquake fault parameters. The moderate-sized (3.7 less than or equal to M-w less than or equal to 6.9) earthquakes were recorded by ocean hydro phones and had their source parameters estimated by land-based seismic netw orks. The acoustic energy release at the seafloor-water interface of each e arthquake was estimated by removing the signal attenuation along the propag ation path and instrument gain from the hydrophone signal. There appears to be a relationship where, for a given magnitude earthquake, T-wave energy i s lower for normal and reverse fault earthquakes than strike-slip events. A more detailed comparison indicates acoustic energy of the earthquake will often decrease as the component of dip-slip motion increases. These observa tions suggest fault parameter information is contained within the T-wave si gnal packet.