Southern Alps Passive Seismic Experiment

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Anderson, H.J.; Eberhart-Phillips, D.; McEvilly, T.; Uhrhammer, R.; Wu, F.T. 1997 Southern Alps Passive Seismic Experiment. Lower Hutt: Institute of Geological & Nuclear Sciences. Institute of Geological & Nuclear Sciences science report 97/21 20 p.

Abstract: The Southern Alps Passive Seismic Experiment (SAPSE) was conceived at a 1993 workshop to discuss plans for a four year cooperative geophysical study of the Pacific-Australian plate boundary in the South Island, New Zealand. The SAPSE experiment was designed to concentrate high quality data acquisition in the central South Island where the active source experiments were planned. The experiment was designed to provide data necessary to obtain the following information: precise hypocentre locations and source mechanism estimates for the many small microearthquakes to improve the definition of the character of seismicity and state of stress along the Alpine Fault; three-dimensional P- and S-wave crustal velocity structures; crustal thickness and configuration of a possible root beneath the Southern Alps; surface wave tomography at 20-50 km resolution; velocity distribution and anisotropy structure of the lowermost crust and upper mantle; regional scale lithospheric anomalies. (auth/EB)