Detection and Characterisation of Seismic Tremor

Contact: A/Prof Paul Teal

GPS measurements of the locations of surveying monuments sometimes reveal episodes of accelerated motion, with durations of a few weeks. In some cases these episodes have occurred very regularly at intervals of months or years. In Japan and Canada, these movements have been linked with pronounced increases in seismic activity, notably a low-pitched rumble called ``seismic tremor''. In New Zealand, the accelerated motion has been observed, but seismic tremor has not. It may be that tremor is present, but that its characteristics make it difficult to detect using standard techniques.

This project involves the application of Blind Source Signal separation algorithms to seismic records which are likely to contain seismic tremor.