cfc9e73e-8a50-4063-aa97-5ed3bce50faa urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-10-17T02:14:54 creation ISO 19115 2016 Spiral Arm Seismic Arrays cfc9e73e-8a50-4063-aa97-5ed3bce50faa Seismic arrays have many uses for signal enhancement, from surface wave characterisation of the near surface to teleseismic detection in the context of monitoring nuclear tests. Many variants of the geometrical configuration of stations have been used with the object of maximising potential resolution of the direction of arrival of incoming wavefronts. A versatile class of array configurations, with good resolution properties, can be constructed with multiple spiral arms. The array response is comparable to the samenumber of full circles but with far fewer stations, and robust to minor position changes in emplacement. The desirable properties of the spiral arm arrays are illustrated for a permanent array in the Precambrian Pilbara craton in northwestern Australia, and a temporary array on ancient sediments in southern Queensland, Australia. In each case the practical array response is very good and matches the theoretical expectations. The spiral arm configuration allows the deployment of relatively large aperture arrays with a limited number of stations, which is advantageous in a broad range of seismic applications including near-surface characterisation. Earth Sciences External Publication Published_External Link to Publication documentDigital Link to Publication HTML Unnamed resource documentDigital HTML