WA Array Site Characterisation - Enhanced Shear Wave Velocity Profiling from Passive Seismic Data

The WA Array project, launched in late 2022 by the Government of Western Australia, is a seismic imaging initiative deploying 165 seismometers at 40 km intervals. Over ten years, it will cover the state of Western Australia (over 2.5 million square kilometres), focusing on mapping crustal and lithospheric structures and aiding mineral exploration, energy studies, seismic risk assessments, and green energy planning. One of the anticipated products from the project include a local site characterisation including a site-specific near surface shear wave velocity profile, the time-averaged shear-wave velocity in the top 30 meters of the ground, VS30, and bedrock depth determinations, all of which are essential for characterizing local site conditions.