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Continuous passive seismic data acquired with distributed acoustic sensors can be utilised to investigate both properties of the subsurface and the nature of the ambient seismic sources. Over the last two years (2021–2023), we acquired a significant volume of passive continuous DAS data using two downhole DAS installations in Harvey-3 well and NGL Curtin training well drilled onshore in Western Australia approximately 120 km one from another. In this presentation, we provide an in-depth spectral analysis of the ambient wavefield and discuss the composition, sources and properties of the elastic waves present on the record and their temporal and vertical spatial distribution. We also explore the relative performance of different cable installations by looking at the same seismic events acquired at both sites.