Earthquake recordings in Australia are a crucial input to a wide range of applications in seismology and earthquake engineering. In particular, earthquake recordings are critical for robust estimation of earthquake magnitudes, earthquake hazard assessment, and dynamic structural analysis. The expansion of permanent monitoring networks (e.g., Australian National Seismograph Network) and deployment of temporary seismic networks in Australia over the past few decades has resulted in a significant increase in the number of earthquake ground motion recordings, particularly for moderate magnitude events. The volume of new data means there is now a need to store these recorded data and metadata in standard format in a comprehensive, searchable, national ground motion database. Recently, we developed a ground-motion database for earthquakes in cratonic regions of western and central Australia, as well as non-cratonic southeastern Australia. We also developed an associated graphical user interface tool to process and visualise the ground-motion data. This tool can also store the processed waveforms in the database. Work is ongoing at Geoscience Australia to develop a web delivery portal to provide end-users direct access to Australian ground-motion data. This web-based portal would enable end-users to search the ground-motion database based on key earthquake, station, and waveform parameters in a user-friendly platform. Providing public access to these data will facilitate greater use of ground-motion recordings to inform various applications including seismic hazard assessment and dynamic structural analysis. Presented at the 2023 Australian Earthquake Engineering Society (AEES) Conference

A database of recordings from moderate-to-large magnitude earthquakes is compiled for earthquakes in western and central Australia. Data are mainly recorded by Australian National Seismograph Network (ANSN), complemented with data from temporary deployments, and covering the period of 1990 to 2019. The dataset currently contains 1497 earthquake recordings from 164 earthquakes with magnitudes from MW 2.5 to 6.1, and hypocentral distances up to 1500 km. The time-series data are consistently processed to correct for the instrument response and to reduce the effect of background noise. A range of ground-motion parameters in the time and frequency domains are calculated and stored in the database. Numerous near-source recordings exceed peak accelerations of 0.10 g and range up to 0.66 g, while the maximum peak velocity of the dataset exceeds 27 cm/s. In addition to its utility for engineering design, the dataset compiled herein will improve characterisation of ground-motion attenuation in the region and will provide an excellent supplement to ground-motion datasets collected in analogue seismotectonic regions worldwide. This paper was presented at the Australian Earthquake Engineering Society 2021 Virtual Conference, Nov 25 – 26.