Latest uploaded research paper:
A review of seismicity in the southwest region of Western Australia July 2021–June 2022 with special reference to event clustering. (authors Vic Dent and Clive Collins)
Abstract:
Previous reports on southwest Western Australia (SWA) seismicity have identified 80 cluster locations, mostly from activity in the last 10 years. Earthquakes in the region in 2021–22 are reviewed here and allocated to cluster locations where considered appropriate. Most of the seismicity can be assigned to one of 18 cluster locations considered active during the year. The most significant seismicity for the year was southwest of Arthur River, from January 2022 onwards. This was one of the more significant seismic episodes in SWA for the last 50 years and is identified as a new cluster location. All but three of the cluster locations identified in this year were identified in previous studies. A four-tier rating system for clusters is introduced here, and the Arthur River cluster is rated “A”. Characterising the clustered nature of SWA seismicity is important to help us to understand the underlying geological causes of this behaviour, and to better inform the assessment of local earthquake hazard.
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