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Depth phases from local earthquakes

Created 17/10/2025

Updated 17/10/2025

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Synthetic seismogram modelling and observations suggest that depth phases from local crustal earthquakes are of the type sX , where X stands for Pg, Pn , and the reflections from the crust-mantle boundary , mainly PMP and SMS. Depth phases of the type pX generally have much smaller amplitudes and are unlikely to stand out in seismograms . The differential times sX-X provide a very good control of focal depth. Examples of earthquakes that occurred in May and June 1991 in an area northwest of Kempsey (New South Wales) and in September 1991 near St George (Queensland) indicate that their foci were in the uppermost crust, at depths of between 2 and 3 km

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Field Value
Title Depth phases from local earthquakes
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/fe8bbf33-06c8-4454-bbf3-fac759f734c6
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage Australia
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Depth phases from local earthquakes". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/depth-phases-from-local-earthquakes