Authors / CoAuthors
Allen, T.
Abstract
Geoscience Australia, together with contributors from the wider Australian seismology community, has produced a National Seismic Hazard Assessment (NSHA18) that is intended as an update to Geoscience Australia’s 2012 National Seismic Hazard Maps (NSHM12; Burbidge, 2012) and its 2013 update (Leonard et al., 2013). The update at this time is intended to take advantage of recent developments in earthquake hazard research and to ensure the hazard model uses evidence-based science. This Geoscience Australia Record provides an overview of the output datasets generated through the development of the NSHA18. Time-independent, mean seismic design values are calculated on Standards Australia’s AS1170.4 Soil Class Be for the horizontal peak ground acceleration (PGA) and for the geometric mean of the spectral accelerations, Sa(T), for T = 0.1, 0.2, 0.3, 0.5, 1.0, 2.0 and 4.0 s over a 15-km national grid spacing. Hazard curves and uniform hazard spectra are also calculated for key localities at the10% and 2% probability of exceedance in 50-year hazard levels. Uniform-probability seismic hazard maps of PGA, in addition to all spectral periods, are provided for 10% and 2% probability of exceedance in 50 years. A Python script is provided to enable end users to interpolate hazard curve grids and to export site-specific hazard information given an input location and probability of exceedance (in the case of uniform hazard spectra). Additionally, geographic information system (GIS) datasets are provided to enable end users to view and interrogate the NSHA18 outputs on a spatially enabled platform. This is the most complete data publication for any previous Australian National Seismic Hazard Assessment. It is intended to ensure the NSHA18 outputs are openly available, discoverable and accessible to enable end-users to integrate these data into their own applications.
Product Type
document
eCat Id
123028
Contact for the resource
Point of contact
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Digital Object Identifier
Keywords
- ( Discipline )
-
- earthquake hazard
-
- Published_External
-
- HVC_144647
Publication Date
2018-11-05T08:29:52
Creation Date
2018-09-18T00:00:00
Security Constraints
Legal Constraints
Status
final
Purpose
This Record is the seventh in the series of Records and datasets that support the release of the NSHA18 (overarching overview provided at ecat 123020). The data package is available via eCat 123050.
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Record 2018/033
Lineage
This Record is the seventh in the series of Records and datasets that support the release of the NSHA18 (overarching overview provided at ecat 123020). The data package is available via eCat 123050. Promotion of project via http://www.ga.gov.au/about/projects/safety/nsha
Parent Information
Extents
[-44, -9, 112, 154]
Reference System
Spatial Resolution
Service Information
Associations
Downloads and Links
Source Information