From 1 - 10 / 262
  • The paper presents the application of European Macroseismic Scale - 1998 (EMS-98) in assessing building vulnerability and to construct damage scenarios for the building stock in Padang (Indonesia) and Muzaffarabad (Pakistan). Typical building types in Indonesia and Pakistan are defined and compared to the standard construction types of the EMS-98. The inventory of 4,000 buildings in Padang was acquired from the 2009 Padang Region Damage Survey undertaken following the 30th September, 2009 West Sumatra Earthquake and supported by the Australia-Indonesia Facility for Disaster Reduction. During the survey, the building stock in Padang was classified into a schema consisting of 54 types and observed damages were categorised into 9 severities. An effort was made to map the building stock and observed damages from the survey outcomes to EMS-98 definitions to perform a scenario. The inventory of 750 buildings in Muzaffarabad was obtained from a field survey carried out after the 2005 Kashmir earthquake that struck the city and its hinterland, and subsequently updated in 2007 after conducting more surveys. The surveys documented the key building features so that the primary parameters affecting vulnerability and typical failure mechanisms could be identified. This study highlights the flexibility and robustness that EMS-98 offers for use outside of the European region and describes the limitations and possible improvements in the current version of the scale for global application. These include the addition of new building types (e.g., dhajji, brick veneer and mixed material construction), inclusion of a very high vulnerability class (A-), consideration of building vintage and storey class in vulnerability assignment and damage description for wooden structures. Treatment of subjectivity and uncertainty are the key areas requiring more attention in making improvements in EMS-98 and making it a global scale.

  • This video explains the concept behind Geoscience Australia's Data Cube, a new way of organising, analysing and managing the large amounts of data collected from Earth Observation Satellites (EOS) studies over time. The Data Cube facilitates efficient data analysis and enables users to interrogate Australia's EOS data from the past and present. It is hoped that the Data Cube will become a useful tool used by remote sensing scientists and data analysts to extract information to support for informing future decision-making and policy development within Australia.

  • Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This North_Perth_Gingin_Brook_Gravity_CSCBA267GU_Geodetic_p201360.nc grid is a complete spherical cap Bouguer anomaly grid for the North Perth Gingin Brook Gravity Survey, 2013 survey. This gravity survey was acquired under the project No. 201360 for the geological survey of WA. The grid has a cell size of 0.00363308 degrees (approximately 370m). A total of 1253 gravity stations were acquired to produce this grid.

  • Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This North_Perth_Gingin_Brook_Gravity_CSCBA230GUVD_Geodetic_p201360.nc grid is a first vertical derivative of the Bouguer anomaly grid for the North Perth Gingin Brook Gravity Survey, 2013 survey. This gravity survey was acquired under the project No. 201360 for the geological survey of WA. The grid has a cell size of 0.00363308 degrees (approximately 370m). A total of 1253 gravity stations were acquired to produce the original grid. A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid.

  • Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This Esperance_Gravity_CSCBA267GU.nc grid is a complete spherical cap Bouguer anomaly grid for the Esperance Gravity Survey 2013 survey. This gravity survey was acquired under the project No. 201361 for the geological survey of WA. The grid has a cell size of 0.00488666 degrees (approximately 500m). A total of 7894 gravity stations were acquired to produce this grid.

  • The NSW Continental Slopes survey GA-2413, SS10/2006 was acquired by Geoscience australia onboard the RV Southern Surveyor from the 12th of October to the 25th of October 2006. The geographical range stretched from Jervis bay in the South to Port Stephens in the North. The aim was to assess the physical nature of the NSW continental slope, improve our understanding of the surface and subsurface structure of the continental slope and to investigate the history of sediment movement along the continental slope.<p><p>This dataset is not to be used for navigational purposes.

  • The remote Eastern frontiers project aimed to provide a geological and petroleum prospectivity assessement of the Faust Capel Basins. Funded through Australian Governement Initiatives (Energy Security Program). The Faust Capel Basins survey GA-2436/ TAN0713 was acquired by Geoscience Australia onboard the RV Tangaroa (operated by NIWA) from the 6th of October to the 22nd of November 2007. The geographic range stretched from Wellington to the Faust Capel Basins to Lord Howe Island and back to Wellington. Approximately 8,945 sailing km of multibeam bathymetry was acquired. The high resolution bathymetry data imaged seafloor features in unprecedented detail, revealing the effects of recent magmatic activity and fluid migration on the seafloor. It also produced a new image of a flat topped unexplored seamount. A member of the Lord Howe Rise seamount chain.<p><p>This dataset is not to be used for navigational purposes.

  • The EM300 Sea Trials survey GA-2354, was acquired by Geoscience Australia after the installation of the new multibeam bathymetry acquisition system EM300 onboard the RV Southern Survey during the 16 to 18th of December 2003. The survey location was offshore Fremantle around the Perth Canyon. The aim of the survey was to test the bathymetry system installed on the vessel. The bathymetry grids consists of 10 and 40m resolution grids projected in Easting and Northing WGS84 UTM 50S.<p><p>This dataset is not to be used for navigational purposes.

  • The datasets measure the K490 parameter (Downwelling diffuse attenuation coefficient at 490 nm, a turbidity parameter) of Australian oceans. They are derived products from MODIS (aqua) images using NASA's SeaDAS image processing software. The extent of the datasets covers the entire Australian EEZ and surrounding waters (including the southern ocean). The spatial resolution of the datasets is 0.01 dd. The datasets contain 36 monthly k490 layers between 2009 and 2011. The unit of the datasets is 1/m.

  • The datasets measure the Total Suspended Materials (TSM) concentrations of ocean surface waters. They are derived products from MODIS (aqua) images using NASA's SeaDAS image processing software. The extent of the datasets covers the entire Australian EEZ and surrounding waters (including the southern ocean). The spatial resolution of the datasets is 0.01 dd. The datasets contain 36 monthly TSM layers between 2009 and 2011. The unit of the datasets is g/m3.