This web service delivers metadata for onshore active and passive seismic surveys conducted across the Australian continent by Geoscience Australia and its collaborative partners. For active seismic this metadata includes survey header data, line location and positional information, and the energy source type and parameters used to acquire the seismic line data. For passive seismic this metadata includes information about station name and location, start and end dates, operators and instruments. The metadata are maintained in Geoscience Australia's onshore active seismic and passive seismic database, which is being added to as new surveys are undertaken. Links to datasets, reports and other publications for the seismic surveys are provided in the metadata.

Legacy product - no abstract available

Introduction National baseline geochemical surveys have been conducted in most developed countries, but not yet in Australia. In a country as large and diverse as Australia, an initial step in the development of a national low-density geochemical atlas needs to be the pilot testing of geochemical survey methodologies in representative regions displaying contrasting topographic, drainage and climatic conditions. To date, we have conducted or are conducting-pilot geochemical surveys in four regions of south-eastern Australia: the Riverina, Curnamona, Gawler and Thomson regions (Figure 1). The main focus of the surveys is to sample fine-grained transported regolith (sediments). In all but the Curnamona cases, the sampling strategy adopted consisted of collecting sediment samples at two depths from floodplains near the outlet of (mostly large) large catchments. In the Curnamona, only surface fine-grained soil was collected mostly from depositional plains (Caritat & Reimann 2003). Other sampling media are also being tried in these surveys, including groundwater, plant tissues, and lag. Various sampling densities are being tested (Table 1), and modelling is planned to test what minimum sampling density would be required for a national coverage. The most recent survey, which is still in a preliminary stage, is in the Thomson region, for which only reconnaissance sampling has taken place so far. The most advanced pilot project is the one from the Riverina region, the subject of the remainder of this article. Table 1. Overview of sizes and sampling densities of pilot geochemical surveys. Pilot survey Distance east-west (km) Distance north-south (km) Approximate area (km2) Number of sampling sites Average sampling density (1 sample per X km2) Riverina 288 427 122,976 142 866 Curnamona 305 203 61,915 199 311 Gawler 212 253 53,636 48 1117 Thomson 664 316 209,824 19 (preliminary) ~200 (target) 11,043 (preliminary) 1049 (target)

This is a report describing a quantitative landslide risk assessment carried out in the Cairns area as part of the AGSO Cities Project. The study objective is to provide information on landslide types, conmunity vulnerability and risks to the Cairns City Council for planning and emergency management purposes. Using geological and geomorphological observations and historical information, a regional map of landslide hazards in the Cairns area has been produced. This map was entered into a geographic information system (GIS) containing comprehensive information on buildings, roads and demography.

The Sydney Basin encloses a significant proportion of the Australian population, and the 1989 M5.6 Newcastle earthquake demonstrated that the basin is not immune from the impact of even relatively modest earthquakes. In spite of this, few investigations have been conducted to identify and characterise potential geologic sources of strong ground shaking. A recent major study of the southern part of the basin commented that - The available data are less complete than ideal for the purposes of probabilistic seismic hazard analysis. - Essentially, the extreme infrequency of large earthquake events in intraplate regions, such as Australia, means that the short historic record of seismicity is poorly suited to the task of assessing seismic hazard. Hence, geologic, geomorphic and paleoseismic knowledge has a vital role to play in obtaining constraint on the probable location and recurrence of large and damaging earthquakes near Sydney. In April 2005 a one day workshop at the University of Sydney brought together a diverse range of researchers with experience in the geology and geomorphology of the Sydney Basin, neotectonics and seismic hazard science. A series of seminars were presented covering geology, geomorphology, seismicity and seismic hazard. These served as a nucleation point for subsequent discussion, and the drafting of the papers presented herein. This proceedings volume contains within its covers tools for understanding large earthquake occurrence within the Sydney Basin and compiles 12 papers addressing landscape and structural developement, and seismic hazard aspects, of the Lapstone Structural Complex west of Sydney. Hence, it represents a framework upon which future advances in our understanding of the seismic hazard posed to Australia's largest population centre may be based.

No abstract available

The 1:250 000 maps show the type and distribution of 51 regolith-landform units with unique dominant regolith-landform associations, and are a subset of the 205 mapping units on the six 1:100 000 maps. These units are distinct patterns of recurring landform elements with characteristic regolith associations. Geomorphic symbols indicate the location and type of geomorphic activity. The maps present a systematic analysis and interpretation of 1:89 000 scale 1973 RC9 aerial photography, 1:100 000 scale topographic maps (AUSLIG), and field mapping data. High resolution (250m line spacing) airborne gamma-ray spectrometry and magnetics (Geoterrex) were used where applicable

A geotechnical landscape map of Australia has been drawn depicting regions of constant [geological and physical] (NOT geophysical {Ed}) properties for road construction. The map, drawn at a scale of 1:2 500 000 for clarity, has a true accuracy of a 1:5 000 000 scale map, and is based on the four variables - landform, underlying lithology, soil type and [surficial] lithology - which are the principal [geological and physical] determinants for road construction. The origins and interpretation of the source maps together with a description of the legend of the geotechnical landscape map are described in this Report. Precis {Ed}: A map delineating regions with differing geotechical properties with particular application to road construction.

The Balaclava 1:25,000 regolith-landform map illustrates the distribution of regolith materials and the landforms on which they occur, described using the RTMAP scheme developed by Geoscience Australia

The Bathurst 1:250,000 landform map illustrates the distribution of landforms described using the RTMAP scheme developed by Geoscience Australia