Providing tropical cyclone best track data in a centralized location to aid our understanding of the distribution, frequency, and intensity of tropical cyclones worldwide.

Geodetic Calculations - Vincenty's Formulae, Inverse Method Given latitude and longitude of two points, calculate the ellipsoidal distance and forward and reverse azimuths between the points.

Geodetic Calculations - Vincenty's Formulae, Direct Method Given the latitude and longitude of a point (1) and the forward geodetic azimuth (1-2) and ellipsoidal distance to a second point (2), calculate the latitude and longitude of the second point and the reverse azimuth (2-1).

Natural hazards have an impact on every Australian State and Territory. These hazards include bushfires, cyclones, earthquakes, floods, landslides, severe weather, tsunami and volcanoes. These phenomena threaten lives and damage private and public assets, as well as disrupt water, power, transport and communication services. These hazards and their associated impacts also can seriously affect employment, public administration and incomes to industry, agriculture and commerce.

AUSGeoid98 is the current model in a series of national geoid models for Australia produced by Geoscience Australia. It replaced AUSGeoid93 and uses the latest available data and techniques.

The Gippsland Basin is a premier hydrocarbon producing province, however exploration efforts in recent years were only met with limited success. New discoveries and extensions to existing ones were recorded along the northern basin flank, while the entire eastern, deeper water part of the basin remains underexplored to the present day. In order to address these questions Geoscience Australia has embarked on a petroleum systems modelling study to better understand the burial history of key horizons in the Gippsland Basin and its influence on changes in temperature, porosity, permeability and fluid migration. APPEA Conference 2014

Using data from the six Australian continental magnetic observatories, a contour display of the rate-of-change of magnetic total intensity, F, over the continent is shown below. This provides a broad view of how F changes across Australia. The units shown on the contours are in nanoTesla per hour. The grey squares indicate the locations of the magnetic observatories. Both real-time and historic data can be displayed in this format. All maps are generated from a period of 15 minutes of observatory data and available at 15 minute intervals.

If you felt an earthquake, or know of an earthquake that occurred recently, please fill in this form. Even if you did not feel the earthquake yourself, please fill in the form, as this information will assist us.

Database to provide descriptions and images of the Australian Fundamental Gravity Network (AFGN) stations to Gravity Surveyors and the general public. The Australian National Gravity Database (ANGD) is underpinned by the AFGN, which provides the datum for gravity surveys conducted throughout Australia. The AFGN is a network of permanently marked and documented gravity base stations which allow gravity surveys to tie their surveys to a consistent datum. Geoscience Australia maintains the Network with assistance in the form of updates from State and Territory Geological Surveys, Surveyors, and the general public. Geoscience Australia maintains the ANGD, which contains data from gravity surveys conducted throughout Australia and its Remote Offshore Territories. These data have been sourced from within Geoscience Australia, State and Territory governments and agencies, mineral and petroleum exploration companies, universities and overseas organisations.

Computes sunrise, sunset and twilight times using the National Gazetteer of Australia.