Earthquake monitoring

Geoscience Australia monitors, analyses and reports on earthquakes within Australia and internationally. This is done on a 24/7 basis by Duty Seismologists for the purposes of tsunami warning as part of the Australian Tsunami Warning System and to alert the Australian Government, State and Territory Governments and the general public of earthquakes in Australia and overseas.

Earthquakes that can be located in Australia are catalogued and published on the Geoscience Australia website. The analysis includes the origin time and date of the earthquake, its hypocentral location (latitude, longitude and depth) and its magnitude. For earthquakes over magnitude 3.5, this can be done by the Duty Seismologist within approximately 30 minutes of the earthquake's origin time. Smaller earthquakes that are not detected by many seismometers are difficult to locate in real-time and are thus computed by Seismic Analysts later.

Earthquakes outside Australia, but within our region, are published only for earthquakes with a magnitude of 5 or greater. Earthquakes occurring anywhere internationally with a magnitude of 6 or greater are also catalogued and published on the Geoscience Australia website.

As part of the Joint Australian Tsunami Warning Centre (JATWC), Geoscience Australia's Duty Seismologists have the responsibility to analyse and report on earthquakes that have the potential to generate a tsunami within 15 minutes of the origin time. An earthquake alert is then sent to Geoscience Australia's partner in the JATWC, the Australian Bureau of Meteorology, to determine tsunami advice and publish tsunami bulletins. The earthquake information is also catalogued and published on the Geoscience Australia website.

Link to why we monitor earthquakesWhy we monitor earthquakes?

In the May 2005 Budget, the Australian Government allocated $68.9 million over four years [more]

Link to how we monitor earthquakesHow we monitor earthquakes?

Geoscience Australia monitors seismic data from over 100 stations on the Australian [more]