The accurate locations of seismometers are stored in a database accessible by an earthquake monitoring computer system.
The system also has access to crustal velocity models which provide approximate information on how fast the various earthquake waves travel through the different layers which make up the Earth in the area between the earthquake and the seismometers.
The times at which the differing seismic waves arrive at various seismometers are identified by Seismic Analysts or by a computer system.
The arrival times of the seismic waves at the seismometers, together with the locations of the seismometers and the speed at which the seismic waves travel to the seismometers are all used to determine the location of the earthquake.
More information about these historical events can be viewed through the earthquake storymap. This causes the build up of mainly compressive stress in the interior of the Indo-Australian plate which is released during earthquakes.
Geoscience Australia monitors, analyses and reports on significant earthquakes to alert the Australian Government, State and Territory Governments and the public about earthquakes in Australia and overseas.
which means to shake or move violently and was later applied to the science and equipment associated with earthquakes.
A magnitude 8.6 earthquake releases energy equivalent to about 10 000 atomic bombs of the type developed in World War II.
Fortunately, smaller earthquakes occur much more frequently than large ones and most cause little or no damage.
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. They are most common at tectonic plate boundaries where different plates meet.