Final calculations of epicentres are usually completed about 40 to 60 days behind true time. Any more recent events listed are preliminary and both the location and magnitude are likely to change. Some events outside SA may be listed. These are events which can be seen, and possibly located with the SA seismograph network. These epicentres and magnitudes are likely to be much less accurate, and are almost certain to change when all data are included. Accuracy of epicentres is highly variable depending on which stations are used, and on the size of the earthquake.
Other networks, particularly Geoscience Australia and Environmental Systems and Services often supply waveforms and data for the calculations of these epicentres and magnitudes.
The Date and Time are both UTC (Coordinated Universal Time) which is 9:30 behind SA time or 10:30 behind in daylight saving time. This means early morning (SA time) earthquakes will be listed as the day before.
Depth is not listed. It is usually the most difficult parameter to calculate, and is often inaccurate, particularly in preliminary solutions.
Magnitude is usually a Richter magnitude, calculated from the peak amplitude of Seismic (S) waves, but may occasionally be different.
The Place name is only a rough guide for ease of use, and some names may not be recognised by many users. Users may prefer to copy the latitude and longitude to a map program for a better description.