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.

For every unit increase in magnitude, there is roughly a thirty-fold increase in the energy released.

For instance, a magnitude 6.0 earthquake releases approximately 30 times more energy than a magnitude 5.0 earthquake, while a magnitude 7.0 earthquake releases approximately 900 times (30x30) more energy than a magnitude 5.0.

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.

Former Wales manager Mark Hughes said: ā€˜Iā€™m devastated.

He was a privilege to work alongside and call a friend.

Earthquakes are the vibrations caused by rocks breaking under stress.

The underground surface along which the rock breaks and moves is called a fault plane.

Police stand outside Warrington Coroner's Office during the opening of the inquest into the death of former footballer Gary Speed.

The Wales manager was found hanged at his home by his wife, the inquest was told Asked by Cheshire Coroner Nicholas Rheinberg whether there were any suspicious circumstances, he replied: 'Given my assessment at the scene and information which I have to date, I am not investigating this as a suspicious incident.'The coroner told the packed hearing: 'I am aware that there is great Press interest in this case and I would ask that the Press do respect the privacy of the family at what is obviously a very difficult time for them.'Shocked fans of the clubs Speed represented over his long career ā€“ including Leeds United, Everton, Newcastle and Bolton Wanderers ā€“ left photographs, shirts and bouquets of flowers outside their grounds.

This location is also known as its focus or hypocentre which is represented by the latitude, longitude and depth below the surface.