Break ins, possums, even a plane crash was discussed on the Leader facebook page as residents tried to figure out what last night's earth tremors were.

In fact earthquakes are more common than you might think. On the Geoscience Australia website, facts state that there are on average 200 earthquakes of magnitude 3.0 or more in Australia each year.

Earthquakes above magnitude 5.5, such as the 5.6 magnitude event in Newcastle in 1989, occur on average every two years. About every five years there is a potentially disastrous earthquake of magnitude 6.0 or more.

Our friends in Adelaide have the highest earthquake hazard of any Australian capital. It has experienced more medium-sized earthquakes in the past 50 years than any capital because South Australia is being slowly squeezed sideways by about 0.1mm/yr.

Australia's largest recorded earthquake was in 1941 at Meeberrie in Western Australia with an estimated magnitude of 7.2 but it occurred in a remote, largely unpopulated area. A magnitude 6.8 earthquake at Meckering in 1968 caused extensive damage to buildings and was felt over most of southern Western Australia. Earthquakes of magnitude 4.0 or more are relatively common in Western Australia with one occurring approximately every five years in the Meckering region.

Here's what you said:

None

Tara Jane Fitzsimmons:

Sandra Croaker:

Kim Walsh:

Carmel Abbott:

Raelene Patterson:

Karen Urquhart:

Holly Douglas:

@gavinflan:

@withmyeyesopen:

@Kristy_Hunt:

@janiekibble:

@Inverell:

@Sharn:

@Hahnsmum:

@Inverell:

@scarry moment:

@Peta:

@Duchess:

Not looking forward to feeling another tremor!