Histroric earthquakes map courtesy USGS

Earthquake overview : A strong shallow earthquake occurred in the coastal waters of western Australia. The quake occurred in the middle of the Australian night approx. 50 km from Exmouth and the Cape Range National Park.

Update :  The greater epicenter area had some similar earthquakes since 1990, most of them to the North West and all of the earthquakes at a depth less than 35 km.

Update :  The Muiron Islands Nature reserveis located within the potential (light) damageradius given by Geoscience Australia

Update :  All data below is from Geoscience Australia

Update : Locations where the earthquake might have been felt : Lyndon, Exmouth, Cape Range National Park, Dampier, Onslow and Yannarie

Update :  Geoscience Australia expects this earthquake to be felt in a radius of 252 km

Most important Earthquake Data:
Magnitude : Mw 5.4
Local time at epicenter : Tuesday, December 06, 2011 at 04:10:03 AM at epicenter

Depth (Hypocenter) : 15 km
Geo-location(s) :
Approx. 20 km from the Muiron Islands Nature Reserve
50 km from the North West Cape

for updates and more, go to:  http://earthquake-report.com/2011/12/05/strong-earthquake-near-the-coast-of-western-australia-cape-range-national-park/