PerthNow | Earthquake shakes WA's South, strong tremor felt in Denmark, Albany PerthNow A TREMOR near Lake Muir in WA's South overnight was the biggest of more than 400 aftershocks after last month's earthquake near Kojonup. The magnitude 4.7 quake hit just after 12.30am on Saturday, at a depth of just 5km. The epicentre was near Lake ... Magnitude-4.7 earthquake rocks area surrounding Lake Muir in WA's Great Southern 'Mummy something just wriggled my house!' Earthquake hits WA overnight Western Australia rocked by 4.7-magnitude earthquake |