Residents in parts of WA's Great Southern have reported feeling an earthquake overnight, which seismologists say is an aftershock following a larger tremor last month.
The magnitude-4.7 earthquake near Lake Muir, north of Walpole, was recorded soon after midnight and was felt more than 100 kilometres away.
There have been no reports of damage, but residents reported feeling swaying as far afield as Denmark and Albany.
The quake was recorded at a depth of 5 kilometres.
The tremor follows a magnitude-5.7 quake in the region a month ago, which caused minor damage.
Seismologists anticipated latest tremor
Geoscience Australia senior seismologist Jonathan Bathgate said the significant aftershock was not a surprise, as the region had seen a substantial number of tremors since the main quake.
"We've had more than 400 earthquakes there since the magnitude-5.7," Mr Bathgate said.
"We were really waiting for something a little bit larger, like this 4.7.
"We have had a number of reports of people who have felt this earthquake … people reporting pictures rattling on the walls and things like that."
Mr Bathgate said it was possible another significant aftershock could be felt, with small tremors continuing.
"Generally what happens is the earthquakes do decrease in size and frequency over time, but we certainly cannot rule out another earthquake of this size or larger in this sequence," he said.
