More quakes possible
The Lower South West could possibly expect at least one more earthquake of similar size to the 5.7 and 5.4 magnitude Lake Muir quakes that rocked the region in September and November.
This information came following a community information session in Frankland River on November 28.
The session featured a visit from Geoscience Australia’s Trevor Allen, who spoke about what caused the earthquakes, what steps had been taken following the quakes and the potential for further earthquakes.
Mr Allen said while it was unlikely there would be an earthquake of greater magnitude, it was possible for quakes of similar size, and that it was the big-were gest earthquake sequence south of Perth since records began.
“The reason why I came along today was to give reassurance to the local community and talk to them about what we’ve learned so far from this earthquake sequence,” he said.
“What we find, with respect to the earthquake activity in South West WA, is one of the more seismically active areas in Australia.
“There is a high chance of more, large earthquakes like this in the Lake Muir region, but the chances of these earthquakes of getting much bigger are probably quite low.”
Mr Allen said one of the reasons this was believed was because the region’s geology “constrained” the size of the earthquake rupture.
He added that earthquakes unpredictable and difficult to forecast.
Mr Allen also spoke about the importance of “citizen science”, where people used the Geoscience Australia website to record the “felt reports” from seismic activity.
Department of Fire and Emergency Services natural disasters district officer Leon Gardiner said he was happy with the session and the crowd of more than 70 people.
“The content we were able to provide from a Geoscience Australia point of view, from a DFES community preparedness point of view and having the Red Cross and Department of Communities here, has provided a good spread of information for the community,” he said.