More quakes pos­si­ble

Manjimup-Bridgetown Times - - News - Tari Jef­fers

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.

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