A 2.5-magnitude earthquake sent tremors through the town of Barellan near midnight yesterday.
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The quake was recorded about 11.30pm on Tuesday with a depth of 10 kilometres.
Senior seismologist at Geoscience Australia Hadi Ghasemi said it was a very small earthquake, but could still be felt by residents close to the epicentre.
"So far we haven't linked any first reporters of this event, but it is likely to be felt with other examples in Australia where people have felt even smaller earthquakes," he said.
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"It is not really uncommon for people very close to the epicentre to feel a sharp movement, which passes very quickly - some people try to use a truck analogy, but it can be felt."
Mr Ghasemi said the area has experienced earthquakes in the past and this event was not unusual for the region.
"There have been 28 events within a 100 kilometre radius of the epicentre of this event during the past 10 years. It is not uncommon to have small size earthquakes in that region," he said.