The quake was recorded 7km from Denman in the Upper Hunter Region, 250km north of Sydney, at a depth of 10km shortly before 12.15pm on Tuesday.
There were fears in Australia when over 300 people reported feeling the 4.1 magnitude earthquake in the Hunter Valley, Central Coast, Scone and Penrith in western Sydney.
The quake was recorded 7km from Denman in the Upper Hunter Region, 250km north of Sydney, at a depth of 10km shortly before 12.15pm on Tuesday.
This is according to Geoscience Australia.
According to power supplier Ausgrid, more than 2,500 addresses are currently without power, although no injuries have been reported.
Different reactions have however followed the development especially on micro-blogging platform, X.
"What the hell is going on?"one wrote on social media platform X.
"Felt in the Hunter Valley," a second witness added.
A third added: "How many times is that now in the last 6 months?"
Reacting however, the Bureau of Meteorology noted that there is no tsunami threat to Australia.
Senior seismologist Dr Hadi Ghasemi from GeoScience Australia described it as an "earthquake swarm."
"In earthquake swarms, you have a series of the earthquakes with similar size magnitudes — it's not like an aftershock sequence," he told ABC.
"In this region, since the magnitude-4.7 in August, we've recorded over 50 earthquakes, four of them with magnitudes larger than 4, including the recent one."
Dr Ghasemi warned residents of the possibility of further tremors being felt.
"All of the previous magnitude-4 ones in this region, they were followed by smaller aftershocks," he said.