Authorities were assessing critical dams in the area, including Warragamba.
Thousands of residents felt the ground shift under their feet when a 3.6 magnitude earthquake reverberated through Sydney’s west, as nearby Warragamba Dam escaped damage, on Friday night.
WaterNSW said an initial assessment of critical dams in the catchment area, including Warragamba, under its safety protocols “confirmed no safety risk resulting from the seismic event” on Saturday.“Precautionary inspections continue this morning, but the seismic activity was well below the threshold that would pose any threat to WaterNSW dam infrastructure,” the agency said.
Ghasemi said a 2.0 magnitude aftershock was recorded about one kilometre north roughly two hours after the initial earthquake, which occurred at 8.53pm and was logged at a depth of eight kilometres.“Aftershocks are always a possibility, but generally speaking, the size of the aftershocks becomes smaller, and they become less frequent, over time.”
Ghasemi said about 5280 people had lodged online reports – which he said the agency used to make its maps more accurate – indicating the intensity of shaking they felt on Friday night.Most had reported weak or light ground movement.Ghasemi said the agency had logged nearly 100 earthquakes, or an average of five per year, within a 100-kilometre radius of Friday’s earthquake in the past two decades. A 3.
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