Operations at BHP's Mount Arthur coal mine in the Hunter Valley stopped for a site-wide inspection after a 4.1 magnitude earthquake reverberated across the region near Muswellbrook on Tuesday afternoon.
Thousands of homes around the greater Muswellbrook area had the power cut, as hundreds of reports came in of people feeling the earth move around 1pm on November 12. Geoscience Australia, the body that measures and observes seismic activity around the country, estimated the quake's magnitude at 4.1, at an approximate depth of three kilometres below the surface, the latest in a swarm event that has rocked the region since August.
