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Second earthquake rocks South Australia this week

Jamestown and its surrounding areas in South Australia were shaken by a 4.1 magnitude earthquake Wednesday afternoon.

A 4.2 magnitude earthquake shook the mid-north region of the state on Wednesday afternoon, with potential for additional aftershocks. Reports indicate that people over 50km away felt the tremor, which occurred around 4:06pm near Jamestown. Within two hours, over 160 felt reports were received.

Chief Seismologist David Love stated that the epicentre was located just northeast of the town, likely at a depth of 5km or less.

This is the second earthquake recorded in South Australia this week, after the Adelaide Hills experienced a minor earthquake late Monday evening, causing slight tremors across the metropolitan area but resulting in no significant damage.

The quake, measuring 2.7 on the Richter scale, originated under Mount Barker at a depth of 22 kilometers, occurring at approximately 7:16pm.

Despite the quake’s relatively low magnitude, over 300 reports were filed by residents within two hours of the event, according to data from the Seismological Association of Australia.

This was not the first seismic activity in the region; the Adelaide Hills have a history of similar events. A more noticeable earthquake of magnitude 3.7 was recorded in March 2022.

Adelaide experiences frequent earthquakes due to its location atop several fault lines. These include the Para Fault, stretching from Gawler through the northern suburbs and under the CBD, and the Eden-Burnside Fault, traversing the southern and eastern suburbs.

In addition, there’s the Willunga fault line, winding its path from the southern Adelaide Hills, west of the Mt Bold Reservoir, through Willunga, and extending to Sellicks Beach.

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