This article below quotes a seismologist saying [Adam Pascale, a...

This article below quotes a seismologist saying
[Adam Pascale, a seismologist at the Seismology Research Centre said the earthquake occurred about 5km east of Muswellbrook at 12.01pm.
He said it was the largest in the area since 1994, and aftershocks were being recorded “every few minutes”.“Magnitude 4.8 is pretty significant, so it’s going to be felt in a large area,” he said.“Given the number of aftershocks (so far), I’d expect them to continue for weeks or months.”


‘Bit rattled and shocked’: Hunter Valley residents recount 4.8 magnitude earthquake
Experts are reporting a 4.8 magnitude quake occurred north of Sydney around midday on Friday, with residents now sharing their accounts.
Friday 23Aug24
https://www.news.com.au/technology/environment/reports-of-buildings-shaking-in-sydney-after-hunter-valley-earthquake/news-story/dab374da96ee30cf70b0435f653ca899

It seems to me Geoscience Australia could look at increasing the number of seismographs we have installed up n down the eastern seaboard.
The cost would be chicken-feed compared to other ways Gov's waste money and would greatly increase certainty around data from future earthquakes .