What natural processes caused the Newcastle Earthquake?

Answer 1

It shifted land, created liquefaction, created large gaps in the ground etc.

It ruined houses and farm land and made rivers flow the other ways, it also ruined precious buildings that have been very historic and some have been there for over 100 years.

Hope this helps

Answer 2

Originally, it was proposed that there was little reason to believe that natural processes caused the Newcastle earthquake. Investigations following the earthquake suggested that it was triggered by 200 years of underground coal mining. Geoscientists from Columbia University claimed that removal of 500 mega tonnes of coal and 2000 mega tonnes of water removed from the ground reactivated a major faultline underneath the Newcastle's coalfields. Removal of millions of tonnes of coal, and the pumping out of water needed in the mining process, created enough stress to reactivate a fault line beneath the Newcastle coal fields.

However, a 2007 report cast doubts on this theory, which came from a US report. Australian geoscientists believe more factors were involved, as evidenced by the fact that minor earthquakes have occurred in the Hunter Valley coal mining region from time to time, and not necessarily close to the coal mining sites. The epicentre of the quake was simply too far underground to have been caused by coal mining alone.

For more details on possible causes of the Newcastle earthquake, see the link below.

Answer 3

The Newcastle Earthquake in 1989 was caused by movement along a fault line within the Earth's crust. In this case, the earthquake was the result of the Hunter Region segment of the Pairs-Sydney Basin seismic zone experiencing a release of stress built up over time. This release of stress caused the sudden movement of rock layers along the fault, resulting in the earthquake.

Answer 4

No. There were no warning signals prior to the Newcastle earthquakes.

Answer 5

Buildings

Answer 6

h