[technion]

I don't know where AWS is in Sydney, but I'd be surprised if they had a lot of options for doing better than this small stretch of Equinix area.

Aside from Equinix, the are the two Global Switch buildings literally next to each other, and there's NextDC.

[niftich]

In Sydney, Digital Reality opened a site in 2012 out in the western suburb of Erskine Park, almost 40 km from the CBD, but within 3 km of the Transgid Sydney West 330/132kV Substation, one of the key pieces of power supply infrastructure in the Sydney Metro. That facility has 4 separate bays where a tenant can operate a full data center [1].

NextDC is in Macquarie Park, ~10 km from the CBD, and is adjacent to one from Fujitsu and one from Macquarie Telecom.

Siting in these three areas, for example, would confer a decent amount of geographic separation.

[1] https://www.digitalrealty.com/data-centers/sydney/#goto-1718