Sites reportedly affected by the AWS outage included Domain, Dominos, Fox Sports, Foxtel, Menulog, Stan and The Iconic.
According to Amazon, "a significant number of EC2 instances and EBS volumes within a single Availability Zone in the AP-SOUTHEAST-2 Region experienced a loss of power."
Power was restored in just over an hour, and an hour and a quarter later "80% of the affected instances and volumes had been recovered by our automated systems".
AWS wasn't the only provider affected by power issues over the weekend. Several banks experienced problems.
Bank of Queensland, IMB Bank, Me Bank and Westpac all suffered ATM and EFTPOS outages. Westpac also had a problem with its mobile banking app.
While Commonwealth Bank's own online services kept working, the bank's market share meant some of its customers were indirectly affected by problems at an unspecified EFTPOS provider.