> Customers lost access to virtual machines and disks in the availability zone. The other two zones in the region were less affected, with Google reporting less than one percent of operations experiencing internal errors.

Contrary to the article's title, it looks like this was a zonal rather than regional outage.

GCP incident report (also linked in the article): https://status.cloud.google.com/incidents/e3yQSE1ysCGjCVEn2q...