That outtage gives GCE at best a four 9's reliability for 2016.
It looks like GCE uptime is well below four 9's reliability for a sliding 1 year timeframe.
"On Tuesday 23 February 2016, for a duration of
10 hours and 6 minutes, 7.8% of Google Compute Engine
projects had reduced quotas. ... Any resources that
were already created were unaffected by this issue."
That said, this is the second major asia-east1 downtime in 90 days:
The other incidents (as far as I can tell), were service disruptions at the AZ/regional level. Those disruptions don't impact the 9's, as GCE was available for other regions.