Does Studio Lab always run in us-west-2?

While in a StudioLab terminal, I tried running:
```bash
aws ec2 describe-availability-zones --output text --query 'AvailabilityZones[0].[RegionName]'
```
which reported back:
```
us-west-2
```
This means Studio Lab is running in us-west-2, right?
Is this currently always the case?
I'm just curious about what speed to expect accessing various public datasets in different regions, and if that is likely to vary depending what region Studio Lab uses...

No file, test, or documentation entry point is named. Start by investigating how the Studio Lab terminal selects its AWS region and whether the reported us-west-2 value is fixed; done means documenting the current behavior and any regional variability relevant to public-dataset access.

Written by the indexing model from the issue text.