SpaceX's Starlink satellite network was back up and running on Friday as engineers hunted for the root cause of one of its biggest international outages the night before, a rare disruption for the powerful internet system set off by an internal software failure.

Since Thursday's outage, a few Starlink users have reported faster speeds, raising speculation that the outage happened while SpaceX was trying to upgrade its network.

Starlink experienced an outage Thursday afternoon that went on for 2.5 hours and took down tens of thousands of peopl