SpaceX's Starlink suffered one of its biggest international outages on Thursday when an internal  software failure knocked tens of thousands of users offline, a rare disruption for Elon Musk's powerful satellite internet system.

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.