Geomagnetic storm triggers another worldwide Starlink outage

Starlink suffered another global outage on September 15, 2025, disrupting satellite internet service around the world just weeks after a major interruption. More than 50,000 users reported connectivity problems, including frontline units in Ukraine, customers in Michigan, and travelers using the compact Starlink Mini dish.

While Starlink didn’t specify a cause, the timing aligned with a significant space weather event. The National Oceanic and Atmospheric Administration had warned of a strong geomagnetic storm (Kp index 7 or higher, G3 or above) during the same window, a level known to trigger power grid voltage fluctuations, spacecraft surface charging and increased drag, GPS and HF radio interference, and unusually far-reaching auroras across the continental United States. Space weather can rattle low-Earth-orbit communications, so the outage may have been largely beyond SpaceX’s control.

This disruption comes on the heels of a previous, longer outage traced to human error during a capacity upgrade to Starlink’s terrestrial infrastructure. The company operates a large network of U.S. ground gateways—over a hundred sites, each with extensive antenna arrays—that backhaul satellite traffic over fiber to reduce latency, fill coverage gaps, and stabilize connections for remote users. That upgrade was designed to prepare the network for Starlink’s next big leap: V3 satellites slated to begin launching in 2026 with roughly ten times the throughput. With the upcoming Performance dish, peak download speeds are expected to exceed 1 Gbps.

The earlier service interruption tied to the gateway firmware update stretched to nearly three hours. By contrast, the September 15 outage appeared shorter, with most affected users reporting downtime of about 90 minutes.

Bottom line: Starlink’s expanding satellite internet network is marching toward gigabit-class performance, but it remains exposed to two very different risks—complex terrestrial upgrades that must be executed flawlessly, and the unpredictable power of geomagnetic storms that can jolt satellites and disrupt radio-based services across the globe.