# Solar storm impact on US GPS accuracy

> Live situation record from CLSTR: https://clstr.news/situations/solar-storm-impact-on-us-gps-accuracy
> Updated: 2026-09-06T08:46:58.000Z. Sources: 7. Developments: 2.

A severe G4-level solar storm occurring in November 2025 caused significant disruptions to Global Positioning System (GPS) accuracy across the continental United States. Triggered by coronal mass ejections interacting with Earth’s magnetic field, the geomagnetic disturbances altered the ionosphere and created intense density gradients in the upper atmosphere.

These fluctuations resulted in horizontal positioning errors exceeding 10 meters (33 feet). The inaccuracies impacted various critical sectors, including aviation, maritime navigation, drone technology, drilling operations, and precision agriculture. Additionally, the solar activity forced NASA to delay a Mars-bound spacecraft launch.

## Timeline

### 2026-09-06: Solar storm disrupts US GPS accuracy by over 10 meters

A severe G4-level solar storm in November 2025 caused GPS accuracy errors exceeding 10 meters in parts of the U.S., impacting aviation, maritime, and satellite communications.

2 sources. https://clstr.news/cluster/solar-storm-disrupts-us-gps-accuracy-by-over-10-meters

### 2026-09-01: Solar storm causes major GPS errors across the United States

A major solar storm in November caused GPS errors exceeding 33 feet in the US, threatening autonomous vehicles and precision agriculture while forcing NASA to delay a Mars mission.

4 sources. https://clstr.news/cluster/solar-storm-causes-major-gps-disruptions-across-the-united-states

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Cite as: Solar storm impact on US GPS accuracy. CLSTR, https://clstr.news/situations/solar-storm-impact-on-us-gps-accuracy