Earthquakes in the United States — September 2026

7106 earthquakes were recorded in the United States during September 2026, an average of 236.9 per day.

103 reached magnitude 4 or above and 25 reached magnitude 5 or above. The average focal depth was 15 km.

The month's largest event in the United States was a magnitude 6.5 earthquake near Nikolski, United States on 17 September 2026 at 14:19 UTC. A magnitude 6.5 earthquake radiates roughly 84,802 tons of TNT equivalent in seismic energy.

That is close to the the United States monthly average of 7087 events over the period we cover, and down from the 7870 recorded the previous month.

94% of events here are shallow (under 70 km), 6% intermediate (70–300 km) and 0% deep-focus (over 300 km). Almost everything here is crustal. That is characteristic of transform faulting or continental deformation rather than subduction — and it means shaking at the surface is strong for the magnitudes involved.

By band, the catalogue holds 11 in the magnitude -2 range, 216 in the magnitude -1 range, 1866 in the magnitude 0 range, 3435 in the magnitude 1 range, 1179 in the magnitude 2 range, 296 in the magnitude 3 range.

Activity peaked on 03 September, when 376 events were recorded.

14 event(s) this month carry a USGS link to NOAA tsunami information; the flag does not indicate whether a tsunami occurred.

The month's largest events were M6.5 near Nikolski, United States on 17 September at 98 km; M6.4 near Nikolski, United States on 17 September at 115 km; M6.3 near Nikolski, United States on 17 September at 83 km.

That is close to the 7087 events the United States averages per month across the 23 months on record.