Earthquakes in the United States — August 2025

7334 earthquakes were recorded in the United States during August 2025, an average of 236.6 per day.

29 reached magnitude 4 or above and 9 reached magnitude 5 or above. The average focal depth was 13 km.

The month's largest event in the United States was a magnitude 5.9 earthquake near Adak, United States on 28 August 2025 at 11:07 UTC. A magnitude 5.9 earthquake radiates roughly 10,676 tons of TNT equivalent in seismic energy.

That is close to the the United States monthly average of 7168 events over the period we cover, and down from the 8473 recorded the previous month.

95% of events here are shallow (under 70 km), 5% 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, 420 in the magnitude -1 range, 2450 in the magnitude 0 range, 3508 in the magnitude 1 range, 771 in the magnitude 2 range, 145 in the magnitude 3 range.

Activity peaked on 21 August, when 315 events were recorded.

6 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 M5.9 near Adak, United States on 28 August at 134 km; M5.8 near Adak, United States on 28 August at 135 km; M5.5 near Adak, United States on 29 August at 83 km.

That is close to the 7168 events the United States averages per month across the 21 months on record.