Earthquakes in Canada — September 2025

34 earthquakes were recorded in Canada during September 2025, an average of 1.1 per day.

1 reached magnitude 4 or above and 0 reached magnitude 5 or above. The average focal depth was 4 km.

The month's largest event in Canada was a magnitude 4.0 earthquake near Port McNeill, Canada on 07 September 2025 at 15:00 UTC. A magnitude 4.0 earthquake radiates roughly 15 tons of TNT equivalent in seismic energy.

That is well above the Canada monthly average of 21 events over the period we cover — an unusually active month, and up from the 21 recorded the previous month.

100% of events here are shallow (under 70 km), 0% 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 4 in the magnitude 0 range, 17 in the magnitude 1 range, 12 in the magnitude 2 range, 1 in the magnitude 4 range.

Activity peaked on 22 September, when 3 events were recorded.

The month's largest events were M4.0 near Port McNeill, Canada on 07 September at 10 km; M2.8 near Notre-Dame-du-Mont-Carmel, Canada on 22 September at 10 km; M2.6 near Cowichan Bay, Canada on 18 September at 10 km.

That is 61% above the 21 events Canada averages per month across the 21 months on record.