Earthquakes in El Salvador — September 2025

2 earthquakes were recorded in El Salvador during September 2025, an average of 0.1 per day.

2 reached magnitude 4 or above and 1 reached magnitude 5 or above. The average focal depth was 10 km.

The month's largest event in El Salvador was a magnitude 5.0 earthquake near Puerto El Triunfo, El Salvador on 23 September 2025 at 21:52 UTC. A magnitude 5.0 earthquake radiates roughly 477 tons of TNT equivalent in seismic energy.

That is below the El Salvador monthly average of 4 events over the period we cover — a comparatively quiet month, and down from the 4 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 1 in the magnitude 4 range, 1 in the magnitude 5 range.

The month's largest events were M5.0 near Puerto El Triunfo, El Salvador on 23 September at 10 km; M4.6 near Puerto El Triunfo, El Salvador on 18 September at 10 km.

That is 46% below the 4 events El Salvador averages per month across the 21 months on record.