Earthquakes in Saint Helena

No events have been recorded in Saint Helena in the past 30 days, and 5 of the events on record reached magnitude 5 or above — the level at which damage becomes a genuine concern for vulnerable construction. Activity here is almost entirely crustal, which means shaking at the surface is strong relative to the magnitudes involved.

6 earthquakes have been recorded in Saint Helena in our catalogue, 0 of them in the past 30 days.

The average magnitude is 5.1 and the average focal depth 10 km. 6 events reached magnitude 4 or above and 5 reached magnitude 5 or above.

The strongest earthquake recorded in Saint Helena in this period was a magnitude 5.5 event near Georgetown, Saint Helena on 20 June 2026, at a depth of 10 km. A magnitude 5.5 earthquake radiates roughly 2,682 tons of TNT equivalent in seismic energy.

Locations recording the most events include Georgetown (6).

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, 5 in the magnitude 5 range.

The busiest single day was 20 January 2026, with 2 recorded events.

No event in this record carries a USGS link to NOAA tsunami information.