M4.8 earthquake 106 km ENE of Georgetown, Saint Helena
A magnitude 4.8 earthquake struck 106 km ENE of Georgetown, Saint Helena on Fri, Sep 30, 1983, 7:31 AM GMT-1 (08:31 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.1 123 km NE of Georgetown, Saint Helena. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.8 (mb), light
- Local time
- UTC
- 1983-09-30 08:31:18 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 7.634° S, 13.497° W
- Region
- Saint Helena
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- OPERATOR_ASSIGNED
Nearby
Within 100 km, magnitude 1.8 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todaySaint Helena earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001yrd. Read Tue, Sep 22, 2026, 10:44 AM UTC.