M4.8 Earthquake 293 km ENE of Georgetown, Saint Helena — April 12, 2025
2025-04-12 06:40:13 UTC (2025-04-12) · approx. 5:40 AM UTC-1 local
On April 12, 2025 at 06:40 UTC, a magnitude 4.8 shallow crustal earthquake struck 293 km ENE of Georgetown, Saint Helena, at a depth of 10.0 km and coordinates -6.6902°, -12.0561°. This earthquake was detected by 27 seismic stations with good location accuracy and was assigned a USGS significance rating of 354, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.8 releases seismic energy equivalent to roughly 239 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.2 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-12.0561°E
Technical Information
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Common Questions
How strong was the magnitude 4.8 earthquake near Georgetown, Saint Helena?
The magnitude 4.8 earthquake that struck 293 km ENE of Georgetown, Saint Helena on April 12, 2025 at 06:40 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -6.6902°, -12.0561°, which is 293 km ENE of Georgetown, Saint Helena.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.8 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000pv24). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 12, 2025). M4.8 Earthquake 293 km ENE of Georgetown, Saint Helena — April 12, 2025. Retrieved June 14, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pv24/