M4.9 Earthquake in the South Georgia Island region — May 12, 2025
2025-05-12 06:20:38 UTC (2025-05-12) · approx. 4:20 AM UTC-2 local
On May 12, 2025 at 06:20 UTC, a magnitude 4.9 shallow crustal earthquake struck in the South Georgia Island region, at a depth of 10.0 km and coordinates -54.9669°, -32.4934°. This earthquake was detected by 65 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-32.4934°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake in the South Georgia Island region?
The magnitude 4.9 earthquake that struck in the South Georgia Island region on May 12, 2025 at 06:20 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 -54.9669°, -32.4934°, which is in the South Georgia Island region.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000pys2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, May 12, 2025). M4.9 Earthquake in the South Georgia Island region — May 12, 2025. Retrieved July 24, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pys2/