M4.8 Earthquake near South Shetland Islands — September 12, 2021
2021-09-12 03:58:21 UTC (2021-09-12) · approx. 11:58 PM UTC-4 local
On September 12, 2021 at 03:58 UTC, a magnitude 4.8 shallow crustal earthquake struck near South Shetland Islands, at a depth of 10.0 km and coordinates -62.3576°, -57.9657°.
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
-57.9657°E
Technical Information
Common Questions
How strong was the magnitude 4.8 earthquake near South Shetland Islands?
The magnitude 4.8 earthquake that struck near South Shetland Islands on September 12, 2021 at 03:58 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 -62.3576°, -57.9657°, which is near South Shetland Islands.
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: us7000fafu). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, September 12, 2021). M4.8 Earthquake near South Shetland Islands — September 12, 2021. Retrieved November 23, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000fafu/