M4.6 Earthquake near Pacific-Antarctic Ridge — December 15, 2021
2021-12-15 23:26:01 UTC (2021-12-15) · approx. 1:26 PM UTC-10 local
On December 15, 2021 at 23:26 UTC, a magnitude 4.6 shallow crustal earthquake struck near Pacific-Antarctic Ridge, at a depth of 10.0 km and coordinates -58.0396°, -146.6208°.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-146.6208°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake near Pacific-Antarctic Ridge?
The magnitude 4.6 earthquake that struck near Pacific-Antarctic Ridge on December 15, 2021 at 23:26 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 -58.0396°, -146.6208°, which is near Pacific-Antarctic Ridge.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us6000gdvg). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, December 15, 2021). M4.6 Earthquake near Pacific-Antarctic Ridge — December 15, 2021. Retrieved February 24, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000gdvg/