M4.6 Earthquake near Pacific-Antarctic Ridge — October 13, 2021
2021-10-13 17:34:23 UTC (2021-10-13) · approx. 6:34 AM UTC-11 local
On October 13, 2021 at 17:34 UTC, a magnitude 4.6 shallow crustal earthquake struck near Pacific-Antarctic Ridge, at a depth of 10.0 km and coordinates -62.9180°, -161.3138°.
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
-161.3138°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 October 13, 2021 at 17:34 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 -62.9180°, -161.3138°, 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: us6000fuaw). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 13, 2021). M4.6 Earthquake near Pacific-Antarctic Ridge — October 13, 2021. Retrieved December 18, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000fuaw/