M4.9 Earthquake 121 km SSW of Lotofag?, Samoa — October 4, 2020
2020-10-04 02:18:53 UTC (2020-10-04) · approx. 3:18 PM UTC-11 local
On October 4, 2020 at 02:18 UTC, a magnitude 4.9 shallow crustal earthquake struck 121 km SSW of Lotofag?, Samoa, at a depth of 10.0 km and coordinates -14.9976°, -172.2724°.
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
-172.2724°E
Technical Information
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Common Questions
How strong was the magnitude 4.9 earthquake near Lotofag?, Samoa?
The magnitude 4.9 earthquake that struck 121 km SSW of Lotofag?, Samoa on October 4, 2020 at 02:18 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 -14.9976°, -172.2724°, which is 121 km SSW of Lotofag?, Samoa.
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.
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Location
Authoritative source: USGS event page (event ID: us6000c5c2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, October 4, 2020). M4.9 Earthquake 121 km SSW of Lotofag?, Samoa — October 4, 2020. Retrieved December 12, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000c5c2/