M3.9 Earthquake 22 km NNE of Ta`?, American Samoa — August 26, 2022
2022-08-26 22:43:53 UTC (2022-08-26) · approx. 11:43 AM UTC-11 local
On August 26, 2022 at 22:43 UTC, a magnitude 3.9 shallow crustal earthquake struck 22 km NNE of Ta`?, American Samoa, at a depth of 10.0 km and coordinates -14.0355°, -169.4532°.
Physical scale: An earthquake of magnitude 3.9 releases seismic energy equivalent to roughly 11 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 296 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-169.4532°E
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Common Questions
How strong was the magnitude 3.9 earthquake near Ta`?, American Samoa?
The magnitude 3.9 earthquake that struck 22 km NNE of Ta`?, American Samoa on August 26, 2022 at 22:43 UTC had a depth of 10.0 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.9 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.9 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000it77). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, August 26, 2022). M3.9 Earthquake 22 km NNE of Ta`?, American Samoa — August 26, 2022. Retrieved November 1, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000it77/