M4.1 Earthquake in the Fiji region — August 21, 2020
2020-08-21 22:30:13 UTC (2020-08-21) · approx. 10:30 AM UTC-12 local
On August 21, 2020 at 22:30 UTC, a magnitude 4.1 deep-focus earthquake struck in the Fiji region, at a depth of 582.7 km and coordinates -21.9172°, -179.6106°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-179.6106°E
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Common Questions
How strong was the magnitude 4.1 earthquake in the Fiji region?
The magnitude 4.1 earthquake that struck in the Fiji region on August 21, 2020 at 22:30 UTC had a depth of 582.7 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000bdry). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, August 21, 2020). M4.1 Earthquake in the Fiji region — August 21, 2020. Retrieved October 31, 2020 from https://www.earthquaketracker.org/earthquakes/event/us7000bdry/