4.0

M4.0 Earthquake 283 km SE of Levuka, Fiji — August 1, 2021

2021-08-01 22:12:46 UTC (2021-08-01) · approx. 10:12 AM UTC-12 local

MagnitudeM4.0(mb)
Time22:12 UTC≈ 10:12 AM UTC-12
Depth669.5 kmdeep-focus
Coordinates-20.099°, -179.047°
Felt byNo felt reports
Status✓ Reviewed by USGS

On August 1, 2021 at 22:12 UTC, a magnitude 4.0 deep-focus earthquake struck 283 km SE of Levuka, Fiji, at a depth of 669.5 km and coordinates -20.0989°, -179.0470°.

Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at -20.10°, -179.05°

Earthquake Details

Magnitude
4.0 mb
Depth
669.5 km
deep-focus
Location
-20.0989°N
-179.0470°E

Technical Information

Event ID
us6000f2w3
Event Type
earthquake
Status
✓ Reviewed
Significance
246
Azimuthal Gap
122.0°
Min Station Distance
3.608°
RMS Residual
0.41 sec
Last Updated
2021-10-14 01:08:25 UTC

Common Questions

How strong was the magnitude 4.0 earthquake near Levuka, Fiji?

The magnitude 4.0 earthquake that struck 283 km SE of Levuka, Fiji on August 1, 2021 at 22:12 UTC had a depth of 669.5 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 4.0 earthquakes can continue for several days and gradually diminish over time.

Understanding This Data

Magnitude 4.0 earthquakes are often felt but rarely cause damage.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: us6000f2w3). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2021, August 1, 2021). M4.0 Earthquake 283 km SE of Levuka, Fiji — August 1, 2021. Retrieved October 14, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000f2w3/