4.1

M4.1 Earthquake 223 km E of Levuka, FijiOctober 25, 2021

2021-10-25 21:54:44 UTC (2021-10-25) · approx. 9:54 AM UTC-12 local

MagnitudeM4.1(mb)
Time21:54 UTC9:54 AM UTC-12
Depth586.1 kmdeep-focus
Coordinates-17.749°, -178.597°
Felt byNo felt reports
Status✓ Reviewed by USGS

On October 25, 2021 at 21:54 UTC, a magnitude 4.1 deep-focus earthquake struck 223 km E of Levuka, Fiji, at a depth of 586.1 km and coordinates -17.7489°, -178.5972°.

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.

Map showing earthquake epicenter at -17.75°, -178.60°

Earthquake Details

Magnitude
4.1 mb
Depth
586.1 km
deep-focus
Location
-17.7489°N
-178.5972°E

Technical Information

Event ID
us7000fpsp
Event Type
earthquake
Status
✓ Reviewed
Significance
259
Azimuthal Gap
137.0°
Min Station Distance
3.192°
RMS Residual
0.59 sec
Last Updated
2022-01-08 17:43:43 UTC

Common Questions

How strong was the magnitude 4.1 earthquake near Levuka, Fiji?

The magnitude 4.1 earthquake that struck 223 km E of Levuka, Fiji on October 25, 2021 at 21:54 UTC had a depth of 586.1 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.

Understanding This Data

Magnitude 4.1 earthquakes are often felt but rarely cause damage.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: us7000fpsp). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2021, October 25, 2021). M4.1 Earthquake 223 km E of Levuka, FijiOctober 25, 2021. Retrieved January 8, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000fpsp/