4.0

M4.0 Earthquake 237 km ENE of Levuka, Fiji — July 5, 2023

2023-07-05 16:22:04 UTC (2023-07-05) · approx. 4:22 AM UTC-12 local

MagnitudeM4.0(mb)
Time16:22 UTC≈ 4:22 AM UTC-12
Depth528.0 kmdeep-focus
Coordinates-17.659°, -178.486°
Felt byNo felt reports
Status✓ Reviewed by USGS

On July 5, 2023 at 16:22 UTC, a magnitude 4.0 deep-focus earthquake struck 237 km ENE of Levuka, Fiji, at a depth of 528.0 km and coordinates -17.6590°, -178.4863°.

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 -17.66°, -178.49°

Earthquake Details

Magnitude
4.0 mb
Depth
528.0 km
deep-focus
Location
-17.6590°N
-178.4863°E

Technical Information

Event ID
us7000kfeh
Event Type
earthquake
Status
✓ Reviewed
Significance
246
Stations Used
30
Azimuthal Gap
95.0°
Min Station Distance
3.300°
RMS Residual
0.58 sec
Last Updated
2023-09-09 21:55:15 UTC

Common Questions

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

The magnitude 4.0 earthquake that struck 237 km ENE of Levuka, Fiji on July 5, 2023 at 16:22 UTC had a depth of 528.0 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: us7000kfeh). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2023, July 5, 2023). M4.0 Earthquake 237 km ENE of Levuka, Fiji — July 5, 2023. Retrieved September 9, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000kfeh/