4.0

M4.0 Earthquake in the Fiji regionOctober 8, 2024

2024-10-08 22:47:56 UTC (2024-10-08) · approx. 10:47 AM UTC-12 local

MagnitudeM4.0(mb)
Time22:47 UTC10:47 AM UTC-12
Depth538.1 kmdeep-focus
Coordinates-21.329°, -178.660°
Felt byNo felt reports
Status✓ Reviewed by USGS

On October 8, 2024 at 22:47 UTC, a magnitude 4.0 deep-focus earthquake struck in the Fiji region, at a depth of 538.1 km and coordinates -21.3286°, -178.6596°.

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 -21.33°, -178.66°

Earthquake Details

Magnitude
4.0 mb
Depth
538.1 km
deep-focus
Location
-21.3286°N
-178.6596°E

Technical Information

Event ID
us7000nntx
Event Type
earthquake
Status
✓ Reviewed
Significance
246
Stations Used
22
Azimuthal Gap
103.0°
Min Station Distance
3.227°
RMS Residual
0.87 sec
Last Updated
2024-12-23 15:47:45 UTC

Common Questions

How strong was the magnitude 4.0 earthquake in the Fiji region?

The magnitude 4.0 earthquake that struck in the Fiji region on October 8, 2024 at 22:47 UTC had a depth of 538.1 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 4.0 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: us7000nntx). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2024, October 8, 2024). M4.0 Earthquake in the Fiji regionOctober 8, 2024. Retrieved December 23, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000nntx/