4.9

M4.9 Earthquake south of the Kermadec IslandsSeptember 5, 2024

2024-09-05 08:25:17 UTC (2024-09-05) · approx. 8:25 PM UTC-12 local

MagnitudeM4.9(mb)
Time08:25 UTC8:25 PM UTC-12
Depth35.0 kmshallow crustal
Coordinates-33.770°, -179.472°
Felt byNo felt reports
Status✓ Reviewed by USGS

On September 5, 2024 at 08:25 UTC, a magnitude 4.9 shallow crustal earthquake struck south of the Kermadec Islands, at a depth of 35.0 km and coordinates -33.7702°, -179.4716°. This earthquake was detected by 33 seismic stations with good location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.

Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at -33.77°, -179.47°

Earthquake Details

Magnitude
4.9 mb
Depth
35.0 km
shallow crustal
Location
-33.7702°N
-179.4716°E

Technical Information

Event ID
us6000nptr
Event Type
earthquake
Status
✓ Reviewed
Significance
369
Stations Used
33
Azimuthal Gap
130.0°
Min Station Distance
4.194°
RMS Residual
0.63 sec
Last Updated
2024-11-15 16:19:56 UTC

Common Questions

How strong was the magnitude 4.9 earthquake south of the Kermadec Islands?

The magnitude 4.9 earthquake that struck south of the Kermadec Islands on September 5, 2024 at 08:25 UTC had a depth of 35.0 km. For context, this was a light earthquake commonly felt near the epicenter.

Where did the earthquake occur?

The earthquake epicenter was located at -33.7702°, -179.4716°, which is south of the Kermadec Islands.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.

Authoritative source: USGS event page (event ID: us6000nptr). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2024, September 5, 2024). M4.9 Earthquake south of the Kermadec IslandsSeptember 5, 2024. Retrieved November 15, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000nptr/