M4.3 Earthquake 143 km SSW of Gataivai, Samoa — April 22, 2025
2025-04-22 21:44:37 UTC (2025-04-22) · approx. 9:44 AM UTC-12 local
On April 22, 2025 at 21:44 UTC, a magnitude 4.3 shallow crustal earthquake struck 143 km SSW of Gataivai, Samoa, at a depth of 10.0 km and coordinates -15.0199°, -172.7560°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-172.7560°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near Gataivai, Samoa?
The magnitude 4.3 earthquake that struck 143 km SSW of Gataivai, Samoa on April 22, 2025 at 21:44 UTC had a depth of 10.0 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 4.3 earthquakes can continue for several days and gradually diminish over time.
Actions
Location
Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000py0k). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 22, 2025). M4.3 Earthquake 143 km SSW of Gataivai, Samoa — April 22, 2025. Retrieved June 27, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000py0k/