M4.8 Earthquake in the Balleny Islands region — February 18, 2025
2025-02-18 07:38:13 UTC (2025-02-18) · approx. 5:38 PM UTC+10 local
On February 18, 2025 at 07:38 UTC, a magnitude 4.8 shallow crustal earthquake struck in the Balleny Islands region, at a depth of 10.0 km and coordinates -62.8512°, 151.3674°. This earthquake was detected by 34 seismic stations with good location accuracy and was assigned a USGS significance rating of 354, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.8 releases seismic energy equivalent to roughly 239 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.2 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
151.3674°E
Technical Information
Common Questions
How strong was the magnitude 4.8 earthquake in the Balleny Islands region?
The magnitude 4.8 earthquake that struck in the Balleny Islands region on February 18, 2025 at 07:38 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -62.8512°, 151.3674°, which is in the Balleny Islands region.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.8 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000peg4). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, February 18, 2025). M4.8 Earthquake in the Balleny Islands region — February 18, 2025. Retrieved May 2, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000peg4/