M4.9 Earthquake near western Indian-Antarctic Ridge — August 17, 2025
2025-08-17 09:01:20 UTC (2025-08-17) · approx. 5:01 PM UTC+8 local
On August 17, 2025 at 09:01 UTC, a magnitude 4.9 shallow crustal earthquake struck near western Indian-Antarctic Ridge, at a depth of 10.0 km and coordinates -47.8478°, 115.9885°. This earthquake was detected by 38 seismic stations with excellent 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.
Earthquake Details
115.9885°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near western Indian-Antarctic Ridge?
The magnitude 4.9 earthquake that struck near western Indian-Antarctic Ridge on August 17, 2025 at 09:01 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 -47.8478°, 115.9885°, which is near western Indian-Antarctic Ridge.
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.
Actions
Location
Authoritative source: USGS event page (event ID: us6000r1pw). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, August 17, 2025). M4.9 Earthquake near western Indian-Antarctic Ridge — August 17, 2025. Retrieved November 4, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000r1pw/