M4.9 Earthquake near South Indian Ocean — April 23, 2026
2026-04-23 10:21:33 UTC (2026-04-23) · approx. 3:21 PM UTC+5 local
On April 23, 2026 at 10:21 UTC, a magnitude 4.9 shallow crustal earthquake struck near South Indian Ocean, at a depth of 10.0 km and coordinates -27.5423°, 82.1047°. This earthquake was detected by 41 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
82.1047°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near South Indian Ocean?
The magnitude 4.9 earthquake that struck near South Indian Ocean on April 23, 2026 at 10:21 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 -27.5423°, 82.1047°, which is near South Indian Ocean.
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.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Authoritative source: USGS event page (event ID: us7000sh9y). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, April 23, 2026). M4.9 Earthquake near South Indian Ocean — April 23, 2026. Retrieved June 10, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000sh9y/