M4.7 Earthquake 97 km N of Amboasary, Madagascar — March 13, 2026
2026-03-13 21:09:02 UTC (2026-03-13) · approx. 12:09 AM UTC+3 local
On March 13, 2026 at 21:09 UTC, a magnitude 4.7 shallow crustal earthquake struck 97 km N of Amboasary, Madagascar, at a depth of 10.0 km and coordinates -24.1532°, 46.2964°. This earthquake was detected by 34 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 340, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.7 releases seismic energy equivalent to roughly 169 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.1 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
46.2964°E
Technical Information
Common Questions
How strong was the magnitude 4.7 earthquake near Amboasary, Madagascar?
The magnitude 4.7 earthquake that struck 97 km N of Amboasary, Madagascar on March 13, 2026 at 21:09 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 -24.1532°, 46.2964°, which is 97 km N of Amboasary, Madagascar.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 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: us6000sg5l). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, March 13, 2026). M4.7 Earthquake 97 km N of Amboasary, Madagascar — March 13, 2026. Retrieved May 20, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000sg5l/