M4.0 Earthquake 11 km N of Saint-Louis du Sud, Haiti — August 15, 2021
2021-08-15 19:46:43 UTC (2021-08-15) · approx. 2:46 PM UTC-5 local
On August 15, 2021 at 19:46 UTC, a magnitude 4.0 shallow crustal earthquake struck 11 km N of Saint-Louis du Sud, Haiti, at a depth of 10.0 km and coordinates 18.3654°, -73.5289°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-73.5289°E
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Common Questions
How strong was the magnitude 4.0 earthquake near Saint-Louis du Sud, Haiti?
The magnitude 4.0 earthquake that struck 11 km N of Saint-Louis du Sud, Haiti on August 15, 2021 at 19:46 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000f4ad). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, August 15, 2021). M4.0 Earthquake 11 km N of Saint-Louis du Sud, Haiti — August 15, 2021. Retrieved October 29, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000f4ad/