M4.3 Earthquake 18 km ENE of San Marcos, Colombia — August 6, 2026
2026-08-06 06:52:59 UTC (2026-08-06) · approx. 1:52 AM UTC-5 local
On August 6, 2026 at 06:52 UTC, a magnitude 4.3 shallow crustal earthquake struck 18 km ENE of San Marcos, Colombia, at a depth of 51.7 km and coordinates 8.7076°, -74.9712°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-74.9712°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near San Marcos, Colombia?
The magnitude 4.3 earthquake that struck 18 km ENE of San Marcos, Colombia on August 6, 2026 at 06:52 UTC had a depth of 51.7 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000tiif). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 6, 2026). M4.3 Earthquake 18 km ENE of San Marcos, Colombia — August 6, 2026. Retrieved August 12, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000tiif/