M4.5 Earthquake 5 km SW of San Antonio, Colombia — September 21, 2026
2026-09-21 18:48:44 UTC (1 hour ago) · approx. 1:48 PM UTC-5 local
On September 21, 2026 at 18:48 UTC, a magnitude 4.5 shallow crustal earthquake struck 5 km SW of San Antonio, Colombia, at a depth of 10.0 km and coordinates 3.8759°, -75.5116°. This earthquake was detected by 43 seismic stations with good location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-75.5116°E
Technical Information
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Common Questions
How strong was the magnitude 4.5 earthquake near San Antonio, Colombia?
The magnitude 4.5 earthquake that struck 5 km SW of San Antonio, Colombia on September 21, 2026 at 18:48 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 3.8759°, -75.5116°, which is 5 km SW of San Antonio, Colombia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000tizt). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 21, 2026). M4.5 Earthquake 5 km SW of San Antonio, Colombia — September 21, 2026. Retrieved September 21, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000tizt/