M4.5 Earthquake 22 km NW of Zaragoza, Colombia — October 21, 2023
2023-10-21 23:39:00 UTC (2023-10-21) · approx. 6:39 PM UTC-5 local
On October 21, 2023 at 23:39 UTC, a magnitude 4.5 shallow crustal earthquake struck 22 km NW of Zaragoza, Colombia, at a depth of 59.0 km and coordinates 7.6175°, -75.0255°. This earthquake was detected by 70 seismic stations with excellent 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
-75.0255°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.5 earthquake near Zaragoza, Colombia?
The magnitude 4.5 earthquake that struck 22 km NW of Zaragoza, Colombia on October 21, 2023 at 23:39 UTC had a depth of 59.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 7.6175°, -75.0255°, which is 22 km NW of Zaragoza, 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: us6000lh80). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, October 21, 2023). M4.5 Earthquake 22 km NW of Zaragoza, Colombia — October 21, 2023. Retrieved December 26, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000lh80/