M4.3 Earthquake 106 km ESE of Antofagasta, Chile — August 28, 2026
2026-08-28 23:48:03 UTC (3 hours ago) · approx. 6:48 PM UTC-5 local
On August 28, 2026 at 23:48 UTC, a magnitude 4.3 intermediate depth earthquake struck 106 km ESE of Antofagasta, Chile, at a depth of 77.0 km and coordinates -23.9509°, -69.3994°.
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
-69.3994°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near Antofagasta, Chile?
The magnitude 4.3 earthquake that struck 106 km ESE of Antofagasta, Chile on August 28, 2026 at 23:48 UTC had a depth of 77.0 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 4.3 earthquakes can continue for several days and gradually diminish over time.
Actions
Location
Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000tcqp). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 28, 2026). M4.3 Earthquake 106 km ESE of Antofagasta, Chile — August 28, 2026. Retrieved August 29, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000tcqp/