M4.1 Earthquake 72 km SE of Palca, Peru — September 18, 2026
2026-09-18 14:42:39 UTC (1 day ago) · approx. 9:42 AM UTC-5 local
On September 18, 2026 at 14:42 UTC, a magnitude 4.1 intermediate depth earthquake struck 72 km SE of Palca, Peru, at a depth of 152.1 km and coordinates -18.1468°, -69.3940°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-69.3940°E
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Common Questions
How strong was the magnitude 4.1 earthquake near Palca, Peru?
The magnitude 4.1 earthquake that struck 72 km SE of Palca, Peru on September 18, 2026 at 14:42 UTC had a depth of 152.1 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 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000tib9). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 18, 2026). M4.1 Earthquake 72 km SE of Palca, Peru — September 18, 2026. Retrieved September 19, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000tib9/