M4.6 Earthquake 80 km S of Pacocha, Peru — October 25, 2025
2025-10-25 22:09:35 UTC (2025-10-25) · approx. 5:09 PM UTC-5 local
On October 25, 2025 at 22:09 UTC, a magnitude 4.6 shallow crustal earthquake struck 80 km S of Pacocha, Peru, at a depth of 34.6 km and coordinates -18.3721°, -71.3946°. This earthquake was detected by 32 seismic stations with good location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Peru, a region characterized by the northern Peru-Chile subduction zone, complicated by the subduction of the Nazca Ridge. The nearest mapped fault system is the Peru-Chile Trench. View all earthquakes in Peru.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
-71.3946°E
Technical Information
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Common Questions
How strong was the magnitude 4.6 earthquake near Pacocha, Peru?
The magnitude 4.6 earthquake that struck 80 km S of Pacocha, Peru on October 25, 2025 at 22:09 UTC had a depth of 34.6 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -18.3721°, -71.3946°, which is 80 km S of Pacocha, Peru. View all earthquakes in Peru.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Has Peru had earthquakes this big before?
The largest recorded earthquake in Peru was the M8.0 Arequipa earthquake of June 23, 2001. Today's magnitude 4.6 event is significantly smaller than that historical record.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Authoritative source: USGS event page (event ID: us6000rjhe). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, October 25, 2025). M4.6 Earthquake 80 km S of Pacocha, Peru — October 25, 2025. Retrieved May 26, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rjhe/