M4.5 Earthquake 18 km NNW of Locumba, Peru — September 15, 2025
2025-09-15 20:07:17 UTC (2025-09-15) · approx. 3:07 PM UTC-5 local
On September 15, 2025 at 20:07 UTC, a magnitude 4.5 intermediate depth earthquake struck 18 km NNW of Locumba, Peru, at a depth of 97.1 km and coordinates -17.4649°, -70.8409°. This earthquake was detected by 35 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.
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
-70.8409°E
Technical Information
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Common Questions
How strong was the magnitude 4.5 earthquake near Locumba, Peru?
The magnitude 4.5 earthquake that struck 18 km NNW of Locumba, Peru on September 15, 2025 at 20:07 UTC had a depth of 97.1 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -17.4649°, -70.8409°, which is 18 km NNW of Locumba, Peru. View all earthquakes in Peru.
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.
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 4.5 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: us7000qwdf). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 15, 2025). M4.5 Earthquake 18 km NNW of Locumba, Peru — September 15, 2025. Retrieved May 28, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000qwdf/