M4.4 Earthquake 11 km NNW of Iray, Peru — October 21, 2025
2025-10-21 22:57:04 UTC (2025-10-21) · approx. 5:57 PM UTC-5 local
On October 21, 2025 at 22:57 UTC, a magnitude 4.4 shallow crustal earthquake struck 11 km NNW of Iray, Peru, at a depth of 10.0 km and coordinates -15.7533°, -72.6556°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-72.6556°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Iray, Peru?
The magnitude 4.4 earthquake that struck 11 km NNW of Iray, Peru on October 21, 2025 at 22:57 UTC had a depth of 10.0 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000rijy). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, October 21, 2025). M4.4 Earthquake 11 km NNW of Iray, Peru — October 21, 2025. Retrieved January 9, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rijy/