M4.3 Earthquake 16 km NNE of Puyo, Ecuador — September 25, 2025
2025-09-25 23:40:15 UTC (2025-09-25) · approx. 6:40 PM UTC-5 local
On September 25, 2025 at 23:40 UTC, a magnitude 4.3 intermediate depth earthquake struck 16 km NNE of Puyo, Ecuador, at a depth of 171.3 km and coordinates -1.3530°, -77.9383°.
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
-77.9383°E
Technical Information
Common Questions
How strong was the magnitude 4.3 earthquake near Puyo, Ecuador?
The magnitude 4.3 earthquake that struck 16 km NNE of Puyo, Ecuador on September 25, 2025 at 23:40 UTC had a depth of 171.3 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.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000rcz1). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 25, 2025). M4.3 Earthquake 16 km NNE of Puyo, Ecuador — September 25, 2025. Retrieved December 11, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000rcz1/