M4.3 Earthquake 42 km WNW of Puerto Bolívar, Ecuador — October 4, 2026
2026-10-04 08:57:21 UTC (1 hour ago) · approx. 3:57 AM UTC-5 local
On October 4, 2026 at 08:57 UTC, a magnitude 4.3 shallow crustal earthquake struck 42 km WNW of Puerto Bolívar, Ecuador, at a depth of 42.9 km and coordinates -3.0707°, -80.3260°.
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
-80.3260°E
Technical Information
Common Questions
How strong was the magnitude 4.3 earthquake near Puerto Bolívar, Ecuador?
The magnitude 4.3 earthquake that struck 42 km WNW of Puerto Bolívar, Ecuador on October 4, 2026 at 08:57 UTC had a depth of 42.9 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: us6000tzhy). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 4, 2026). M4.3 Earthquake 42 km WNW of Puerto Bolívar, Ecuador — October 4, 2026. Retrieved October 4, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000tzhy/