M4.3 Earthquake 23 km SW of Puerto San José, Guatemala — September 17, 2026
2026-09-17 05:26:52 UTC (2026-09-17) · approx. 11:26 PM UTC-6 local
On September 17, 2026 at 05:26 UTC, a magnitude 4.3 shallow crustal earthquake struck 23 km SW of Puerto San José, Guatemala, at a depth of 59.9 km and coordinates 13.8071°, -91.0031°.
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
-91.0031°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near Puerto San José, Guatemala?
The magnitude 4.3 earthquake that struck 23 km SW of Puerto San José, Guatemala on September 17, 2026 at 05:26 UTC had a depth of 59.9 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: us6000tx3x). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 17, 2026). M4.3 Earthquake 23 km SW of Puerto San José, Guatemala — September 17, 2026. Retrieved September 27, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000tx3x/