M5.1 Earthquake 1 km NNE of Tonosí, Panama — October 10, 2026
2026-10-10 02:26:32 UTC (1 hour ago) · approx. 9:26 PM UTC-5 local
Aftershock of the M5.4 mainshock.
On October 10, 2026 at 02:26 UTC, a magnitude 5.1 shallow crustal earthquake struck 1 km NNE of Tonosí, Panama, at a depth of 10.0 km and coordinates 7.4178°, -80.4348°. This earthquake was detected by 60 seismic stations with good location accuracy and was assigned a USGS significance rating of 400, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.1 releases seismic energy equivalent to roughly 674 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.0 km — a useful intuition for the size of the slip patch on the fault.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.4 mainshock that occurred 4 hours ago 9 km SSE of Los Asientos, Panama. Since the mainshock, the USGS has recorded 4 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
-80.4348°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 5.1 earthquake near Tonosí, Panama?
The magnitude 5.1 earthquake that struck 1 km NNE of Tonosí, Panama on October 10, 2026 at 02:26 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 7.4178°, -80.4348°, which is 1 km NNE of Tonosí, Panama.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.1 earthquakes can continue for days to weeks and gradually diminish over time.
Is this the same earthquake as the M5.4 one earlier?
No. This magnitude 5.1 earthquake is an aftershock of the larger magnitude 5.4 mainshock that occurred earlier 9 km SSE of Los Asientos, Panama. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
Authoritative source: USGS event page (event ID: us6000u1bu). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 10, 2026). M5.1 Earthquake 1 km NNE of Tonosí, Panama — October 10, 2026. Retrieved October 10, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000u1bu/