M4.2 Earthquake 48 km SSE of Irpa Irpa, Bolivia — September 15, 2026
2026-09-15 13:50:21 UTC (5 hours ago) · approx. 9:50 AM UTC-4 local
On September 15, 2026 at 13:50 UTC, a magnitude 4.2 deep-focus earthquake struck 48 km SSE of Irpa Irpa, Bolivia, at a depth of 363.5 km and coordinates -18.1008°, -66.0517°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.0517°E
Technical Information
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Common Questions
How strong was the magnitude 4.2 earthquake near Irpa Irpa, Bolivia?
The magnitude 4.2 earthquake that struck 48 km SSE of Irpa Irpa, Bolivia on September 15, 2026 at 13:50 UTC had a depth of 363.5 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000thlk). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 15, 2026). M4.2 Earthquake 48 km SSE of Irpa Irpa, Bolivia — September 15, 2026. Retrieved September 15, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000thlk/