M4.1 Earthquake 11 km SSW of Puerto El Triunfo, El Salvador — December 18, 2021
2021-12-18 22:15:56 UTC (2021-12-18) · approx. 4:15 PM UTC-6 local
On December 18, 2021 at 22:15 UTC, a magnitude 4.1 intermediate depth earthquake struck 11 km SSW of Puerto El Triunfo, El Salvador, at a depth of 103.5 km and coordinates 13.1841°, -88.5923°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-88.5923°E
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Common Questions
How strong was the magnitude 4.1 earthquake near Puerto El Triunfo, El Salvador?
The magnitude 4.1 earthquake that struck 11 km SSW of Puerto El Triunfo, El Salvador on December 18, 2021 at 22:15 UTC had a depth of 103.5 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 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000gdhq). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, December 18, 2021). M4.1 Earthquake 11 km SSW of Puerto El Triunfo, El Salvador — December 18, 2021. Retrieved March 1, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000gdhq/