M4.9 Earthquake 105 km S of La Libertad, El Salvador — December 4, 2021
2021-12-04 18:44:49 UTC (2021-12-04) · approx. 12:44 PM UTC-6 local
Felt by 1 person across nearby locations.
On December 4, 2021 at 18:44 UTC, a magnitude 4.9 shallow crustal earthquake struck 105 km S of La Libertad, El Salvador, at a depth of 10.0 km and coordinates 12.5463°, -89.4998°.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 1 citizen response to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-89.4998°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.9 earthquake near La Libertad, El Salvador?
The magnitude 4.9 earthquake that struck 105 km S of La Libertad, El Salvador on December 4, 2021 at 18:44 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 12.5463°, -89.4998°, which is 105 km S of La Libertad, El Salvador.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us6000g928). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, December 4, 2021). M4.9 Earthquake 105 km S of La Libertad, El Salvador — December 4, 2021. Retrieved February 12, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000g928/