M3.4 Earthquake 23 km NNE of Fajardo, Puerto Rico — November 11, 2021
2021-11-11 15:06:59 UTC (2021-11-11) · approx. 11:06 AM UTC-4 local
On November 11, 2021 at 15:06 UTC, a magnitude 3.4 intermediate depth earthquake struck 23 km NNE of Fajardo, Puerto Rico, at a depth of 92.0 km and coordinates 18.5126°, -65.5513°.
Physical scale: An earthquake of magnitude 3.4 releases seismic energy equivalent to roughly 2.0 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 136 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-65.5513°E
Technical Information
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Common Questions
How strong was the magnitude 3.4 earthquake near Fajardo, Puerto Rico?
The magnitude 3.4 earthquake that struck 23 km NNE of Fajardo, Puerto Rico on November 11, 2021 at 15:06 UTC had a depth of 92.0 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.4 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr2021315007). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, November 11, 2021). M3.4 Earthquake 23 km NNE of Fajardo, Puerto Rico — November 11, 2021. Retrieved January 15, 2022 from https://www.earthquaketracker.org/earthquakes/event/pr2021315007/