M3.5 Earthquake 50 km WSW of Stella, Puerto Rico — December 28, 2020
2020-12-28 22:14:35 UTC (2020-12-28) · approx. 5:14 PM UTC-5 local
On December 28, 2020 at 22:14 UTC, a magnitude 3.5 intermediate depth earthquake struck 50 km WSW of Stella, Puerto Rico, at a depth of 145.0 km and coordinates 18.1606°, -67.6933°.
Physical scale: An earthquake of magnitude 3.5 releases seismic energy equivalent to roughly 2.3 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 147 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-67.6933°E
Technical Information
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Common Questions
How strong was the magnitude 3.5 earthquake near Stella, Puerto Rico?
The magnitude 3.5 earthquake that struck 50 km WSW of Stella, Puerto Rico on December 28, 2020 at 22:14 UTC had a depth of 145.0 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 3.5 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.5 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr2020363000). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, December 28, 2020). M3.5 Earthquake 50 km WSW of Stella, Puerto Rico — December 28, 2020. Retrieved March 6, 2021 from https://www.earthquaketracker.org/earthquakes/event/pr2020363000/