M3.0 Earthquake 9 km S of Guánica, Puerto Rico — June 16, 2023
2023-06-16 20:36:52 UTC (2023-06-16) · approx. 4:36 PM UTC-4 local
On June 16, 2023 at 20:36 UTC, a magnitude 3.0 shallow crustal earthquake struck 9 km S of Guánica, Puerto Rico, at a depth of 7.8 km and coordinates 17.8822°, -66.9047°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 477 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 71 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.9047°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near Guánica, Puerto Rico?
The magnitude 3.0 earthquake that struck 9 km S of Guánica, Puerto Rico on June 16, 2023 at 20:36 UTC had a depth of 7.8 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 3.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.0 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr71413673). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, June 16, 2023). M3.0 Earthquake 9 km S of Guánica, Puerto Rico — June 16, 2023. Retrieved June 16, 2023 from https://www.earthquaketracker.org/earthquakes/event/pr71413673/