M3.0 Earthquake in the Puerto Rico region — July 28, 2023
2023-07-28 23:57:52 UTC (2023-07-28) · approx. 7:57 PM UTC-4 local
On July 28, 2023 at 23:57 UTC, a magnitude 3.0 shallow crustal earthquake struck in the Puerto Rico region, at a depth of 16.1 km and coordinates 18.0170°, -66.8402°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 567 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 77 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.8402°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake in the Puerto Rico region?
The magnitude 3.0 earthquake that struck in the Puerto Rico region on July 28, 2023 at 23:57 UTC had a depth of 16.1 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: pr71419533). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, July 28, 2023). M3.0 Earthquake in the Puerto Rico region — July 28, 2023. Retrieved September 30, 2023 from https://www.earthquaketracker.org/earthquakes/event/pr71419533/