M3.1 Earthquake 9 km SSE of Lares, Puerto Rico — July 16, 2020
2020-07-16 20:02:10 UTC (2020-07-16) · approx. 4:02 PM UTC-4 local
On July 16, 2020 at 20:02 UTC, a magnitude 3.1 shallow crustal earthquake struck 9 km SSE of Lares, Puerto Rico, at a depth of 12.0 km and coordinates 18.2246°, -66.8320°.
Physical scale: An earthquake of magnitude 3.1 releases seismic energy equivalent to roughly 607 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 79 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.8320°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Lares, Puerto Rico?
The magnitude 3.1 earthquake that struck 9 km SSE of Lares, Puerto Rico on July 16, 2020 at 20:02 UTC had a depth of 12.0 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 3.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr2020198002). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, July 16, 2020). M3.1 Earthquake 9 km SSE of Lares, Puerto Rico — July 16, 2020. Retrieved September 26, 2020 from https://www.earthquaketracker.org/earthquakes/event/pr2020198002/