M3.1 Earthquake 70 km N of Tierras Nuevas Poniente, Puerto Rico — July 12, 2020
2020-07-12 15:55:21 UTC (2020-07-12) · approx. 11:55 AM UTC-4 local
On July 12, 2020 at 15:55 UTC, a magnitude 3.1 shallow crustal earthquake struck 70 km N of Tierras Nuevas Poniente, Puerto Rico, at a depth of 13.0 km and coordinates 19.1001°, -66.4508°.
Physical scale: An earthquake of magnitude 3.1 releases seismic energy equivalent to roughly 747 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 87 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-66.4508°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Tierras Nuevas Poniente, Puerto Rico?
The magnitude 3.1 earthquake that struck 70 km N of Tierras Nuevas Poniente, Puerto Rico on July 12, 2020 at 15:55 UTC had a depth of 13.0 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: pr2020194006). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, July 12, 2020). M3.1 Earthquake 70 km N of Tierras Nuevas Poniente, Puerto Rico — July 12, 2020. Retrieved September 19, 2020 from https://www.earthquaketracker.org/earthquakes/event/pr2020194006/