M3.3 Earthquake 7 km NNW of Brenas, Puerto Rico — June 30, 2023
2023-06-30 21:04:10 UTC (2023-06-30) · approx. 5:04 PM UTC-4 local
On June 30, 2023 at 21:04 UTC, a magnitude 3.3 intermediate depth earthquake struck 7 km NNW of Brenas, Puerto Rico, at a depth of 77.8 km and coordinates 18.5300°, -66.3568°.
Physical scale: An earthquake of magnitude 3.3 releases seismic energy equivalent to roughly 1.5 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 120 m — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 1 citizen response to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-66.3568°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.3 earthquake near Brenas, Puerto Rico?
The magnitude 3.3 earthquake that struck 7 km NNW of Brenas, Puerto Rico on June 30, 2023 at 21:04 UTC had a depth of 77.8 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 3.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.3 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr71415328). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, June 30, 2023). M3.3 Earthquake 7 km NNW of Brenas, Puerto Rico — June 30, 2023. Retrieved June 30, 2023 from https://www.earthquaketracker.org/earthquakes/event/pr71415328/