M3.9 Earthquake 153 km NNE of Cruz Bay, U.S. Virgin Islands — July 9, 2023
2023-07-09 21:03:03 UTC (2023-07-09) · approx. 5:03 PM UTC-4 local
Felt by 15 people across nearby locations.
On July 9, 2023 at 21:03 UTC, a magnitude 3.9 intermediate depth earthquake struck 153 km NNE of Cruz Bay, U.S. Virgin Islands, at a depth of 73.0 km and coordinates 19.6198°, -64.2566°. This earthquake was detected by 17 seismic stations with limited location accuracy due to sparse station coverage and was assigned a USGS significance rating of 243, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 3.9 releases seismic energy equivalent to roughly 11 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 305 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 15 citizen responses 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
-64.2566°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.9 earthquake near Cruz Bay, U.S. Virgin Islands?
The magnitude 3.9 earthquake that struck 153 km NNE of Cruz Bay, U.S. Virgin Islands on July 9, 2023 at 21:03 UTC had a depth of 73.0 km. For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 19.6198°, -64.2566°, which is 153 km NNE of Cruz Bay, U.S. Virgin Islands.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.9 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: pr2023190001). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, July 9, 2023). M3.9 Earthquake 153 km NNE of Cruz Bay, U.S. Virgin Islands — July 9, 2023. Retrieved September 16, 2023 from https://www.earthquaketracker.org/earthquakes/event/pr2023190001/