M3.5 Earthquake near Mona Passage — July 13, 2023
2023-07-13 23:41:48 UTC (2023-07-13) · approx. 7:41 PM UTC-4 local
Felt by 20 people across nearby locations.
On July 13, 2023 at 23:41 UTC, a magnitude 3.5 shallow crustal earthquake struck near Mona Passage, at a depth of 16.0 km and coordinates 18.0346°, -67.2095°. The earthquake was reported felt by 20 peopleacross nearby locations, with a maximum shaking intensity of Modified Mercalli Intensity (MMI) 2.3 (weak). This earthquake was detected by 25 seismic stations with good location accuracy and was assigned a USGS significance rating of 201, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 3.5 releases seismic energy equivalent to roughly 3.1 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 167 m — a useful intuition for the size of the slip patch on the fault.
ShakeMap — predicted shaking intensity
Modeled ground-motion intensity contoured on the Modified Mercalli scale (MMI). Computed by the USGS from the moment-tensor solution and regional ground-motion prediction equations.
Source: U.S. Geological Survey ShakeMap. View interactive ShakeMap on USGS
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 20 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
-67.2095°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.5 earthquake near Mona Passage?
The magnitude 3.5 earthquake that struck near Mona Passage on July 13, 2023 at 23:41 UTC had a depth of 16.0 km. It was felt by 20 people with maximum shaking intensity of MMI 2.3 (weak). For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 18.0346°, -67.2095°, which is near Mona Passage.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.5 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: pr2023194008). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, July 13, 2023). M3.5 Earthquake near Mona Passage — July 13, 2023. Retrieved September 16, 2023 from https://www.earthquaketracker.org/earthquakes/event/pr2023194008/