M3.8 Earthquake near Mona Passage — October 30, 2021
2021-10-30 20:03:11 UTC (2021-10-30) · approx. 3:03 PM UTC-5 local
On October 30, 2021 at 20:03 UTC, a magnitude 3.8 intermediate depth earthquake struck near Mona Passage, at a depth of 108.0 km and coordinates 18.1173°, -68.3571°.
Physical scale: An earthquake of magnitude 3.8 releases seismic energy equivalent to roughly 7.1 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 244 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-68.3571°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.8 earthquake near Mona Passage?
The magnitude 3.8 earthquake that struck near Mona Passage on October 30, 2021 at 20:03 UTC had a depth of 108.0 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 3.8 earthquakes can continue for several days and gradually diminish over time.
Actions
Understanding This Data
Magnitude 3.8 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: pr2021303006). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 30, 2021). M3.8 Earthquake near Mona Passage — October 30, 2021. Retrieved January 14, 2022 from https://www.earthquaketracker.org/earthquakes/event/pr2021303006/