M4.1 Earthquake 40 km SSW of Merizo Village, Guam — August 4, 2023
2023-08-04 18:05:15 UTC (2023-08-04) · approx. 4:05 AM UTC+10 local
On August 4, 2023 at 18:05 UTC, a magnitude 4.1 shallow crustal earthquake struck 40 km SSW of Merizo Village, Guam, at a depth of 49.4 km and coordinates 12.9059°, 144.5847°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
144.5847°E
Technical Information
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Common Questions
How strong was the magnitude 4.1 earthquake near Merizo Village, Guam?
The magnitude 4.1 earthquake that struck 40 km SSW of Merizo Village, Guam on August 4, 2023 at 18:05 UTC had a depth of 49.4 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000kzez). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 4, 2023). M4.1 Earthquake 40 km SSW of Merizo Village, Guam — August 4, 2023. Retrieved October 7, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000kzez/