M4.3 Earthquake 65 km WSW of Merizo Village, Guam — October 29, 2023
2023-10-29 23:41:41 UTC (2023-10-29) · approx. 9:41 AM UTC+10 local
On October 29, 2023 at 23:41 UTC, a magnitude 4.3 intermediate depth earthquake struck 65 km WSW of Merizo Village, Guam, at a depth of 134.3 km and coordinates 13.1425°, 144.0761°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
144.0761°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near Merizo Village, Guam?
The magnitude 4.3 earthquake that struck 65 km WSW of Merizo Village, Guam on October 29, 2023 at 23:41 UTC had a depth of 134.3 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000l8e1). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, October 29, 2023). M4.3 Earthquake 65 km WSW of Merizo Village, Guam — October 29, 2023. Retrieved January 10, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000l8e1/