M4.6 Earthquake 180 km SW of Merizo Village, Guam — December 31, 2023
2023-12-31 19:19:14 UTC (2023-12-31) · approx. 5:19 AM UTC+10 local
On December 31, 2023 at 19:19 UTC, a magnitude 4.6 shallow crustal earthquake struck 180 km SW of Merizo Village, Guam, at a depth of 30.1 km and coordinates 12.2725°, 143.3492°. This earthquake was detected by 24 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
143.3492°E
Technical Information
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Common Questions
How strong was the magnitude 4.6 earthquake near Merizo Village, Guam?
The magnitude 4.6 earthquake that struck 180 km SW of Merizo Village, Guam on December 31, 2023 at 19:19 UTC had a depth of 30.1 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 12.2725°, 143.3492°, which is 180 km SW of Merizo Village, Guam.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us6000m2x2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, December 31, 2023). M4.6 Earthquake 180 km SW of Merizo Village, Guam — December 31, 2023. Retrieved March 2, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000m2x2/