M4.6 Earthquake 217 km SW of Merizo Village, Guam — March 12, 2023
2023-03-12 18:16:26 UTC (2023-03-12) · approx. 4:16 AM UTC+10 local
On March 12, 2023 at 18:16 UTC, a magnitude 4.6 shallow crustal earthquake struck 217 km SW of Merizo Village, Guam, at a depth of 10.0 km and coordinates 11.9125°, 143.2207°. This earthquake was detected by 38 seismic stations with good 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
143.2207°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake near Merizo Village, Guam?
The magnitude 4.6 earthquake that struck 217 km SW of Merizo Village, Guam on March 12, 2023 at 18:16 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 11.9125°, 143.2207°, which is 217 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: us7000jksp). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, March 12, 2023). M4.6 Earthquake 217 km SW of Merizo Village, Guam — March 12, 2023. Retrieved May 20, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000jksp/